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What's New at ISRM and Ongoing Blog

Most recent Activities, Gifts, Edits and Additions
of Specimens to the Galleries


KEEP ISRM FREE!

YYYY.MM.DD-## - Gallery - Description of Edits, Additions(Replacements) or Donations.


2017.08.09 - Germany - Added new catagory:Schacht & Westerich, Hamburg, Germany and 2 examples of System "Cutz" 1916 slide rules.
2017.08.09 - Pickett - Added Pickett N-700T Type-A1 USAF Aerial Photo Slide Rule gifted by Walter Shawlee 2, British Columbia, Canada.
2017.08.09 - Pickett - Added Pickett 52T Type-A1 USAF Aerial Photo Slide Rule gifted by Steve Wilkie, Toronto, Canada.
2017.08.09 - Dietzgen - Updated ascession numbers and References to items gifted to the Computer History Museum
2017.08.09 - Dietzgen - Added(Replaced) Dietzgen 1745 Mannheim (S485), Early frameless cursor, with restored lens
2017.08.09 - Nestler - Added Nestler 23R System Reitz c1906, All-Glass Cursor
2017.08.08 - K&E_Specialty - Added(Replaced) K&E 4139 sn936496 (S445). Gift of Ed Wright collection.
2017.08.08 - ISRM Friends - Added Maria Sayre Cole and Rob Snider.
2017.08.08 - K&E_Standard - Added K&E 4083-3 Duplex Vector sn395769 c1939. Gift Of Rob Snider Belonged To Father Homer D. Snider
2017.08.08 - K&E_Standard - Added K&E 4080-3 sn352819 belonging to Clifford_L. Sayer Jr. Gift Of Marie Sayer Cole
2017.08.08 - Dietzgen - Added Dietzgen 1759B Philips belonging to Clifford_L. Sayer Sr. Gift Of Marie Sayer Cole
2017.08.07 - Hemmi/Hughes-Owen - Added Hughes-Owen 1768C belonging to Henri Doiron, with his college photo.. Gift of Daughter Nathalie Doiron, Canada
2017.08.07 - MiscUSA/Gerber - Added original signed letter from H. Joseph Gerber to Graphanalogue specimen, which was a personal gift.
2017.08.07 - SR_Library/UnitedStates - Added Gerber GraphAnalogue GA-103 manual and Gerber Variable Scale manual. Gifts of Marie Sayre Cole
2017.08.07 - MiscUSA/Gerber - Updated Gerber GraphAnalogue GA-103 Belonged to Cliifford L.Sayre. Gift Of Marie Sayre Cole. Added manuals to both specimens.
2017.08.07.01 - Received gift of Hughes-Owen 1768C belonging to Henri Doiron. Gift of Daughter Nathalie Doiron, Canada
2017.08.03 - SR_Library/General - Tasco Pocket Arithmometer Instructions from Peter Turk of Canada.
2017.08.02.- KE_Specialty - Added K&E 4095-3 Merchants Rule with Magnifying Cursor (1922-1941), originally Tom Wyman Collection.
2017.08.02/M370 - SR_Library/Books - Received Die Nestlers Geschichte einer Lahrer Unternehmerfamilie, Gift of Jürgen Nestler.
2017.08.01 - Italy - Added Regolo Di Convergenza (Artllery). Gift Of Nicola Marras, Italy
2017.08.01 - K&E - Added K&E 4076 c1913 Duplex Trig, gift of Robert Otnes, California
2017.08.01 - Hemmi - Added Hemmi P3526 Slide Rule Scan By Paul Ross
2017.08.01 - SR_Library/MiscUSA - Added/Replaced SIC Model 1570 Professional Slide Rule Instructions. Scan provided by Ralph T. Soule.
2017.07.27 - Dietzgen -Added[replaced] Dietzgen 8" Binary Slide Rule [C21] (Gilson) from Linda Boclair of Voohees, NJ. Belonged to Spafford W. Schanck (1899-1985).
2017.07.27 - Faber - Added[Replaced] Faber-Castell 2/84N Mathema [Ref] Universal Slide Rule, from Philip Rodley, Upper Hutt, New Zealand.
2017.07.27.02/M369 - Received gift of Dietzgen 8" Binary Slide Rule (Gilson) with manual from Linda Boclair of Voohees, NJ. Belonged to Spafford W. Schanck (1899-1985).
2017.07.27.01/M368 - Received gift of Faber-Castell 2/84N Mathema Universal Slide Rule, with manual, from Philip Rodley, Upper Hutt, New Zealand. 2017.07.27 - People with slide rule/Ephemera - Added 7 new images, include photos from the Movie "Hidden Figures". A MUST see!
2017.07.26 - SR Loaner Program. Added pictures of students submitted from the following schools that are using ISRM slide rule sets
  • Norma Tanner's class at Hawthorn Middle School, Vernon Hills, Illinois
  • Jim Hus's class at Highlands High School, Highland, Indiana
  • Laurie Emery's class at South Winneshiek Community School, Calmar, Iowa
  • Dr. William Priestley's class at Harry S. Truman High School, Levittown. Pennsylvania
  • David (Randy) Sullivan's slide rule club at University of Oregon, Uegene, Oregon
  • John Butler's class at Murrah High School, Jackson, Mississippi
  • Dr. Justin Young's class at Ashland University, Ashland, Ohio
2017.07.26 - Nestler - Added Nestler No28 Stadia Rule Instructions (Italian) to Nestler Nr.28. Updated layout.
2017.07.26 - SR_Library/Europe - Added Nestler No28 Stadia Rule Instructions (Italian). Updated layout.
2017.07.25 - Search ISRM - Replaced Search Engine with one powered by Google. Very fast and concise
2017.07.25 - SR Course - Added Teaching Aid: "Was There Life Before Computer? Calculations before We Went Digital" by Nicola Marras
2017.07.25 - MiscUSA - Added 2 Paisley Calculator Company Model A, one Aluminum Body, the other a Bakelite Body. Images from Oughtred Society, Ebay, and National American History Museum.
2017.07.25 - BrandIndex - Added James R. Paisley Company
2017.07.24 - Circular - Replaced REF Gilson Atlas Calculator Patent 1-17-1922, Copyright 1931,, with physical specimen obtained at IM204. Updated layout.
2017.07.24 - MiscUSA - Updated The Small Calculator with physical specimen. Gift ofGretchen S. Lebrun (Canada) and Jonathan Small, grand children of Gilbert Small.
2017.07.24 - Blundell - Added Nelson-Jones Circuit Designers Slide Rule 1974 Key Electronics, made by Blundell Harling. Updated layout.
2017.07.24 - Nestler - Added Nestler 1908 Model 23 with 1911 catalog page. Scan provided by Tom Gahl, son of original owner. Updated layout.
2017.07.24 - KE_Standard - KE 4092 Lot3 c1915 All-Glass cursor and 4041 lot211. Belonged to R.W. Kratz, gifted by grandson Nick Kratz.
2017.07.24 - Pocket Watch - Added Halden Calculex Patent Circular Slide Rule, Belonged to R.W. Kratz, gifted by grandson Nick Kratz.
2017.07.24 - SR_Library/British-Australia - Added Halden Calculex circular slide rule instructions. Gift of Nick Kratz, Pasadena, California
2017.07.23 - SR_Library/USA -Added Bruning 68-471 and Bruning 2472 circular slide rule instructions. Gifts Of Bruce HildenBrand, Mountainview, CA
2017.07.23 - MiscUSA/Bruning -Added Bruning 68-471 branded 8" diameter and Bruning 2472 4" Gilson Binary circular slide rules. Gifts Of Bruce HildenBrand
2017.07.23 - Circular -Added Bruning 68-471 branded 8" diameter and Bruning 2472 4" Gilson Binary circular slide rules. Gifts Of Bruce HildenBrand
2017.07.22 - MiscJapan - Added Hope No. 32 Mannhiem. gift of Philip Rodley, Upper Hutt, NZ. Updated layout.
2017.07.22 - SR_Library/British - Added Thornton AD070 Instructions. Gift of Carol Summers, Welwyn Garden City, Hertfordshire, England UK
2017.07.22 - PIC/Thornton - Added Thornton AD070. gift of Carol Summers, Welwyn Garden City, Hertfordshire, England UK. Updated layout.
2017.07.22 - Relay/Ricoh - Added Early Unknown model # Pocket slide rule, Labeled Williams & Benwell Electrical Engineers. gift of Philip Rodley, Upper Hutt, NZ. Updated layout.
2017.07.22 - BrandIndex - Added Buss Maker
2017.07.22 - Rarities - Unsigned Brass Sector (c1730), assumed to be Made by George Adams, London
2017.07.22 - Rarities - Dual slide Ivory (bone) Proof Rule No.1 Buss Maker 48 Hatton Garden London. gift of Philip Rodley, Upper Hutt, NZ
2017.07.21 - Rarities - Added W. Elliot Ivory Sector (pre 1853), and Celluloid Protractor (c1920) gift of Philip Rodley, Upper Hutt, NZ
2017.07.21 - SR_Library/Japan - Added Hemmi 283P Instruction Manual. Scann by Patrick Coyle, UK
2017.07.21 - SR_Library/Post - Added Post 1445P Instruction Manual. Scan by David Hilton, CA
2017.07.21 - Dietzgen _ Added Dietzgem 1732 Decimal Trig Log Log sn, box, manual, warranty belonging to Bill Teer, Fairfax, Virginia.
2017.02.16/M365 - Received scan of Hemmi P283 Instruction Manual from Patrick Coyle, UK, Now a Friend of the Museum
2017.07.16 - Made arrangement to send a Flying Fish 1003 to Philip Rodley, Upper Hutt, New Zealand.
2017.07.15.01 - Received gift of Dietzgem 1732 Decimal Trig Log Log sn, box, manual, warranty belonging to Bill Teer, Fairfax, Virginia. Now a Friend of the Museum.
2017.07.06 - Received donation from Richard Davis of California, a Friend of the Museum.
2017.07.02 - Received donation from Jose Gabriel Fernandez, a Friend of the Museum.
2017.06.30 - Received donation from David Hilton of California, a Friend of the Museum.
2017.06.28 - Ephemera - Added 8 new historical images/photos
2017.06.25 - MiscUSA/Bruning - Added Bruning 68-471 Binary and 2472 Midget (made by Gilson). Gift of Bruce Hildenbrand.
2017.06.25 - Orient - Added Early Chinese Shanghai Ding Feng 5471 duplex gift of Philip Rodley (NZ) and Flying Fish 1009 image from Rod Lovette Collection (Uk)
2017.06.20 - Received donation from Jeremy McCarthy of the UK, a Friend of the Museum.
2017.06.20 - Received donation from Roi Gift of Washington, a Friend of the Museum.
2017.06.19 - Ephemera - Added 2 screenshots from BBC Television showing slide rules.and 1 HH Robertson Ad
2017.06.19 - Nestler - Added Nestler_34, 1912-47. Scan provided by Otto Van Poelje Collection, Netherlands 2017.06.17 - Received gift of slide rules from Philip Rodely, Upperhutt, New Zealand.
  • 17.06.17.01 - Dual slide Ivory (bone) Proof Rule. Stuart Woodhouse Gauger No.1 Buss Maker 48 Hatton Garden London - Add to gallery
  • 17.06.17.02 - Ivory Sector (bone) W Elliot, London - Add to gallery
  • 17.06.17.03 - Japanese Pocket Slide Rule (Ricoh?) Name on SR: Williams & Benwell Electrical Engineers - Add to gallery
  • 17.06.17.04 - Pilot 8" slide rule, missing cursor - scrap to art project
  • 17.06.17.05 - Hope 32 Slide Rule - Add to gallery
  • 17.06.17.06 - Aristo Nr. 89 - Fundraiser
\ 2017.06.14 - Received gift of 4 slide rules from Bruce Hildenbrand, Mountainview, CA
  • 17.06.14.01 - Bruning 68-471 branded 8" diameter Gilson Binary circular slide rule, ©1940, Green sleeve, Manual Ref:ISRM M363
  • 17.06.14.02 - Bruning 68-471 branded 8" diameter Gilson Binary circular slide rule. ©1940,
  • 17.06.14.03 - Bruning 2472 branded 4-1/4" diameter Gilson Midget Binary circular slide rule, ©1936, Brown sleeve, Manual Ref:ISRM M363
  • 17.06.14.04 - K&E N4053-3 sn917195 Kercs , Scrap for art project
  • ISRM M363 - Bruning 68-471 Binary circular slide rule Manual Ref:ISRM 17.06.14.01
  • ISRM M366 - Bruning 2472 Binary Midget circular slide rule Manual Ref:ISRM 17.06.14.02
2017.06.14 - SR_WhosWho - Updated David D. McFarland entry. David passed on April 20, 2017 at the age of 75. Even while in a wheel chair he attended all the Oughtred Society meetings.
2017.06.13 - SR_WhosWho - Added Mike Weaver of the U.K. Collector and donor of slide rules to ISRM galleries.
2017.06.12 - Purchased domain name: sliderulemuseum.org to use for future website development to insure we don't blow up sliderulemuseum.com. Watch my progress.
2017.06.11 - Calculators, SR_Terms, SR_Loaners, Ephemera, and others. - Altered heading and increased width to 820 pixels.
2017.06.10 - Library_USA, WhatsNew, Intro, Friends, and others. - Altered heading and increased width to 820 pixels.
2017.06.09 - KE_Standard and KE_Specialty - Altered heading and increased width to 820 pixels.
2017.06.08 - SRM_Menu - Reduced the length of the left navigation menu by moving most of the upper section to the HOME page under the Library links. Created a separate page for the Brand Index.
2017.06.07 - The Curator is expirementing with changing the website to be more mobile friendly. Large line spacing between link targets for touchscreens. You will see erratic behavior.
2017.06.02 - ISRM Home Page - Reformated the paragraphs and added a slide rule image.
2017.05.23 - Received donation from Steve Smith
2017.05.23.01 - Restored a Nestler 23R System Rietz with a Dietzgen all-glass cursor - Replace S250 in Nestler Gallery 2017.05.22 - Received gift of misc slide rules, abacus and drafting tools from Pam Eaton of Dennis, Massachusettes
  • 17.05.22.01 - Abacus/Soroban beads:1x4x15 195x53x15mm in red/black cardboard sleeve
  • 17.05.22.02 - Pickett 120 for SR Loaner program
  • 17.05.22.03 - Staedtler-Mars No54455 Reitz-Scolaria - Variant, Add to Germany/DDR Gallery
  • 17.05.22.04 - Sterling Metric Converter 1973, yellow slide
  • 17.05.22.05 - Aristo Scholar Nr.0903LL Urheberrechtlich gesschützt dcG5925 - all white stock and slide.- Add to gallery
  • 17.05.22.06 - Staedtler-Mars No54401 Darmstadt dc87
  • 17.05.22.07 - Dietzgen 1760 Mannheim Slide Rule, broken all-glass cursor
  • 17.05.22.08 - Perrygraf - Royal Coach Sprinklers Irrigation Slide Chart
2017.05.02 - Received gift of 33 slide rules from Mike Weaver of the United Kingdom. Note: The assigned ISRM ascession numbers are based on Mr. Weaver's personal references and are non-sequential.30 of the slide rules are new to ISRM or are physical replacements to existing virtual images.
  • 17.05.02.01 - Jakar No.1013. Chipped stock. Cracked cursor.
  • 17.05.02.02 - Faber Castell 52/82 Log Log D-Stab, Made in Switzerland. Replace S242
  • 17.05.02.08 - W.H. Smith Simplified Rietz Pocket Slide Rule. With Manual - Replace P207 in U.K. Gallery.
  • 17.05.02.09 - Unique Universal - New to ISRM Replace S279 in Unique Gallery
  • 17.05.02.12 - Unique 'Brighton' USRC Logo - New/Replace S279 in Unique Gallery
  • 17.05.02.13 - Unique Ten-Twenty, brown case - New to ISRM Replace REF in Unique Gallery
  • 17.05.02.14 - A.W.Faber Castell 1/87 Rietz DC502 - New Addition to Faber Gallery
  • 17.05.02.15 - Blundell Harling BRL 304 Darmstadt Academy, England. White Braces - new addition to Blundell Gallery
  • 17.05.02.16 - K&E 4081-3 Log Log Decitrig sn979739 KERCS Good leather case - for fundraiser.
  • 17.05.02.19 - Sun Hemmi 40RK Mannheim dc HG - New Addition to Hemmi Gallery
  • 17.05.02.21 - Blundell Harling 802, England - new addition to Blundell Gallery
  • 17.05.02.24 - UTO Darmstadt No. 651U Promo Hellerman Pocket - new addition to UTO or U.K Hellerman Gallery
  • 17.05.02.25 - Jakar No29 Student Log/Log with Manual - Replace S282
  • 17.05.02.26 - Sterling 694 Deci Trig Log-Log in Retail Packaging - Add to loaner program
  • 17.05.02.27 - W.H. Smith Simplified Rietz 10" Slide Rule.New Addition to U.K. Gallery.
  • 17.05.02.28 - Flying Fish 1004 Vector Log Log Duplex - New Addition, Replace REF in Orient Gallery
  • 17.05.02.31 - Archimedes Marca Registrada, Brazil - Add to Anericas/S.A./Mexico Gallery
  • 17.05.02.33 - P.I.C. No.101/PCB Add to PIC/Thornton Gallery
  • 17.05.02.34 - Simplon Primary Log Log - New Addition to Simplon U.K. Green/clear sleeve. similar to Bilateral Log Log.
  • 17.05.02.35 - Engineering Instruments 10inch Slide Rule. No model number. Blue/yellow sleeve.
  • 17.05.02.36 - The Technical Standard, Aeronautical Slide Rule - Add to U.K. Gallery
  • 17.05.02.41 - Dietzgen 1732 Decimal Trig Log Log sn527230 - Replace S248
  • 17.05.02.43 - Nestler No.370 Elektro with Manual dc1S4 (Replace 09.04.24.06)?
  • 17.05.02.44 - Hemmi P281 - Duplicate for fundraiser
  • 17.05.02.45 - Blundell Luton Thype G-1, dark brown Bakelite. Red cardboard box. Blundell's 1st slide rule model. Replace REF in Gallery
  • 17.05.02.46 - P.I.C. No.3654 Sheet metal frame cursor, blk cardboard case - Add to PIC/Thornton Gallery
  • 17.05.02.47 - Hughes-Owens 1768C - dcHF - Duplicate for Fund Raiser
  • 17.05.02.48 - Logarex Exponent 27602-II, Czechoslovakia - New Addition to Eastern Europe Gallery
  • 17.05.02.49 - A.W.Faber Castell 1/60 Mannheim DC750 - New Addition to Faber Gallery
  • 17.05.02.51 - Royal No. 1002A - Add to Misc.Japan Gallery
  • 17.05.02.53 - Marc Pocket slide rule. Inch scale. New Addition to gallery.
  • 17.05.02.54 - Helix Log Log U07 - New Addition to Helix U.K.. Gallery
  • 17.05.02.57 - Blundell Luton Type G-2, Black Bakelite. First generation. New to Gallery
  • 17.05.02.59 - Diwa Rietz-Ideal No.1-1 dc25, Denmark, Brown leather sleeve - New Addition to Diwa Gallery
  • 17.05.02.60 - B.R.L. S100 Pocket Mannhiem Promo, Scottish Cables Limited. Add to BRL Gallery
2017.04.26.01 - Received gift of Pickett N1010-ES Trig from Robert Elliot of Caray, NC.
2017.04.01.01/M371 - Received gift of Tasco Pocket Arithmometer from Peter Turk of Canada.
2017.02.16 - Fundraiser - received a donation from Kent Berglund
2017.02.16 - Fundraiser - received a donation from James Edel
2017.02.16/M364 - Received scan of Post 1445P Instruction Manual from David Hilton
2017.01.17 - Faber - Corrected date of first slide rule production from 1882 to 1892, according to Dieter von Jezierski, as discovered by Trevor Catlow of the UK.
2017.01.07 - Fundraiser - Received donation from Richard Philabaum, now a Friend of the Museum
2017.01.05 - Fundraiser - Received donation from Jordan Hatherley, now a Friend of the Museum

2016.12.28 - Fundraiser - Received donation from Riki Nakamoto of Hawaii, Friend of the Museum
2016.12.22 - Fundraiser - Received donation from Kenneth Yanosko of California, now a Friend of the Museum
2016.12.12 - Fundraiser - Received donation from Hans Milton of Sweden, a Friend of the Museum
2016.11.25 - Fundraiser - Received donation from Peter Wiesbauer of Germany and Michael Fink of Australia., Friends of the Museum
2016.09.19 - Received gift of slide rules from Rob Snider of Nederland, Texas. Belonging to father Homer D,. Snider
  • 16.09.19.01 - K&E 4083-3 Vector Duplex sn395769 KERCS - to be restored and added to gallery
  • 16.09.19.02 - K&EN4058W Beginners slide ruole , duplicate
2016.08.07 - Received gift of Slide Charts from David R. Despain of Fort Worth, Texas.
  • 16.08.07.01 - American Slide Chart - Andrew Heliax Connector Guide, Andrew Corp.
  • 16.08.07.02 - American Slide Chart - Signal level Conversion, Spectrum Contriol, Inc
  • 16.08.07.03 - Rockwell Alignment Guide For 309B type Equalizer
  • 16.08.07.04 - Arth-o-graf Slide Chart - Wavelength, Decibel Conversion, Sinclair Technologies
  • 16.08.07.05 - American Slide Chart - Western MicrowaveFerrite Device Calculator
  • 16.08.07.06 - Andrew Heliax Coax cable Performance Calculator, 1994, Andrew Corp.
  • 16.08.07.07 - National Semiconductor Transmission Line Redesigner
  • 16.08.07.08 - Perrygraf GE Mobile Radio Tone Frequency Calculator 1973
  • 16.08.07.09 - Newark Electronics Metric Converter
  • 16.08.07.10 - Indium Corp. Pocket Flux Calculator
  • 16.08.07.11 - Rogers Corp. Frequency Copper Clad Laminate Materials
  • 16.08.07.12 - Times Microwave Coax Cable Chart
2016.08.01 - Fundraiser - Received donation from Patrick Rowlinson of New Zealand.
2016.07.28.01/M362 - Received gift of Thornton AD070 slide rule with instructions, from Carol Summers, of Welwyn Garden City, Hertfordshire, England UK with bio and photo.(in email).
2016.07.20 - Fundraiser - Received donation from D.L. Hilton of Westchester, California.
2016.07.15 - Fundraiser - Received donation from David Despain of Fort Worth, Texas.
2016.07.10 - Received various slide charts from Monagle, Orange California.
  • 16.07.10.01 - American Slide Chart Vortec Corp. Heat Load calculator
  • 16.07.10.02 - American Slide Chart, Yuasa Battery Discharge Calculations
2016.07.06 - Received various slide charts and disks and mechanical calculators from Bert Kolts of Estes Park, Colorado.
  • 16.07.06.01 - Chadwick Majic Brain Calculator
  • 16.07.06.02 - Add-A-Mite Pocket Calculator
2016.07.05 - Fundraiser - Received donation from Richard Burns.
2016.07.01 - Received gift of slide rules from Phillip Rodley, Upperhutt, New Zealand.
  • 16.07.01.01 - A.W. Faber Decimal Keeper slide rule, Bavaria, Missing lens.
  • 16.07.01.02 - Early Chinese Shanghai Ding Feng 5471 duplex
2016.06.02 - Received gift of slide rules from Bob Schwartz, Temple, Texas.
  • 16.06.02.01 - Pickett 800-T, alternate scale set,grooved stock, metal bars, rounded braces Missing screws. To Gallery
  • 16.06.02.02 - Pickett N1010-T Trig Brown leather case. Round Black Logo, curved braces, curved lens. To gallery.
  • 16.06.02.03 - Acumath 500 Round Braces
  • 16.06.02.04 - Acumath 1211 pocket slide rule. brown sleeve. Pre-acumath logo. To gallery. Replace P229
  • 16.06.02.05 - Pickett N902-ES Square Braces, Round black logo, extended cursor bars. Add to gallery
  • 16.06.02.06 - Sterling 587 pocket,
  • 16.06.02.07 - K&E 4090-3 sn 476471, no cursor with manual.
  • M352 - K&E 4090 manual. add to library
  • 16.06.02.08 - Acumath 400, for loaner program.
2016.06.21.01 - Received gift of slide rule books and manuals from Anita Hansen of New Milford, CT.
  • M353 - Basic Slide Rule Operation, W.S.Mittelstadt
  • M354 - Computing Devices, Webster Publishing
2016.06.21.01 - Received gift of Acumath 400 slide rule Wes Boyce of Fairport, New York, for loaner program. He used it in High School Physics 1968-69
2016.05.26.01 - Restored Early cursor for Deitzgen 1745 Maniphase Duplex Trig no sn. Used SIC cursor Blocks (redrilled and tapped) and one lens, used 5 min epoxy for spacing
2016.05.15 - Fundraiser - Received donation from Michael Sonnenblick.
2016.05.18.01 - Restored Early cursor for Deitzgen 1732 Maniphase Multiplex Decimal Trig Log Log sn510139
2016.05.15 - Fundraiser - Received donation from Steve Smith of Texas.
2016.05.15 - Fundraiser - Received donation from Phillip Rodley of New Zealand .
2016.05.13 - Fundraiser - Received donation from Giuseppe Bianchi of Italy.
2016.05.12 - UnitedStates - Added Gerber GraphAnalogue donated by Marie Sayre Cole of Wappinger Falls, New York.
2016.05.10 - Received a gift of slide rules and instruments from Marie Sayre Cole of Wappinger Falls, New York. Belonged to father Clifford L. Sayre, Jr. and Grandfather Clifford L. Sayre Sr.
  • 16.05.10.01 - Gerber GraphAnalogue Model GA-103 with manuals and case - Father
  • M347 - Gerber GraphAnalogue Model GA-103 manual
  • M348 - Gerber GraphAnalogue Model GA-103 Brochure
  • M349 - Gerber Variable Scale Brochure
  • M350 - Gerber Variable Scale TP007100 Manual
  • 16.05.10.02 - Dietzgen Phillips Slide Rule (C1914) missing cursor, mahagony well, no model No. Imprint - Grandfather
  • 16.05.10.03 - K&E 4080-3 sn352819 KERCS Dietzgen case Scale set #2 3rd variation Replace ISRM 12.04.23.01 - Father
  • 16.05.10.04 - Texas Instrument SR-52 Calculator sn050024 dc0876 with manual. Corroded batteries. untested.
  • 16.05.10.05 - Micronta proportional compass calipers
  • 16.05.10.06 - Dietzen set of 8 archetectural scales in mahagony box
  • 16.05.10.07 - Sterling Decimal Trig LogLog (for loaner program)
  • 16.05.10.08 - Perrygraf 1963 slide chart CEC Accelerometer calculator
2016.04.06.01 - Received gift of slide rules from Karen Miller of Ventura, California. Belonged to R.T. Miller
  • 16.04.06.01 - K&E 4081-3 Log Log Duoplex Decitrig sn402506. Has KERCS but was able to restore cursor. With intact brown sleeve.
  • 16.04.06.02 - K&E Doric N9081-3 Log Log Duoplex Decitrig sn23522. with black sleeve
  • M??? - Manual, K&E N4081-3 Log Log Decitrig, Owner R.T.Miller
2016.03.10.01 - Received gift of Rockwell 64D Slide Rile Calculator sn 103013.086 from Manny and Marti Leinz of Chino Hills, CA
2016.03.02 - Fundraiser - Received donation from Michael Mjelde
2016.02.29 - Received gift of slide rules, drafting tools and calculators from Deborah Brooks, Jackson, New Jersey, which belonged to her father J.J. Nelson, Western Electric
  • 16.02.29.01 - K&E 4081-3 LogLogDuplex Decitrig sn 267524 in box w/sleeve, manual and ephemera (no markings).
  • 16.02.29.02 - TI-59 Slide Rule Calculator sn0667001 dcATA0180 w/ master Library Modules (not tested, no battery damage)
  • 16.02.29.03 - TI-30Xa Solar Calculator INOP
  • 16.02.29.04 - 2 Sterling Slide Rules, for Loaner Program
  • N600-T Pickett Log Log Manual/Warranty. Has name: J.J. Nelson, Western Electric
  • 16.02.29.05 - K&E 4081-3 LogLogDuplex Decitrig sn487639 w/sleeve, manual
  • 16.02.29.06 - TI Mini Databank Calculator dc0887, manual
  • 16.02.29.07 - K&E 795-8 Minusa Drawing Set in box
2016.02.24 - Fundraiser - Received donation from Jose Gabriel Fernandez
2016.02.23 - EastEurope - Made corrections and added information on Gamma and Logar slide rules from Hungary.
2016.02.23 - United Kingdom - Made corrections on Otis King slide rules, per Dick Lyon.
2016.02.15 - SR Loaner - Sent 25 slide rules to the wrong school. :o(
2016.02.08 - United States - Added bio information about Joseph H. Gerber to the Gerber Scientific Variable Scale Slide Rule
2016.02.08 - SR_Terms/Encyclopedia - Added entries about Joseph H. Gerber and the Gerber Scientific Company
2016.02.07 - Received a gift of slide rules and ephemera from Ed of Odenton, Maryland.
  • 16.02.07.01 - Pickett Model 3 Deci-LogLog Vector Sn C028832 in Rubber sleeve. Name of owner: Logan Sturgis
  • 16.02.07.02 - K&E Decilon 68-1100 sn 090416 in Leather sleeve, cracked flap. Name on slide rule and sleeve: Lynn Lucky
  • 16.02.07.03 - Post Versalog dc M.A. (Jan1962) Green COS label, sn300444, in leather sleeve. Name on sleeve: R.J.Jax???
  • M356 - Textbook, "The Complete Slide Rule Handbook, Principles and Applications" by J.N.Arnold, Purdue University, ©1954 Prentice-Hall
  • M357 - Textbook, "Basic Slide Rule Operation", by W.S. Mittelstadt, Eastman Kodak Company, © 1964 McGraw Hill
  • M358 - Textbook, "Practical Use Of The Sliderule" by Calvin C. Bishop, Copyright 1947 Barnes & Noble
  • M359 - Book, Reprint "A History of the Logarithmic Slide Rule" by Florian Cajori, 1909. 1994 Astragal Press.
  • M360 - Reference Book "K&E Salisbury Products Division Slide Rules" by Joseph L. Soper, Oughtred Society Publication
  • M361 - Reference Book "Calculating With TonesLogic of Music, The Logarithmic " by Klaus Kuehn and Rodger Shepherd, Oughtred Society Publication
  • M??? - Manual, Pickett "Elementary Simplex Math Slide Rule" by Maurice L. Hartung 1965
2016.01.30 - Fundraiser - Received donation from Adam Coleman, now a Friend of the Museum.

2015.12.14 - Fundraiser - Received donation from Kent Berglund, of Illinois.
2015.12.06 - Received gift of Acu-Math 400, for loaner program, from Michael Bobick.
2015.12.05.01 - Received gift of Pickett 52T Type-A1 Arial Photographic Data MIL-C-4318A from Steve Wilkie, Sacramento, California.
2015.11.18 - Pickett - Added Pickett N901-T Simplex, belonging to Naval Aviator Charles E. Rash (1918-1989).
2015.11.18 - Hemmi - Added Hemmi 251 for Mechanical Engineers, belonging to Naval Aviator Charles E. Rash. (1918-1989)
2015.11.18 - Circular and Aerospace - Added Felsenthal MK-8-B Flight Computer, belonging to Naval Aviator Charles E. Rash. (1918-1989)
2015.11.17 - Graphoplex - added Caltex Oil Viscosity Slide Rule, gift of kenneth Eyre, of the UK.
2015.10.26 - Received donation from Rod Lovette, UK.
2015.11.03 - Received gift of slide rules belonging to Randy Rash's father, Chuck Rash. (1918-1989)
  • 15.11.03.01 - Hemmi 251 (For Mechanical Engineer) dcKJ (Oct1960). in a US Army Load Adjuster sleeve
  • 15.11.03.02 - US Army Air Forces Load Adjuster Sleeve
  • 15.11.03.03 - Pickett 901-T Simplex in black naugahyde sleeve.
  • 15.11.03.04 - Felsenthal MK8B Aviation Computer US Navy
2015.11.01 - SR_WhosWho - Added Michael Scheffert (1652-1720), the earlist and most important maker of mathematical instruments in Germany. Information by Werner Rudowski.
2015.10.26 - Received donation from Karl Kleine, Germany.
2015.10.18 - Received donation from Danial Trousant www.linealis.org
2015.10.13.01 - Received gift of slide rules belonging to Randy Rash's fatherChuch Rash.
2015.10 - FundRaiser - Received donations Jeremey McCarthy, Karl Klein, Rodney Lovett
2015.09.25-27 - Attended IM2015 in Burlingame, California. Obtained several new specimens from the Tom Wyman Collection and other offerings.
  • 15.09.27.01 - Regolo Di Convergenza, Mo Mattei, Relazione Fra Angoli Sessagesimali E Millesimali (Artillery) gift of Nicola Marras. (Slide rule for convergence for the artillery The straight edge movable from a door side trigonometric values ??and other corrections for the convergence)
  • 15.09.27.02 - Gilson Atlas Calculator Patent 1-17-1922, Copyright 1931
  • 15.09.27.03 - A.W. Faber with Decimal Keeper Circa 1897-1906
  • 15.09.27.04 - Pickett N700-T Type A-2 USAF Photographic Slide Rule Gift of Walter Shawlee
  • 15.09.27.05 - K&E 4076 Duplex Trig c1913
  • 15.09.27.06 - Halden Calculex Pocket watch calculator
  • 15.09.27.07 - Gebr. Wichmannn, Berlin Pocket watch calculator Ref:DG-2
  • 15.09.27.08 - Fowler's Textile Calculator Ref:DG-7
  • 15.09.27.09 - Scientific Publishing Company, Manchester, England Pocket watch calculator
  • 15.09.27.10 - K&E Sperry's Calculator, Pocket watch calculator
  • 15.09.27.11 - Calculgraphe H.C., Pocket watch calculator
  • 15.09.27.12 - French Sector, Early Brass. Ref:David Stanley Auctions #852
  • 15.09.27.13 - K&E 4095-3 Merchant Rule sn322686 Magnifying Cursor
2015.08.29 - Received gift of slide rules, drafting tools and calculators from Marilyn (Stobbs) Ulrich, of 0'Fallon, Missouri.which belonged to her husband, George W Ulrich (1938-2015), who work at McDonald.
  • 15.08.29.01 - K&E 4080-3 LogLogDuplexTrig sn508088 w/manual (Repaired Cursor).
  • 15.08.29.02 - K&E 9061-1 Doric sn5761 w/4161 manual, green sleeve. To gallery with photo and bio
  • 15.08.29.03 - Futura 509 Ruler, clock & Solar Calculator, GM branded black sleeve
  • 15.08.29.04 - Engineering Instruments, no model number, Red CI scale. "Marylin Stobbs" written in well.To gallery with manual
  • 15.08.29.05 - Post 1460 Versalog (green COS) dcPD (April 1965) with manual
  • 15.08.29.06 - S.I.C. (Scientific Instrument Corp.) 250 circular Professional slide rule, Patent 440028, 130076. add to gallery Variant of C35
  • M347 - K&E 4161 Slide Rule Manual. Red/grey cover. To be scanned.
  • M355 - K&E 4161 Slide Rule Manual. Red/grey cover. To be scanned.
2015.08.20 - 2014-2015 Fund Raiser - Received 46% of goal from 25 Friends of the Museum.
2015.08.20 - SR_Library - Library downloads are now available as school is back in session. A dissapointing fundraiser as only 46% of our goal was reached. We still have until the end of the year.
2015.08.13.01 - Received gift of The Lightning Calculator, The Calculator Corp. Grand Rapids, Mich (1921-1940). from Phillip Rodley, Upperhutt, New Zealand.
2015.08.16 - FundRaiser - Received donation from Richard Broman
2015.08.13 - Received gift of slide rules, drafting tools and calculators from Deborah Brooks, Jackson, New Jersey, which belonged to her father J.J. Nelson, Western Electric
  • 15.08.13.01 - K&E 4081-3 LogLogDuplex Decitrig sn 267524 in box w/sleeve, manual and ephemera (no markings).
  • 15.08.13.02 - TI-59 Slide Rule Calculator sn0667001 dcATA0180 w/ master Library Modules (not tested, no battery damage)
  • 15.08.13.03 - TI-30Xa Solar Calculator INOP
  • 15.08.13.04 - 2 Sterling Slide Rules, for Loaner Program
  • N600-T Pickett Log Log Manual/Warranty. Has name: J.J. Nelson, Western Electric
2015.08.16 - FundRaiser - Received donation from Gwendolyn Patton
2015.08.07 - FundRaiser - Received donation from David Guthrie
2015.08.01 - SR_WhosWho - Added Nelson M. Cooke (1903-1965), Designer of the Cooke Radio Rule
2015.07.30 - FundRaiser - Received donation from Marion Moon
2015.07.20 - Received gift of slide rules from Nick Kratz, Pasadena, California
  • 15.07.20.01 - Halden Calculex Eugene Dietzgen Agents. Broken lens on one side. Two manual in leather sleeve.Add to Gallery
  • ISRM M367 - Halden Calculex Eugene Dietzgen Agents.
  • 15.07.20.02 - K&E 4041 lot 211, with metal framed cursor.Missing lens, Made by D&P? Initial J.K.B. on slide. Add to Gallery
  • 15.07.20.03 - K&E 4092 with All Glass Cursor. Lot 3. Name engraved on stock: R.W. Kratz. Add to Gallery
  • 15.07.20.04 - Aristo 89 Pocket Rietz, dc,G6128, Hugh Semiconductor Promo (repaired)
  • 15.07.20.05 - Sterling 584 For adoption.
  • 15.07.20.06 - Hughes Program Business Management Development Ruler, calculator clock. Clock missing cover, Solar Calc works. For adoption.
  • 15.07.20.07 - Diwa_No601-1_Fansteel Promo
  • M346 "Slide Rule", Revised 1942, Pasedena Junior College.WWII era. Typewritten text book.
2015.07.20 - 2014-2015 Fund Raiser - Received 33% of goal from 20 Friends of the Museum.
2015.07.11.01 - Received gift of rare Faber-Castell 310/83N, overhead projector slide rule (for 2/83N) from Ralph Stern, Ann Arbor, Michigan. He bought it at an office supply store in London Ontario about 1990.

2015.07.07 - Received gift of two slide rules from Steve Stewart, Lafayette, Colorado..
  • 15.07.07.01 - K&E 4081-3 sn830160 Decitrig, Name "R.L.Stewart" etched in braces. KERCS. Pristine Leather sleeve.with instructions. For Adoption.
  • 15.07.07.02 - Pickett&Eckel Model 2, Deci Log Log Magnesium , snC026739, in rubber sleeve, with instructions. Replace S052.
2015.06.25 - Received gift of two rare slide rules from Phillip Rodley, Upperhutt, New Zealand.
  • 15.06.25.01 - J.A.Nicholl & Co., London, APP OBS CF Fire Slide Rule MK VI. 1917. All metal
  • 15.06.25.02 - Dring & Fage, London. Customs and Excise.DP312. Jan '62 (1862). Two'Foot Boxwood
2015.06.25 - Adoption - Shipped 5 slide rules to suppporters.
2015.06.25 - Back from vacation. Lots of catching up to do.
2015.06.22 - Received gift of slide rules from Jim K. Neathery of Lexington, Kentucky.
  • 15.06.22.01 - Charles Bruning 2420 in box with Pristine Leather sleeve and Instructions. For Adoption.
  • 15.06.22.02 - Acu-Math No.400 with sleeve. For SR Loaner program.
  • 15.06.22.03 - Dietzgen No.1757 Primatrig. For Adoption.
  • 15.06.22.04 - Engineering Instruments 10B in blue and yellow retail sleeve. For gallery
  • 15.06.22.05 - Engineering Instruments 10B in blue and red retail sleeve. Name on back of SR: W.S.Elrod. For gallery
  • 15.06.22.06 - Post 1447 Mannheim. dcJE For S.A.
2015.06.17 - Received gift of slide rules from Ellen Hathaway ofIndian Head Park, Illinois..
    15.06.17.01 - K&E 4058W Beginner's Slide Rule . For Adoption.
  • 15.06.17.02 - K&E 4088-3 sn137431. Replace S438. needs all glass cursor.
  • M345 K&E Polyphase Duplex Trig No. 4070 Slide Rule Manual copyright 1939
2015.06.03.01 - Received gift of K&E 4053-3 Lot 17 slide rule from Ann Morton, Lakewood, Colorado. Belonged to father Henry Stuart Morton 1908-1964. With photo
2015.06.03.02 - Received gift of Relay No. 505 dc E.K-4 slide rule from Lynne Powell, Lakewood, Colorado. She used it at Broomfield High School between 1967-1970
2015.05.31 - KE_Standard - Updated Biographical information on Gregory Patterson. K&E 4081-3 sn824972. Added movies of his trains.
2015.05.30 - Start of annual fund raiser. Library is disabled now that school is out. Will be back on line when goal is reached.
2015.05.21 - Nestler - Revised introduction. Added 1908-1911 Model 23.Scan by Thomas Bahr
2015.05.21 - SR_Dates - Added Albert Nestler Timeline.
2015.05.20 - SR_Library/UnitedStates - Added Instructions (ISRM M345): Special Slide Rule For Natural Gas and Air Computations copyright 1910 by Forrest M. Towl. Gifts of grandson, Theodore Towl.
2015.05.20 - Rarities/Towl - Added more research on Forrest M. Towl. Added 3 slide rules. Gifts of grandson, Theodore Towl.
2015.05.16 - Rarities/Towl - Added web page on Forrest Milton Towl, Proffesor.
2015.05.15 - Received ephemera related to Forrest M. Towl Piping Slide Rules, gifted by Grandson Ted Towl.
2015.05.15 - Patents/DE - Added Nestler patent DE173660C July 27, 1906 Rechenstab by Albert Nestler
2015.05.14 - Received gifts of 28 Sterling #589 Mannheim slide rules for the South Africa Scool. Gifted by Otto Van Polje, in the Netherlands.
2015.05.13 - Received gifts of 3 Kirby & Bro. NY, maker of Forrest M. Towl Piping Slide Rules, gifted by Grandson Ted Towl.
2015.05.12 - Informed that Colin Barnes in the UK has shipped the following 25 plastic SR's for the South Africa Project ( * Indicates captive cursor, B indicates box):
  • 15.05.12.11 Jakar 1011 LogLog Add to archives
  • 15.05.12.20 Jakar 99 L/L Duplex. with insert. green/white case. Add to archives
  • 15.05.12.03 Nestler 0239 Reitz, dc 68 (1968), add to archives
  • 15.05.12.04 Aristo Scholar 0903LL dc G6237 (1962) with instructions retail sleeve add to archives Replace S202
  • 15.05.12.01 Aristo 99, dcG596 (1959) with insert, sticky cursor. add to archives
  • 15.05.12.22 Aristo Studio 0968 Duplex. Pads on one side. V2C dc6031 Cardboard sleeve. Owner:R.G. Arnold. add to archives
  • 15.05.12.23 Aristo 970 MultiLog Variant, dc608. Cardboard sleeve. Cracked cursor. Owner J. Fehlmann. Add to archives
  • 15.05.12.24 Aristo 970 MultiLog Variant, dc577. Cardboard sleeve.. Add to archives
  • 15.05.12.01 Aristo 0901 dcWFX25 (1969), plastic case, Made in Austria. Add to archives
  • 15.05.12.12 Blundell B.R.L. Academy 300. Blue/clear vinyl sleeve. Add to archives
  • 15.05.12.13 Blundell B.R.L. Academy 303 Reitz. Blue/clear vinyl sleeve. Add to archives
  • 15.05.12.17 Blundell B.R.L. Academy 304 Darmstadt.LogLog. Add to archives
  • 15.05.12.19 Blundell Harling 804 Duplex LogLog. w/instructions Add to archives
  • 15.05.12.18 Blundell 803 Reitz. Yellow braces. Blue plastic case. Add to archives
  • 15.05.12.05 Faber-Castell 57/87 dc473. 25cm scale. Made in Switzerland. Green/White plastic sleeve. Add to archives
  • 15.05.12.06 Faber-Castell 57/87 dc566 10inch scale. Made in Germany. Clear plastic sleeve. Add to archives
  • 15.05.12.07 Faber-Castell 52/82 D-stab. LogLog dc3. Wide cursor. Made in Switzerland. Green/White plastic sleeve. Replace S242
  • 15.05.12.08 Faber-Castell 52/82 D-stab. LogLog dc3. Narrow Cursor. Made in Switzerland. Clear plastic sleeve. Add to archives
  • 15.05.12.21 Faber-Castell 57/89 Darmstadt dcO71 (1971) Made in Austria. gray plastic case. Add to archives
  • 15.05.12.10 Hemmi P280 LogLog dcVF (June1971) Cracked Cursor. Blue/White case. Add to archives
  • 15.05.12.15 Hemmi P280 LogLog dcYA (Jan1974) Blue/White case. Add to archives
  • 15.05.12.09 Hemmi P281 dcUK (Nov1970) No Case. For loaner
  • 15.05.12.14 Hemmi P281 dcVB (Feb1971) Blue/White Case. For loaner
  • 15.05.12.16 Ahrend Hemmi P283 LogLog dcUG (Jul1970) Blue/White Case. Add to archives
  • Jakar 1031 Not received
  • Blundell 306 Not received
  • Blundell 302 Not received
2015.05.11 - Received gifts of 13 slide rules for South Africa Schools, from Don DiGalbo .
  • 1 Acumath No. 400B
  • 1 Acumath No. 600 Basic Trig with manual and box
  • 1 Acumath No. 150 Log Log Decimal Trig with manual and box. Slide is stuck to stock. Unusable. 3 layer vinyl, center layer is black
  • 1 Acumath No.1311 Log Log,Vinyl laminated on Magnesium Stock (All Metal)
  • 1 Acumath No.1240 Pocket, white braces, early w/o oval logo, in retail box, with manual and sleeve (no trig scales)
  • 1 Acumath No.1200 Pocket, black braces, in retail box, with manual and sleeve (with trig scales)
  • 1 Acumath No.1211 Pocket, metal braces, in retail box, with manual and sleeve (with trig scales)
  • 1 Pickett Trainer, 121 (narrow Stock)
  • 1 Pickett Trainer, 120 (narrow Stock, black braces), manual and box.
  • 2 Sterling 594 Log Log - To Loaners
  • 2 Sterling 584 Mannheim (1 2-bridge, 1 5-bridge)

  • total 13, 8 to South Africa
2015.05.11 - Received gifts of 5 slide rules for South Africa Schools, from Rich Vigil. of Damascus, Maryland.
  • 1 Acu-Math 500
  • 1 Pickett 125-T (Microline wide stock),
  • 1 Acumath No. 400
  • 1 K&E 4158 K-12 Prep
  • 1 K&E 4181-3 All Plastic Decitrig, sn024987
    total 5, 3 to South Africa
  • 2015.05.09 - Received gifts of 45 slide rules for South Africa Schools, from Dick Rose of Rose Vintage Instruments, Ohio.
    • 2 Dietzgen 1767 National
    • 1 Dietzgen 1739-L Clear-Scale. Add to Gallery Ref: 15.09.05.05
    • 1 K&E 4181-3 Log Log Duplex Decitrig. All plastic. sn354695, To Adoption Ref: 15.09.05.02
    • 1 K&E 4081-3 Log Log Duplex Decitrig. sn530836, To Adoption Ref: 15.09.05.01
    • 1 K&E 4081-3 Log Log Duplex Decitrig. sn082981, has Kercs Scrap
    • 1 K&E N9081-3 Doric Log Log Duplex Decitrig. sn19756, corroded braces Ref: 15.09.05.08 replace ISRM 11.11.23.01 sn53602
    • 19 Pickett 80,120 Trainer,120 (narrow Stock), 120-T, 120-ES, 121-T (Microline wide stock),
    • 4 Pickett 140-T/ES Log Log (Microline wide stock), To SR Loaner Set
    • 3 Post/Hemmi 1447, 40RK
    • 1 Acu-Math 511 Mannheim Professional, Laminated over magnesium
    • 7 Pickett (N)902-ES/T Simplex Trig. To SR Loaner Set (now has 24 SR's need 25 total)
    • 1 Pickett N803-ES Simplex Trig, To Adoption Ref: 15.09.05.03
    • 1 Pickett N-500-ES Hi Log LogTrig, To Adoption Ref: 15.09.05.04
    • 1 Hemmi P40RK, Add to Gallery Ref: 15.09.05.06
    • 1 Hemmi 40RK, dcTA (Jan 1969) unopened sleeve, Added to Gallery Ref: 15.09.05.07
      total 45, 37 to South Africa
    2015.05.08 - Received Gift od Post 1447 Mannheim for South Africa, from Janet Patterson, Madison, North Carolina
    2015.05.08 - Received Loaner slide rules back from NV Fitton, Alexandria, Virginia.
    2015.05.02 - Math Instruments for South Africa. ISRM has committed to provide a gift of 200+ slide rules for a school in George, S.A., There will be a follow-on drive to acquire solar powered calculators as well. Contact Mike Konshak, if you are able to help.
    2015.05.01 - Rarities - Added to 4 foot D&F Gauging Rule the paper: Gauging: the art behind the slide rule by Tom Martin of the UK.
    2015.05.01 - Pickett - Added 1954 Model 1010-T in retail box with Manual. Gift of Randy Shrimplin, Okeechobee, Florida.
    2015.05.01 - Dietzgen - Added(Replaced) Dietzgen 1752P 20 inch - Maniphase (L05), gift of Ed Millis, Dallas, Texas
    2015.05.01 - SR_Library/Catalogs - Added two Pickett & Eckel pocket catalogs from 1950, and 1954. One distributed by Charles Bruning Co.
    2015.05.01 - SR_Intro - Added pictures of Becky and Deacon with equipment used in the archiving center of ISRM
    2015.05.01 - SR_Library/Catalogs - Added A. Lietz Company catalogs from 1893, 1897, 1909, and 1938. Also separated out the slide rule pages.
    2015.05.01 - United States - Added Lietz logo and links to 1893, 1897, 1909, and 1938 catalogs.
    2015.05.01 - Nestler - Corrected date on Albert Nestler A-G, LTD to 1923. Thanks to Marion Moon (California) and Otto van Poelje (Netherlands)
    2015.04.27 - Rarities - Added Henry & Company Coggshall Engineer's Joint Rule, gift of Phillip Rodley, Upperhutt, New Zealand.
    2015.04.27 - Lawrence - Added OEM Lietz model 2976 (Lawrence 10-B ).
    2015.04.27 - United States - Updated image of Lietz model 2976 (Lawrence 10-B).
    2015.04.27 - Rarities - Added(Replaced) Fowler's "Jubilee Magnum" Extra Long Scale Calculator from UK
    2015.04.26 - Rarities - Added 4 foot Dring and Fage Gauging slide rule, gift of Phillip Rodley, Upperhutt, New Zealand.
    2015.04.26 Oughtred Society - Mike Konshak, ISRM Curator, is now on the OS board and is the United States representitive for the OS Awards Committee.
    2015.04.25 - United States - Added two models (1938 and 1943) of D.Van Nostrand Mannheim Type Slide Rules with comparisons. The accompaning book Speed and Fun with Figures will take some time to scan as consists of 3 books and is 600+ pages long. The research on this company took 3-4 days to complete.
    2015.04.24 - Pickett - Added No N-531-ES CREI Round Black Logo, Round CREI Logo, gift of Jay of Washington, D.C.
    2015.04.24 - Acumath - Added(Replaced) No1500 Log Log Decimal Trig, gift of Jay of Washington, D.C.
    2015.04.24 - Holiday - There are other things in life besides slide rules. Back from riding motorcycles in Moab Utah. See www.youtube/c/telerover for videos
    2015.04.17 - Received gift of two slide rules, with photo and bio, belonging to Jay of Washington, D.C.
    • 15.04.17.01 - Pickett No.120 white narrow stock.
    • 15.04.17.02 - U.S. Acu-math No.1500 Log Log Decimal Trig.
    2015.04.06.02 - Acquired Lietz model 2976 (Lawrence 10-B).
    2015.04.06.01 - Received gift of Post Versalog 1460,(black COS) slide rule. dc GK (Nov1956) sn711291, gift of Monica Orban, Westby, Wisconsin
    2015.04.03.01/M343 - Acquired D. Van Nostrand Co. Mannheim Slide Rule (clear cursor) with book (1938)(M344) Speed and Fun With Figures by Sloan, Thompson & Licks.(1922). Belonged to Theodore A Ziegler who bought it in 1947. Monica Orban, Wisconsin
    2015.04.03.02/M342 - Acquired D. Van Nostrand Co. Mannheim Slide Rule (magnifying cursor) with book (1938) Speed and Fun With Figures by Sloan, Thompson & Licks.(1922).
    2015.04.03 - Ephemera - Added 4 ads from Popular Mechanics and Popular Science magazines from 1939-1943, D. Van Nostrand Slide Rule.
    2015.04.03 - United States - Added D.Van Nostarnd Circular Slide Rule and Mannheim Type Slide Rule.
    2015.04.03 - United States - Added new manuafacturer's catagory D.Van Nostrand with supporting history.
    2015.04.03 - KE_Standard - Added 4081-3 sn824972 laminated edges. Belonged and used by Gregory J. Patterson (1935-2014) who worked as a mechanical Engineer at Westinghouse. Gifted by son Tim Patterson and family.
    2015.04.02 - Pickett - Added(Replaced) Model No.120 white narrow stock.. Belonged and gifted by Larry Hodes of New Jersey
    2015.04.02 - PIC/Thornton - Added Model No.251. Belonged to Gerard H. Holzrichter (1912-1979) Gift of Larry and Enid (Holzrichter) Hodes, New Jersey
    2015.04.02 - Received gift of two books from Jennie Miller, Dulan Village, Dong He Township, Tartung County, Taiwan
    2015.04.02 - Ephemera - Added photo of a Pipe Smoking Student With Slide Rule. Based on the sleeve the maker is probably a K&E. (found on Etsy)
    2015.04.01 - SR_Library/Catalogs - Added A. Lietz Company catalogs from 1911, 1919 and 1926. Also separated out the slide rule pages.
    2015.04.01 - United States - Added Lietz models 2974N (made by Hemmi and 3625-10 Dial Rule (Pickett 101-C). Ebay photos. Added Lietz logo and links to catalogs.
    2015.04.01 - SR_WhosWho - Added Adolf Lietz (1850-1923) who founded the A. Lietz Company, that manufactured surveying equipment and rebranded slide rules.
    2015.04.01 - United States - Added Lakeside Toys Draft-A-Plan Kit with Pocket slide rule.
    2015.04.01 - SR_Library/USA - Added Drafting For Fun included with Lakeside Toys Draft-A-Plan Kit.
    2015.03.28 - Received a donation from Thomas Hazard, now a Friend of the Museum.
    2015.03.28 - Received 2 slide rules, one used by Larry Hodes (Laurent V. Hodes), and the other by his wife Enid's father Gerard Holzrichter (Thornton). Larry and Enid live in Tacoma Park, Maryland.
    • 15.03.28.01 - Pickett No.120 white narrow stock.
    • 15.03.28.02 - Thornton PIC No.251
    2015.03.24.01 - Acquired D. Van Nostrand Co. Circular Slide Rule, Copyright 1932. Made of cardboard.
    2015.03.23.01 - Received donation of K&E 4081-3 sn824972 laminated edges. Belonged and used by Gregory J. Patterson (1935-2014) who worked as a mechanical Engineer at Westinghouse. Gifted by son Tim Patterson and family.
    2015.03.21 - Received a donation from Wayne R Pinnow, now a Friend of the Museum.
    2015.03.19.01/M341 - Acquired Lakeside Toys Draft-A-Plan Kit, with Slide Rule (made by Lawrence) and Drafting Tools, Electric Drawing Board and Instructions. From Local Estate.
    2015.03.18.- Military and Circular - Added US Navy Calculator For Vertical Aerial Photography, MIL-C-19729 (Fesenthal).Gift Of Aron Davidson.
    2015.03.18 - Received gift of 2 Aerial Photography slide rules belonging to Gift Of Aron Davidson, New Jersey
    • 15.03.18.01 - US_Navy Calculator For Vertical Aerial Photography MIL-C-19729,
    • 15.03.18.02 - Pickett 520-T Aerial Photo Slide Rule.(for adoption)
    • Manual How To Use The U.S. Air Force Aerial Photo Slide Rule. (for adoption)
    2015.03.17 - Rarities - Added Replica of Napier's Bones donated by the German Rechenschieber Sammler Treff (RST) Collector Group and Klaus Kühn.
    2015.03.10 - Pickett - Added pictures of Retail Displays and artwork plates used in production. Photos courtesy of Gary Rourke
    2015.03.10 - Manuals/Ditzgen - Added ISRM_M339 Dietzgen N1725 VectorLogLog Instructions Gift Of David DeSpain
    2015.03.09 - Ephemera/People with slide rules - added 7 new images, including one of donor Phillip Rodley
    2015.03.09 - Military - Added DeYOE Slide Rule, U.S. Army for Artllery Ranging, Scan donated by David Rance collection. Sassenheim, The Netherlands
    2015.03.09 - Lawrence - Added DeYOE Slide Rule, U.S. Army for Artllery Ranging, and updated paper The Unique Lawrence both provided by David Rance collection. Sassenheim, The Netherlands
    2015.03.09 - Dietzgen - Added(Replaced S114) Model N1725 sn130952 Microglide Vector Type Log Log Gift Of David DeSpain, Columbus, Ohio, with b io and photo.
    2015.03.09 - Finished scanning all slide rules waiting in the que. Will now brgan the process of editing and posting the images.
    2015.03.09 - Pickett - Added Pickett N-500-T HI-LogLog RndBlkLogo Gift Of Ed Millis
    2015.03.06.01 - Acquired Fowler's "Jubilee Magnum" Extra Long Scale Calculator from UK
    2015.03.05.01 - Received gift of Dietzgen 1752 20inch Maniphase with all glass cursor. Gift of Edward , Odenton, MD.
    2015.03.04 - Received gift numerous slide rule books and manuals from Edward , Odenton, MD.
    2015.02.28.01 - Acquired Post 1452H MIOJ to use cursor for a Hemmi 251. Placed a Ricog curso on this specimen, and put it up for donation.
    2015.02.27 - Received gift of 2 slide rules belonging to David Barnishin of Columbus, Ohio. David won these slide rules in a poker game in 1960 while a student at Indiana State University in Terre Haute, Indiana. (1957-1961). He majored in Math and Physics.
    • 15.02.27.01 - Post 1460 Versalog dcHH (Aug 1957), with hard bound instructions. Put in loaner program.
    • 15.02.27.02 - Pickett 800-T Log Log red and black text, round black logo, square braces. c1959 Replace S066
    2015.02.25.01/M339 - Received gift of Dietzgen N1725 Vector Type Microglide Slide Rule sn130952, in box with manual from David R. DeSpain, P.E.of Fort Worth, Texas. with bio and photo. Gift includes various slide charts.
    2015.02.24.01 - Received gift of K&E Decilon in original box from The Association for NonSmokers in Minnissota which was donated to them by Bernhard Marzell
    2015.02.23.01 - Received gift of 4 foot Dring and Fage Gauging Rule acquired by Phillip Rodley, Upperhutt, New Zealand.
    2015.02.23.02 - Received gift of Henry & Company, Joint Rule acquired by Phillip Rodley, Upperhutt, New Zealand.
    2015.02.18 - SR_WhosWho - Added Murray I. Lieb, Associate Professor of Mathematics at New Jersey Institute of Technology. He edited the Instruction Manuals for Sterling Plastics.
    2015.02.18 - Received gift of personal slide rules from Randy Shrimplin, Okeechobee, Florida.
    • 15.02.18.02 - Pickett 101-C with manual. for adoption
    • 15.02.18.01 - Pickett 1010-T Trig Triangle logo, rounded braces, cursor grooves on outside of stock, with manual
    • M340 - 1954 Foirm 165 Pickett Pockett Catalog
    2015.02.01 - Recieved donation from Marnie Shepperd, Arizona, a Friend of the Museum on the anniversary of her father's death. Parker D. Shepperd's slide rule is in the K&E gallery.
    2015.02.07.01 - Received gift of Sterling #694 Decimal Trig Log Log and manual M237 from Bruce Blackstone.
    2015.01.31 - SR_Ephemera - Added German postage stamp commemerating 400 years of logarirthm and John Napier. Courtesy of letter sent by Klaus Kühn
    2015.01.31 - SR_Loaner - Sent 25 slide rules to Dr. Justin Young, Department of Mathematics and Computer Science, Ashland University, Ashland, Ohio.
    2015.01.27 - Visitation, Mike visited George Keane in Festus, Missouri, while on a road trip to the area. George wrote the history on Acu-Rule (Acu-Math) slide rule company which started in his home town. He also supplied the first slide rules for the ISRM Loaner program. George suffers from Parkinson's Disease which makes it difficult for him to use a computer.
    2015.01.25 - Recieved donation from Michael Fink, Australia, now a Friend of the Museum.
    2015.01.23 - SR_Loaner - Sent a variety of 25 slide rules to N V Fitton,Mathematics & Computer Science Northern Virginia Community College, Alexandria, VA
    2015.01.23 - SR_Loaner - Sent 8 slide rules to Sloan Despeaux, Department of Mathematics and Computer Science, Western Carolina University, Cullowhee, NC
    2015.01.14 - Lawrence - Added(Replaced) Lawrence 10-B white back (S386), Lawrence 10-B wood back Full length silkscreen on back New variation., RCA F.M. Coverage Calculator, Gifts of Ed Millis
    2015.01.13 - Post - Added Frederick Post No.1452T, made by Sun Hemmi, c1935. Gift of Ed Millis.
    2015.01.12 - Acumath - Added "Acu-Rule" Universal. Same as Frederick Post 1452-D Universal c1945. Added Letterhead to top of page.
    2015.01.08 - Acumath - Added(Replaced) "Acu-Rule" 10-D w/ magnifying Cursor, Model 50, No 401 Student mannheim, No 1311 LogLog Decimal Trig(S134), NO.500 (S139), No. 600 Basic Trig (S482), No.900 Professional (S136).
    2015.01.08 - Post - Added Frederick Post 1452-D Universal c1945, gift of Ed Millis, Dallas, Texas.
    2015.01.07 - Hemmi - Added No.130W Advanced Darmstadt, No.135 Darmstadt, and No.136 System Darmstadt. Scan provided by Olivier Cassou Collection, France
    2015.01.05 - SR_WhosWho - Added Alex E.S. Green (1920-2014) to gallery.
    2015.01.05.01 - Found undocumented Acumath 401 Student Mannheim Trig. Originally gifted by George Keane as part of slide rule loaner program.
    2015.01.05 - SR_Loaner - Sent 9 Nestler Elemath RS's to David R.(Randy) Sullivan,Senior Instructor, Department of Chemistry and Biochemistry, University of Oregon.
    2015.01.05 - SR_Rescue - Aaron Cowley adopted an Aristo 969.
    2015.01.02 - Scanning new manuals and books
    • ISRM_M335 - DelmarPublishers_TheSlideRuleShortcutToTrigonometry1970
    • ISRM_M336 - RobertBlaaine_TheSlideRule_QuickAndEasy_1907
    • ISRM_M337 - Halsey_TheUseOfTheSlideRule_VanNostrand_1907
    • ISRM_M338 - Saxon_Alexander_TheSlideRule_SelfInstructionProgrammedManual_Prentice-Hall_1966

    2014.12.26 - SR_Loaner - Sent 25 Aristo 903's to Jane Bryan,South Carolina Governor's School for Science and Math (GSSM), Hartsville, SC. for a seminar taught by John Webb.
    2014.12.15 - Most of December was spent scanning slide rules and manuals. Editing and posting pictures will commence in the next few days.
    2014.12.09 - Received gift of Deitzgen 1767 National with wrapped cursor from Janet L. Dubane of Barnegat, NJ
    2014.11.18 - Ephemera - Added photos of Alameda Naval Air Station Lapel Pin and a 'Man Cave' with Giant Slide Rule.
    2014.11.17 - Japan - Added Jakar 11 Pocket Rietz. Gifts Of Edward
    2014.11.17 - Nordic - Added UTO No. 601 w/Yellow Slide. Diwa 601 Rietz V1. Gifts Of Edward
    2014.11.17 - Pickett - Added Pickett 160-ES Made in Mexico variant, N600-T LogLog in Apollo box. Gifts Of Edward
    2014.11.17 - MiscJapan - Added Jakar pocket Mannheim (no model number) with sleeve. Gift Of Edward
    2014.11.17 - Sterling - Added Sterling 594 Decimal Trig Log-Log (FontVariant) and sleeve with model number on it. Gift Of Edward
    2014.11.16 - KE_Standard - Added 4088-3 belonging to Merle H. (Mike) Walker (1911-2013) who was one of the most important gun and cartridge designers of the 20th Century. Gifted by his daughter Janet Walker DuBane.
    2014.11.16 - SR_Library/Europe - Added Aristo Scholar Instructions ©1958 for Models 0903, 0903LL, 0903 VS, 0903 VS-2. Gift Of Edward , Odenton, Maryland
    2014.11.15 - SR_Library/Books - Added M322 The Slide Rule for Ships Officers 1949 by J.C. Podmore. Gift of Phillip Rodley.
    By T.G.C. Ward and G.W. Blakely. Gift of Phillip Rodley.
    2014.11.15 - SR_Library/Books - Added M314 The Slide Rule for Students of Science and Engineering 1955 By T.G.C. Ward and G.W. Blakely. Gift of Phillip Rodley.
    English Universities Press
    2014.11.15 - SR_Library/Dietzgen - Added M323 Dietzgen Maniphase (for 1767 National) Instructions. Gift of Phillip Rodley.
    2014.11.15 - SR_Library/Japan - Added M324 Sun Hemmi Bamboo Slide Rule 1947. Gift of Phillip Rodley.
    2014.11.15 - SR_Library/Japan - Added M328 Hemmi 153 Electrical Universal Instructions and M325 Hemmi 153 Special Scales Instructions. Gift Of Edward
    2014.11.15 - SR_Library/British - Added M318 Boots Ringplan 10inch Slide Rule Instructions.Gift Of Edward , Odenton, Maryland
    2014.11.15 - Relay/Ricoh - Added placeholders for Lutz Models 151, 153, and 551
    2014.11.15 - SR_Library/Japan - Added M317 Lutz Models 151, 153, 252, 551 Instructions. Gift Of Edward , Odenton, Maryland
    2014.11.14 - SR_Library/British - Added M331 Unique "Half-Hour" Slide Rule Instructions.
    2014.11.12 - SR_Library/Pickett - Added M320 Pickett N525-T Stat-Rule Instructions. Gift Of Edward , Odenton, Maryland
    2014.11.12 - Nestler - Added Nestler 11E Electro,(missing cursor). Gift Of Edward , Odenton, Maryland
    2014.11.12 - SR_Home - Added banner on the 100th anniversary ofthe completion of the Panama Canal in 1914, designed using K&E slide rules.
    2014.11.12 - SR_Library/Books - Added book Slide Rule in Electronics John Carper ©1967 by Howard Sams. Scan Donated By Steven Decker
    2014.11.12 - SR_Terms/Encyclopedia - Added entry for John MacInnes Slide Rule Award (Scholastic Achievement) Named for John MacInnes (1925 -1983) who coached the Michigan Tech Huskies for 26 seasons.
    2014.11.11 - SR_Library/Catalog - Added 1968 Pickett Slide Rule Catalog at top of page, Scan Donated By Steven Decker
    2014.11.11 - Pickett - Added 1968 Pickett Slide Rule Catalog at top of page, Scan Donated By Steven Decker
    2014.11.11 - Unique - Added Unique Log Log, Original Owner: H.G. Millhouse, UK.
    2014.11.11 - Faber - Added A.W. Faber "Castell" 360 (English) dc3-3 (1903) Original Owner: H.G. Millhouse, UK.
    2014.11.10.01 - Received Parisan Novelty Co. Cost And Selling Price Indicator c1950
    2014.11.07.01 - Recieved gift of K&E 4088-3 belonging to Merle (Mike) Walker inventor and Remington Arms, by daughter Janet L. Dubane of Barnegat, NJ.
    2014.11.06 - Military - Added N520-T U.S.A.F. Aerial Photo slide rule Type-A1, aluminum stock, in box. Gift of Phillip Rodley.
    2014.11.06 - Pickett - Added N520-T U.S.A.F. Aerial Photo slide rule Type-A1, aluminum stock, in box. Gift of Phillip Rodley.
    2014.11.06 - SR_Menu - Added Brands: Davis Instruments, Hewig, and Parisan Novelty
    2014.11.06 - United States/Parisan Novelty - Added Pocket Slide Rule patent US2073421, gift of Ed Millis, Dallas, Texas and Added Davis Instruments Time-Speed-Distance Computer, Gift of Ed G. .
    2014.11.06 - Circular - Added Davis Instruments Time-Speed-Distance Computer, Gift of Ed G. .
    2014.11.06 - Patents/US - Added US002450668 CALCULATOR inventor E.G. Kesling 1948, found on Addiator page, and US2073421 RULE inventor Joseph Komorous of Parisan Novelty Co. found on United States gallery.
    2014.11.06 - Addiators - Reformated page. Copied 3 Faber Castell slide rules with addiators on back to this gallery. Added bio and pictures of Shell Thuet to Kesling Pocket Adder and patent.
    . 2014.11.05 - Addiators - Added Hewig Graphic Calculator, Edward T. of Odenton, Maryland. Copied Sterling adding machines to this gallery.
    2014.11.05 - United States/C-thru - Added C-Thru PS-69 Proportional Scale 5in dia, gift of Phillip Rodley, Upper Hutt, NZ.
    2014.11.05 - Circular - Corrected broken link to Dalton Dead Reckoning Computer, Added C-Thru PS-69 Proportional Scale 5in dia, gift of Phillip Rodley, Upper Hutt, NZ.
    2014.11.05 - Italy - Added Hono-Rietz 300 No1 promoTRIULZ. Gift Of Edward T. Wright, Odento, Maryland
    2014.11.05 - Sterling - Added(Replaced) 568 6-Digit Dial-A-Matic Automatic Adding Machine (REF). Gift of Ed
    2014.11.05 - Aristo - Added(Repaced) 0970 Multi-Log Charvoz(S064) dc65-4 (1964). Gifts of Ed
    2014.11.04 - Aristo - Added(Repaced) 0903LL Scholar dc9 variant, Aristo 905 Shut-Commerz 1962 (S546), 0903LL VS-2 Scholar dcG6136. Gifts of Ed
    2014.11.04 - SR_Library/Japan - Added Lutz (Ricoh) Models No. 151, 153, 252, 551 instructions. Gift of Ed
    2014.11.04 - SR_Library/Russia/China - Added Flying Fish 1003 and Flying Fish 1018 manuals. Gifts of Ed
    2014.11.04.01/M330 - Received Pickett N520-T USAF Aerial Photo Slide Rule NIB c1951, with instructions. Gift of Phillip Rodley, Upperhutt, New Zealand.
    2014.11.03 - SR_Loaner - Sent 25 Fedras to Prof. Jorge Nuno Silva of the Museu de Ciência in Lisboa, Portugal for the Associação Ludus math teacher program.
    2014.11.03 - SR_Rescue/Fundraiser - Sent two slide rules, adopted by T. Kirkpatrick of Safe Harbor, Florida.
    2014.11.02 - K&E_Specialty - Corrected scale description on K&E 4133 Roylance entries (back scale was 25cm s/b 20.5cm). Thanks to Philip Stanley.
    2014.10.29 - Orient - Added(replaced) Flying Fish 1003 Vector (S557) c1978, Flying Fish 1015 Vector c1975. Flying Fish 1018 Electrical. Gifts Of Edward , Odenton, Maryland.
    2014.10.29 - Dietzgen - Added(Replaced) Dietzgen 1767P National (S001 - note: first slide rule scanned at ISRM in 2003). Gift Of Edward , Odenton, Maryland.
    2014.10.29 - Faber - Added 1/22 Business Slide Rule dc 11-59 Gift of Phillip Rodley, Upperhutt, New Zealand
    2014.10.29 - Library/Euro - Added 52-82 "Duplo" D-Stab Student Biplex Instructions. Gift Of Edward , Odenton, Maryland.
    2014.10.29 - Faber - Added(Replaced) Faber 52/81 Novo-Mentor (S260) dc9-70, 52-82 D-Stab (S003) with Instructions. Gifts Of Edward , Odenton, Maryland.
    2014.10.28 - Faber - AW_Faber 1/87 Rietz dc5-54. Gift Of Phillip Rodley,
    2014.10.21 - Acumath - Added Mid-Continent Spring Co. Spring Design Slide Rule- c1950
    2014.10.21 - Dietzgen - Added(Replaced) 1734 sn114559 Decimal Trig Log Log (12.06.06.24 sn056181). Owned by former POW SSGT Robert Chicca of the USS Pueblo Incident in North Korea in 1968. with authentication. Gift of Edward of Odenton, Maryland.
    2014.10.20 - K&E Standard - Added K&E 4090-3 Log Log Duplex Trig 1936 S/N 492569 Owned by Victor H. Hodge, with references from McCoys K&E Catalo. Gift of Edward .
    2014.10.17.01 - Acquired Mid-Continent Spring Co. Spring Design Slide Rule.
    2014.10.17 - FundRaiser/Slide Rule Adoption - ISRM currently has 219 slide rules available for adoption.
    2014.10.17 - Hemmi - Added(Replaced) Hemmi 153 Electrical pre-WWII no dc. Gift of Ed . Hemmi 259 dcJK Mechanical Engineer.(S002).
    2014.10.17 - SR_Library/Japan - Added Lafayette 99-7128 Decima-Dyne Instructions. Hemmi 153 and Special Scale Instructions. Gifts of Ed
    2014.10.17 - Ricoh - Added(Replaced) Lafayette 99-7128 Decima-Dyne(Archive) Gift of Edward . Relay 403 Gift of Phillip Rodley.
    2014.10.16 - Australia/NZ - Added two brand catagories from New Zealand disc and slide chart Makers. Added Winston Concrete Block Calculator and Industrial Models Dimension Dial, Gifts of Philip Rodley.
    2014.10.16 - Australia - Added(Replace) W&G 432 Dual Face Comprehensive Slide Rule (S234). Gift of Phillip Rodley.
    2014.10.16 - Library/Pickett - Added ISRM M329 Pickett How To Use Log Log Slide Rules N800, N803, N300,N600,N4. Gift of Ed Millis, Dallas, Texas.
    2014.10.16 - Pickett - Added(Replaced) Model N803-ES with Manual. Gifts of Edward Millis of Dallas, Texas.
    2014.10.16 - Pickett - Added(Replaced) Model 2 Magnesium leather sleeve (S165) sn3D07552, 120-ES Marked "Made in Mexico". N-525-T StatRule, N904-T Decimal Keeper (S476). Gifts of Edward T. of Odenton, Maryland.
    2014.10.16 - Aerospace - Added(Replaced) Model 100 Douglas Sky Rule rounded braces. (Replaced Steve Treadwell scan). Gift of Ed Millis, Dallas, TX
    2014.10.15 - Received gifts of slide rules from Edward T. of Odenton, Maryland. The following are New Additions:
    • 14.10.15.01 - Dietzgen 1734 sn114559 Decimal Trig Log Log. Owned by former POW SSGT Robert Chicca of the USS Pueblo Incident in North Korea in 1968. with authentication.
    • 14.10.15.02 - K&E 4090-3 sn 492589 with Magnifying cursor.
    • 14.10.15.03 - Pickett N600-T in Apollo box. stains on SR from leather sleeve.
    • 14.10.15.04 - Jakar 11 Pocket Mannheim with leather sleeve.
    • 14.10.15.05 - UTO. No. 601 Pocket Mannheim with leather sleeve PromoCompany:NORTH
    • 14.10.15.06 - Diwa Pocket Rietz dc276 with leather sleeve PromoCompany: ITT Canon Electric
    2014.10.15 - Pickett - Added(Replaced) Model 100 Douglas Sky Rule rounded braces. (Replaced Steve Treadwell scan). Gift of Ed Millis, Dallas, TX
    2014.10.15 - Aerospace - Added BRL N52 Aviation Slide Rule, (duplicate entry) gift of Phillip Rodley of UpperHutt, New Zealand.
    2014.10.15 - Blundell/BRL - Added BRL N52 Aviation Slide Rule, gift of Phillip Rodley of UpperHutt, New Zealand.
    2014.10.15 - SR_WhosWho - Added Edward T. , Ph.D of Odenton, Maryland.
    2014.10.15 - K&E - Added(Replaced) 68-1210 Log Log Duplex Decitrig (S483) sn930120 with photo and bio of Edward T. of Odenton, Maryland.
    2014.10.14 - Formatted images from 150 scans of 34 slide rules, and 417 scanned pages for 14 books and manuals to be added to galleries, to begin posting tomorrow.
    2014.10.14.03 - Acquired Alameda Naval Air Station Engineer's Pin (has slide rule in artwork.
    2014.10.14.02 - Acquired Faber 360 out of UK.
    2014.10.14.01 - Acquired Unique Log Log Slide Rule out of UK.
    2014.10.11 - ISRM was contacted by David O'Conner, after Ebay was contacted. He willingly pulled the Ebay listing #181545576880.
    2014.10.11 - Discovered that a David O'Conner in England under the eBay handle of Newintentions, is selling the contents of the ISRM library on DVD as his own work as listiing #181545576880. This is a slap in the face of all those who have contributed their time and efforts in building the Library. If you bought one of these, please let us know.
    2014.10.11.04 - K&E N9081-3 Doric S/N 34284 black leatherette sleeve, for adoption
    2014.10.11.03 - K&E N9081-3 Doric S/N 21654 brown leatherette sleeve, for adoption
    2014.10.11.02 - Obtained Sun Hemmi 259 For Expert Mechanical Engineer
    2014.10.11.01 - Received gift of E.TATA pocket slide rule from Nan Propper of Succasunna, New Jersey.
    2014.10.11 - Received gifts of slide rule books and manual from Edward T. of Odenton, Maryland.
    2014.10.10 - Spent the last two days scanning slide rules donated by Phillip Rodley, Ed and Ed Millis on new scanner. Received setup guidance from supporter Steve Seals who recommended this model.
    2014.10.09 - Received gifts of slide rules from Edward T. Wright of Odenton, Maryland. The following are New Additions:
    • 14.10.09.01/M326 - Flying Fish 1003 Vector Hyperbolic in Green Cardboard sleeve with instructions.
    • 14.10.09.02/M327 - Flying Fish 1015 Vector Hyperbolic in Grey Plastic sleeve with instructions.
    • 14.10.09.03/M - Flying Fish 1018 Electricians slide rule in Grey Plastic sleeve.
    • 14.10.09.05/M328/M325 - Hemmi 153 Electrical. pre or during WWII with instructions.
    • 14.10.09.06/M320 - Pickett N-525-T Stat Rule in Original Retail Box NOS with instructions
    • 14.10.09.07 - Parisan Novelty Co. Pocket slide rule with elecrical helps in well. Dittman and Greer Promo.
    • 14.10.09.08 - K&E 68-1210 Log Log Duplex Decitrig sn930120 (Replace S483)
    • 14.10.09.09/M319 - Faber-Castell 52/82 D-Stab Biplex in Retail box with instructions (Replace S003)
    • 14.10.09.04 - Faber-Castell 52/81 Novo-Mentor in Grey plastic sleeve (Replace S260 )
    • M321 - Lafayette 99-7128 Instructions
    • M318 - Boots Ringplan Instructions
    • M317 - Lutz 151, 153, 252, 551 Instruction
    • M316 - Aristo 0903, 0903LL, 0903VS, 0903VS-2 Instructions
    • 14.10.09.10 - Pickett Microline 160-ES Student, Black naugahyde sleeve. Made in Mexico
    • 14.10.09.11 - Hono-Rietz 300 No1 promoTRIULZ.
    2014.10.07 - SR_Loaner - Sent 30 Acumath 400's to Jim Hus, Highland High School, Highland, Indiana.
    2014.10.07.01 - Obtained a Makebar-Kombinator slide rule pencil from Riga, Latvia.
    2014.10.06 - SR_Menu - Added Brands Clemenston and Hono-Rietz
    2014.10.06 - Added (replaced) K&E 4108 Military Slide Rule (American Blueprint) c1950, with photo and bio of donor, Edward of Odenton, MD
    2014.10.06 - Dietzgen - Added Dietzgen N1732 Micromatic Trigonometric Log Log s/n 585550 with photo and bio of donor, Edward of Odenton, MD
    2014.10.05 - Faber - Added Faber-Castell 111/66 Demegraph System Schirmer Typesetter's Rule. Gift Of Phillip Rodley, NZ
    2014.10.05 - Sterling - Added additional photos to Sterling 539 pocket rule. Heretofore we did not know the model number. Photo couertesy of B Potratz.
    2014.10.05 - Pickett - Added(Replaced) N902-ES Simplex Trig (ISRM 11.11.21.01) with bio and photo of Jeanette Lyon, Myrtle Beach, Florida.
    2014.10.05 - K&E - Added K&E 4081-5 Log Log Duplex DeciTrig - S/N 766300 and Jesse (bud) Lyon photo and Bio. Gifted by his wife Jeannette Lyon, Myrtle Beach, Florida, in memory of her husband, Bud.
    2014.10.05 - Dietzgen - Added N1731 Micromatic Trigonometric Log Log s/n 084303. Gift of Ed Millis Collection.
    2014.10.06 - Military - Added duplicate entry of "Sun" Type98 Manuevering Slide Rule 1938 (Japanese year 2598), including picture of the Japanese Battleship Yamato, Translations by Jiro Higuchi. Gift of Phillip Rodley, Upperhutt NZ
    2014.10.06 - Hemmi - Added backgtound information on "Sun" Type98 Manuevering Slide Rule 1938 (Japanese year 2598), including picture of the Japanese Battleship Yamato, Translations by Jiro Higuchi.
    2014.10.03.01 - Dietzgen - An undocumented Maniphase Model 1735 Vector sn 104674 was found while rumaging through the archives. It has a newer framed cursor that should be for the wider (1-3/4" vs 1-5/8") stock Micromatic series. A K&E cursor is a better fit. Found a Dietzgen cursor for it.
    2014.10.03 - Received a new Plustek OpticPro A320 large format CCD scanner to replace an aging HP4C Legal scanner attached to an XP computer. Neither are supported anymore. Setup and trial run set for today. This was made possible by the generous donations of ISRM supporters.
    2014.10.02 - United Kingdom - Added Clemenston Steam Pipe Sizing Slide Rule. Gift of Phillip Rodley, Upperhutt New Zealand
    2014.10.02 - France - Added Tavernier-Gravet c1910, Made in France - Rue Mayet 19, Paris. Gift of Phillip Rodley, Upperhutt New Zealand
    2014.10.02 - Hemmi - Added "Sun" Type98 Movement (like an Dalton Navigation Computer) 1938 (Japanese year 2598). Gift of Phillip Rodley, Upperhutt New Zealand
    2014.10.02 - SR_Terms/Encyclopedia - Added Belcher & Sons history.
    2014.10.02 - SR_WhosWho - Added Thomas Belcher, rule maker in New York from , who produced the Gunter Rule in the ISRM Rarities Gallery.
    2014.10.01 - Post - Added Post 1460 Versalog - S/N 831572 in Retail Box. Gifted by Bill Geren of Dallas, Texas.
    2014.10.01 - HSRC Catalogue - Added Text only list of Herman's Slide Rule Catalogue containing 4,224 specimens,
    2014.09.30 - Slide Rule Rescue - Lee Scott adopted a slide rule.
    2014.09.30 - SR_Loaner - Sent slide rules to Sister Paula Irving of the Community of Jesus, Orleans, MA.
    2014.09.30 - Japan - Added E.TATA category. two examples known.
    2014.09.30 - Acumath - Added(replaced) Model 500 Square braces c1968 (S137). Gift of Huang Collection.
    2014.09.30 - SR_Library/Euro - Added Faber-Castell 1-87A System Rietz with Addiator Instructions (English) (M313), AW Faber 375/361 Instructions. (M311). Faber-Castell 1/28 Super-Business Instructions (M312). All gifts of Philip Rodley
    2014.09.29 - Curator is back in the building! (after a two week hiatus. Time to catch up om scanning.
    2014.09.25 - Received gifts of very rare slide rules acquired by Phillip Rodley, Upperhutt New Zealand
    • 14.09.25.01 - "Sun" Mariner's Navigation Rule cWWII. Labels in Japanese.
    • 14.09.25.02 - The Clemenston Steam Pipe Sizing Slide Rule. S.P.Clemenston, 17 Buckingham St., Strand, London, W.C.2
    • 14.09.25.03 - Tavernier Gravet Rue Mayet 19l Paris. Equivalents in French.
    2014.09.22 - SR_WhosWho - updated Karl Klein's photo and bio. Updated David Sweetman's bio. Both recipients of the 2014 Oughtred Award.
    2014.09.17.02 - Received gift of Pickett N902-ES slide rule belonging to and used by Jeanette Lyon, Myrtle Beach, Florida. Will replace ISRM 11.11.21.01
    2014.09.17.01 - Received gift of K&E N4081-5 sn766300 slide rule belonging to and used by Jesse (Bud) Blount Lyon, II, Myrtle Beach, Florida. Need snew cursor blocks.
    2014.09.14 - SR_WhosWho - Added Jerry Merryman, co-inventor of the first pocket calculator at Texas Intruments.
    2014.09.21 - Received gifts of slide rule from Edward T. Wright of Odenton, Maryland. The following are New Additions:
    • 14.09.21.01 - Lafayette 99-7128 dcO.S-1, Decima-Dyne with leather sleeve
    • 14.09.21.02 - K&E 4139 Cook Radio Rule sn936496. Marked RMS 652. Has KERCS. Brown sleeve, no flap.Restored cursor
    • 14.09.21.03 - Dietzgen N1732 sn585550 Decimal Maniphase Multiplex Trig Type Log Log Rule, in box, no sleeve.
    • 14.09.21.04 - K&E 4108 U.S. Military Slide Rule, American Blueprint Co. NY
    • 14.09.21.05 - Aristo (Charvoz) Nr.0970 dc654, Dark Brown Leather sleeve (shrunk, so that the slide rule will not fit) Add to gallery, does not have yellow strips.
    • 14.09.21.06 - Pickett 120-ES Marked "Made in Mexico" (variant)
    • 14.09.21.07 - Dietzgen 1767P National. Replace S001 (this was the first SR scanned)
    • 14.09.21.08 - Hewig Company, New York - Graphic Calculator - for Addition and Subtraction
    • 14.09.21.09 - Nestler 11E Electro pocket, missing cursor
    2014.09.19 - SR_Adoption - Phil Simich and Beth Lander (for daughter Sarah Lander) both adopted slide rules from ISRM's Slide-Rule-Rescue program
    2014.09.08 - Received The Slide Rule Technical Cultural Heritage by IJzebrand Schuitema, a reprint from the Oughtred Society for the ISRM research library,
    2014.09.08 - Received gift of slide rules from Edward T. of Odenton, Maryland. The following are New Additions:
    • 14.09.08.01 - Pickett N904-T Trig and Decimal Keeper Speed Rule in retail box (Replace S476)
    • 14.09.08.02 - Pickett Model 2 Magnesium leather sleeve (replace S165)
    • 14.09.08.03 - Hono 300 No.1 Rietz with red cardboard sleeve (add more specimens from HSRC)
    • 14.09.08.04 - Aristo 0903LL Scholar dc9 slight variant
    • 14.09.08.05 - Aristo Nr.0905 Shut-Commerz (Commerce) snG6233 (replace S546)
    • 14.09.08.06/M316 - Aristo 0903 VS-2 Scholar dc G6136 grey.Cardboard sleeve marked Keith A.C.Wilson. with manual.
    • 14.09.08.07 - Sterling 569? 6-Digit Dial-A-Matic Automatic Adding Machine
    2014.09.08 - KE_Standard - Corrected scale set on K&E 4081-3 S/N 717411 (1952) ISRM 13.08.27.01 No 'DI' scale.
    2014.09.18 - Received Gift from Fred Astren
    Richard Rose of Ohio , David Walker of the United Kingdom , Kent Berglund of Illinois
    2014.08.17 - Received Gifts from Philippe Deau of France , Michael Mjelde , Roi Gift of Washington, John Cadick of Texas , Walter Davis of Nevada , Thomas Yorker of New York .
    2014.08.17 - Maintenance - Rod Lovett did an analysis of sliderulemuseum.com and found many bad URLs. 303 out of 22965 links were found to be broken. ISRM is HUGE! These will be on the list of many things to do. Thanks, Rod.
    • 22965 URLs checked
    • 22662 good URLs found
    • 303 bad URLs found
    2014.08.14 - Received Gift from Nick Strauss of Washington
    2014.08.14 - SR_Library - Removed the block preventing downloads during the fund raiser. Kids are going back to school so it needs to be available for research.
    2014.08.08 - Received Gift from John Webb
    2014.08.05 - Received Gift from Perkunas Kavolis .
    2014.07.29 - Germany - Added new manufacturer's catagory "Norma". Added three specimens from the Rod Lovette (UK) and Hubert van Dongen (NL) collection.
    2014.07.28 - Received Gift from Phillip Simicich, Indiana, Laurie Emery, Iowa , James Enterline ..and Richard Burns .
    2014.07.26 - I lost this page and had to recover it from the server. OUCH!
    2014.07.22 - Received donation of slide rules from Phil Rodley from around New Zealand, all acquired at his expense.
    • 14.07.22.01 - W&G Model 432 Dual Face Comprehensive Slide Rule with black cardboard sleeve.
    • 14.07.22.02 - W&G "Douglas" Combined Protractor and Parallel Rule
    • 14.07.22.03 - BRL N52 Aviators slide rule with Blue cardboard sleeve.
    • 14.07.22.04 - Faber Castell 111/66 Demegraph System Schirmer in clear hard case
    • 14.07.22.05 - Faber Castell 1/87 Reitz dc 5-54 (May 1954)
    • 14.07.22.06 - Faber Castell 1/22 Business Slide Rule dc11-59 in repaired hard plastic case.
    • 14.07.22.07 - Relay Model No.403 pocket slide rule dcDK-3
    • 14.07.22.08 - Industrial Models, Wellington, NZ.Dimension Dial For Illustrators.
    • 14.07.22.09 - C-Thru PS69 Proportional Scale, USA
    • 14.07.22.10 - Concrete Volume/Block Calculator/Computer. Promo:Winstone, Blackburne Smith LTD.
    • M322 - The Slide Rule For Ship's Officer by J.C.Podmore 1949 Reprint with plastic protractor.
    • Mxx - Murby's Science Series Arithmetic of Electrical Measurements by W.R.P. Hobbs, RN, A.L.E.E. 1905
    2014.07.18 - Received Gift from Phil Rodley in Upperhutt, NZ. a Friend of the Museum.
    2014.07.17 - Ephemera - Added photo of TI engineer Ed Millis whic shows a slide rule on his desk.
    2014.07.17 - SR WhosWho - Added entry and photo of TI electrical engineer Ed Millis, who donated his slide rule collection to ISRM.
    2014.07.15 - Added(Replaced) Dietzgen 1776 Redirule Pocket Duplex (P042), gift of Ed Millis, Dallas, Texas.
    2014.07.15. - Aristo - Added reference article from the Journal of the Oughtred Society Vol 6.1: DENNERT & PAPE and ARISTO Slide Rules 1872 - 1978
    2014.07.13 - Pickett Replaced several entries and created placeholders for new additions from Ed Millis Collection.
    2014.07.12 - 2014 Fund Raiser - Temporarily Disabled manual downloads until goals are reached
    2014.07.10 - Received donation from John Pattinson, now a Friend of the Museum.
    2014.07.04.01 - Handed a Post 1450 Versatrig dcTD (April 1969) at an Independance day celebration for donation to ISRM. Found in an old house in Denver. Replaces S335.By neighbor of Kevin Owen and Lavan Sayed.
    2014.07.03.XX - Items for adoption.
    2014.07.02 - Received 4 boxes of donated slide rules, electronic calculators, Slide Charts, Books, Manuals and ephemera from the collection of Ed Millis, Dallas, Texas.
    • 14.07.02.01 - The Technical Aeronautical Slide Rule, British Made
    • 14.07.02.02 - Concise No.28 with Instructions and sleeve.Textool Products Promo on sleeve.
    • 14.07.02.03 - Rockwell-Standard Spring Calculator 1968 Col-Q-Lator slide chart
    • 14.07.02.04 - Westab "Time Saver" Circular Slide Rule with reference tables.©1965
    • 14.07.02.05 - C-Thru S-94 4-1/2 inch diameter circular slide rule
    • 14.07.02.06 - Concise No.32 keyfob circular slide rule with perpetual calenders w/inst. Replace C07)
    • 14.07.02.07 - Charles Bruning 2401 w/Texas Instrument Logo
    • 14.07.02.08 - Unique Ten-Twenty Slide Rule, Made in Emgland with poem about coal-tar
    • 14.07.02.09 - Hemmi 200 16" 400mm Precision Duplex. (Originally known as "Ultra accuracy.") slide rule, logo on slide, no model number c1937-41
    • 14.07.02.10 - K&E N-4100 stadia sn623559 (metal framed cursor) 1925-1960 scale set#4
    • 14.07.02.11 - National Semiconductor 4660 (slide rule) claculator w/manual needs 3 new AAA nicads.
    • 14.07.02.12 - Dalton Dead Reckoning Computer - Type E6B AN-5835-1 Made by Felsenthal & Sons (Black Aluminum)
    • 14.07.02.13 - Dalton Dead Reckoning Computer - Type Spec 94-27892, Made by Felsenthal & Sons - Steel, US Army Air Forces
    • 14.07.02.14 - Dalton Dead Reckoning Computer - Type E6B AN-5835-1 Made by Weems White Plastic
    • 14.07.02.15 - Batori USA, Navigational/Vector Computer. B-23, Type Made in Switzerland
    • 14.07.02.16 - Dalton Dead Reckoning Computer - Type E6B Spec 94-27892, Made by Stanley Manufacturing - Steel, US Army Air Forces
    • 14.07.02.17 - Pickett No.106C Proportional Scale - 14.6cm dia on retail card (replaces REF)
    • 14.07.02.18 - Slide-Chart Corp. 15" Circular Slide Rule (1964) Litton Industries Promo. (add with SCA 1972 version)
    • 14.07.02.19/M - 12" Graphical Firing Table, M24 Rule No.3, with TM 9-524 Manual
    • 14.07.02.20 - K&E N4053-5 20 inch Polyphase Mannhiem - S/N 352984 c1947, New improved cursor. Cardboard Sleeve. Top Marks: FarLeft[Keuffel&Esser CO.NY] + FarRight[PAT.1,934,232 MADE IN USA]. Scale Labels on left, Model# on right of slide.
    • 14.07.02.21 - K&E N4053-5 20 inch Polyphase Mannhiem - S/N 375208 c1932, Missing Cursor s/b all-glass with reinforced blocks. Top Marks: + [PAT.June 5, 1900] +[Keuffel&Esser CO.NY] + [MADE IN USA]. Scale Labels on left, Model# on right of slide.
    • 14.07.02.22 - K&E 4051-5 Lot 179 (1915) with all glass cursor w/ metal bars
    • 14.07.02.23 - K&E N4053-5 sn998801 (1942) all glass cursor (s/b New Improved after 1936). Leather sleeve. Top Marks: [Keuffel&Esser CO.NY] + [PAT.1,934,232] + [MADE IN USA]. Scale Labels on left, Model# on right of slide.
    • 14.07.02.24 - K&E 4041 Lot36 All glass cursor cardboard sleeve.
    • 14.07.02.25 - K&E 4035 8inch All glass cursor leather sleeve. Pat.June 5, 1900 mark located in well. no sn, lot #2.
    • 14.07.02.26 - K&E N4088-5 sn545519 w/KERCS. c1938. Intact leather sleeve. Patent number [Pat.1,930,852] c1938 marked rather than patent date [June 5, 1900] c1936. This makes it a newer date,
    • 14.07.02.27 - Pickett 903-T Trig Conversion slide rule. c1953, Rounded braces, grooved stock, Triangle logo,
    • 14.07.02.28 - Globe Aircraft Specialties Airlines Computer Model D.Copyright 1946. Rear disk is cracked and repaired with tape.
    • 14.07.02.29 - Aeronav Private Pilots Flight Calculator Model I. Mfg. by Whitehead & Hoag Co. Newark, NJ.
    • 14.07.02.30 - Water Line Capacity Slide Rule. Copyright 1944&1971 by B.F. Grizzle in Black mock alligator sleeve.
    • 14.07.02.31 - Teledyne Post No.1410 dcUC Mar.1970 (same as Hemmi P281) in blue and grey hard plastic .
    • 14.07.02.32 - AW Faber-Castell 1/60 dcJune1940 in cardboard sleeve. with metal framed cursor.
    • 14.07.02.33 - Dietzgen 1735 Vector Maniphase Multiplex. sn111567 with two cracked lenses.
    • 14.07.02.34/M - Globemaster 62205 Plastic slide rule w/instructions
    • 14.07.02.35 - Pickett Model 800 - Log Log Duplex, sn11H1641 - 1945-1950 (replace S220)
    • 14.07.02.36 - Lawrence RCA F.M. Coverage Calculator, Made by Lawrence Engineering, Peru, Indiana.
    • 14.07.02.37 - K&E 4058C Beginner's Slide Rule (Replace S478) Belonged to student Walter Sussman
    • 14.07.02.38 - K&E N4053-3 sn61784 All Glass Cursor c1924, Patent mark June 5,1900. Black cardboard sleeve, missing flap.
    • 14.07.02.39 - K&E 4093-3 Log Log Duplex Vector sn520441 Replace S263 (has KERCS use cursor from K&E4080-3 sn404269)
    • 14.07.02.40 - K&E 4058C V2 Beginner's slide rule (variant printing of equivalents tables). In pristine cardbaord case.
    • 14.07.02.41/M04 - K&E 4056 Favorite Trademark Slide Rule sn818452 w/ black cardboard case. Replace S053. Manuals: Elementary Instructions (for 4058W)
    • 14.07.02.42 - K&E 4088-3 Duplex All-Glass Cursor (two chipped corners) sn70104 Has Times Romas Font scale labels. Intact Leather sleeve. Name: J.Edward. Jennings '27. Replace S438.
    • 14.07.02.44 - K&E 4083-3 Log Log Duplex Vector sn833117 ST scale. 1954-1956 scale set. Inlaid Laminated edges. Intact leather sleeve.
    • 14.07.02.45 - K&E 4071-3 Polyphase Duplex Decitrig sn596150. One cursor block has KERCS. In black cardboard case. Replace S304
    • 14.07.02.46 - Pickett C-18-T Collins Microwave Transmission Dual Base Log Log Speed Rule. Red Leather sleeve. Name: L.Claunch. Replace REF.
    • 14.07.02.47 - Post (Hemmi) 1452T Pre-WWII with Quot aids. Made in Japan. No date code. No back equivalents label.
    • 14.07.02.48/Mxx - Post (Acu-Rule, Festus, Missouri.) 1452-D Universal. WWII era. Plastic cursor. Made in USA. With retail box, red naugahyde sleeve. With Manual. Replace S023
    • 14.07.02.49 - Acu-Rule Mannheim (Same as Post 1452-D Unversal) Generic marking.Plastic cursor. WWII Era.
    • 14.07.02.50 - Acu-Math 500 Duplex Trig. Metal Braces. Molded plastic cursor. Oval Logo. c1960. Brown Naugahyde sleeve. Replace S139
    • 14.07.02.51 - Acu-Math 900 Professional Mannheim Trig. Plastic stock. Metal Braces. Plastic two sided cursor. Red Oval Logo. c1955. Tan Naugahyde sleeve. Add new entry.
    • 14.07.02.52 - Acu-math 1311 - Duplex Log Log Decimal Trig-c1950 Celluloid laminated wood stock. Single sided braces. Two sided cursor. Missing screw.
    • 14.07.02.53 - Acu-math 600 Basic Trig - c1955 All plastic stock. Tan sleeve. Written on sleeve: Texas A&A. Inside flap: "Don't steal me, my owner is flunking Chemistry". Charles Middleton. Replace S427.
    • 14.07.02.54 - Acu-Rule 10-D Version 2, Magnifying cursor. Red cardboard sleeve. Instructions.
    • 14.07.02.55 - Lawrence 10-B Magnifying cursor. Back has 8-B artwork that shows Wabash, Ind. Front shows Peru, Ind.
    • 14.07.02.56 - Lawrence 10-B Flat cursor. Both sides painted white, then silkscreened scales. Back has 8-B artwork that shows Wabash, Ind. Front shows Peru, Ind. Replace S386
    • 14.07.02.57 - Lawrence 10-B Flat cursor. Full length silkscreen on back. Add new variation. There seems to be 3 variations of rear artwork on the 10-B's. so this will document another, with the standard cursor.
    • 14.07.02.58 - Pickett Microline 140-T - Duplex. White plastic. First injection molded design. Inverse scales same as the rest.
    • 14.07.02.59 - Pickett No.120 Trainer (2nd design - Grey braces)
    • 14.07.02.60 - Pickett No. 121 Trig Conversion. Replace S317.
    • 14.07.02.61 - Pickett 80 Student Trig in Retail Sleeve $1.38 price tag. With Instructions.
    • 14.07.02.62 - Pickett No.120 Trainer (1st design - White laminations over black stock. black braces). Replace current image.
    • 14.07.02.63 - Pickett N3-T Power Log Exponential Round Black Logo. Slight spot of corrsion on stock and slide. Brown sleeve. New Addition.
    • 14.07.02.64 - Pickett N4-ES Log Log Vector Hyperbolic. All-black text on Scale labels. Inverse scales with left arrows. Artwork 300/306 in Chicago. Round black logo . Square braces. Extended nylon cursor blocks, flat lens. Brown leather sleeve w/o plastic insert.
    • 14.07.02.65 - Pickett N531-ES CREI Capitol Radio Engineering Institute. Modern Logo w/ MEXICO.
    • 14.07.02.66 - Pickett N3-ES Power Log Exponential (1959), Aluminum Stock, Round Black Logo, Square finger braces, Inverse scales use left arrow: '<' Name on Sleeve: F.V.Macalalad, M.D., coauthor: "Survival of intestinal allografts in the dog with and without immunosuppression.",1965. "Ultra-rapid nitrogen balances in man",1971. "Peritoneal dialysis simplified",1974. "Evaluation of a vented drainage system in prevention of bacteriuria",1977.
    • 14.07.02.67 - Pickett N1010-T Trig, c1958.Round Black Logo, Square Braces, with Leather sleeve/plastic insert.Name on flap: Len Devito. Replace ISRM 12.06.24.47 which is damaged.
    • 14.07.02.68 - Pickett N803-ES Log Log Speed Rule Dual Base (1959)
    • 14.07.02.69 - Pickett N-500-T Hi Log Log with Black leather sleeve. (1960) round blk logo
    • 14.07.02.70 - Pickett N800-ES Log Log Speed Rule 1964 Modern logo Black leather sleeve
    • 14.07.02.71 - Sheradoo Inc. , Detroit. Fraction of an inch adding machine. 1952. Patent No. 169,941 issued 1953. Make your own at http://www.evilmadscientist.com/media/inchadder.pdf
    • 14.07.02.72/M333 - Kalkometer Addiator, with stylus, sleeve, and instructions. Made in USA.c1960.
    • 14.07.02.73 - Pickett Model 100 Douglas Sky Rule. 1951. Metal cursor bars. Rounded braces.
    • 14.07.02.74 - Post 1441 (Sun Hemmi) with Magnifier. Pre-WWII. Rivets on back. Sleeve is marked U.S.Blue Co. Chicago. No.1888.
    • 14.07.02.75 - Post 1441 (Sun Hemmi) with Magnifier. "Made In Occupied Japan". Post-WWII 1945-1950. Rivets on back. Sleeve is marked with owner: Charles T. Holmes.
    • 14.07.02.76 - Post 1441 (Sun Hemmi) with Magnifier. dcFF (June 1955). Rivets on back. Sleeve is marked with owner: Charles T. Holmes.
    • 14.07.02.77 - Post 1444 (Sun Memmi) Pre-WWII. Missing cursor. Brown leather sleeve. Narrower stock than 1444K. Replace P122
    • 14.07.02.78 - Post 1444K (Sun Memmi) dcEF (June 1954). Printed date code next to hemmi on back. Brown leather sleeve with pocket clip. Replace P121
    • 14.07.02.79 - Post 1444K (Sun Memmi) dcLD (April 1961). Hemmi brand markings on back. Stamped date code stamped bottom left rear. Brown leather sleeve with pocket clip. Replace P170
    • 14.07.02.80 - Post 1444K (Sun Memmi) dcOA (Jan 1964). Hemmi brand markings on front. Stamped date code stamped bottom left rear. Brown leather sleeve with pocket clip. Name: Charles Weeks. New variance.
    • 14.07.02.81 - Aristo No.89 1st version (note back trig window). All black text on scales. No scale labels. Metal framed cursor (cracked glass). Well: DENNERT & PAPE Hamburg-Altona dc 431 (c1943). Logo:1939-52.
    • 14.07.02.82 - Dietzgen 1771 redirule (rebranded Charles Bruning) - Replace P043
    • 14.07.02.83 - ECCO 10000 Pocket duplex. (same as K&E Doric 9068). Very rare. has Cracked cursor blocks.
    • 14.07.02.84 - Dietzgen 1776 redirule Pocket Duplex. Brown leather sleeve with bare metal pocket clip. Replaced P042 in gallery.
    • 14.07.02.85/M - K&E 4150-1 K&E 4150-1 sn2930. In green leather sleeve, with retail box, Instructions - Replace P003
    • 14.07.02.86 - Bruning 2401 Mannheim, latest cursor. Blank back. Brown leather sleeve, Name: Jim Adams. Replace P163
    • 14.07.02.87 - Bruning 2401 Mannheim. (1945) Back Promo: Machine Tool Electrification Forum -1945. Brown Sleeve: Gold embossed Name: Alfred E. Trosch
    • 14.07.02.88/M - B.F. Grizzle (8" wood stock Made by Lawrence Eng.) Water Line Capacity Slide Rule. Copyright 1944.
    • 14.07.02.89 - Cost and Selling Price Indicator.Parisian Novelty Co. 1934/35 copyrights. Pocket size SR made from folded plastic film.
    • 14.07.02.90 - Helipot Generic slide rule with conversions, ohms law charts. Made by Whitehead Hoad, Newark. N.J.Pocket size SR made from folded plastic film, with similiar constructed cursor.
    • 14.07.02.91 - Diwa No.601-1 Mannheim with black leather sleeve. Promo (on sleeve and back): Engineers & Scientists Guild, Lockheed Section.(Skunk Works). Note: workers quit the union in Dec 1998.
    • 14.07.02.92 - Guedon Plastic pocket, with scale. Made in France. Bright plated cursor frame. Promo: The Everstick Anchor Co. Fairfield, IOWA.Brown leather sleeve.
    • 14.07.02.93 - Guedon Plastic pocket, with scale. Made in France. Narrow metal cursor frame. Promo: Builders Iron Foundry, Providence , Rhode Island. Brown leather sleeve.
    • 14.07.02.94 - Guedon Plastic pocket, with scale. Made in France. Folded plastic film cursor. Brown leather sleeve. Note to Mike: May be a duplicate look for the other.
    • 14.07.02.95 - K&E 4098 sn34544. Cracked stock. Brown leather sleeve. VERY FRAGILE.
    • 14.07.02.96 - Davis Instruments Inc. T-S-D Computer.
    • Books, Instructions, Manuals and ephemera, too numerous to list.
    • 14.07.02.96 - Dietzgen N1731 Micromatic Trigonometric Type Log Log sn084303
    • 14.07.02.97 - Sandia Corp Cumulative Binomial Distribution Computer with Instructions
    • 14.07.02.98 - Acu-Rule model 100 early Festus, MO
    2014.06.12.01 - Received donation of The Small Calculator, from Gretchen S. Lebrun (Canada) and Jonathan Small, grand children of Gilbert Small.
    2014.06.11.01 - Received donation of Post 1460 Versalog in Retail Box, from Bill Geren who purchased it in 1969 for $18.30USD
    2014.05.29 - Charvoz-Roos - Added its own a separate gallery.
    2014.05.29 - United States - Removed Charvoz-Roos catagory, which has been made its own gallery.
    2014.05.29 - United States - Added background information and photos of Gilbert Small, inventor and manufacturer of The Small Calculator
    2014.05.28 - Received two Gunter's scales from Clay Castleberry.
    • 14.05.28.01 Gunter's scale, Two foot, Belcher Bros & Co. New York
    • 14.05.28.02 Gunter's scale, Two foot, Unknown Maker
    2014.05.25 - United States - Added catagory "Science Services, Inc." which made the Things of Science series for young people. Added Things of Science Unit 273.
    2014.05.25.01 - Rarities - Added Cook No.2078 4-sidedEverrde Type box excise rules and Ivory Sector (no maker's mark). Gift of Philip Rodley, Upperhutt, New Zealand. Added ascession numbers to others.
    2014.05.23.01 - Acquired E.TATA pocket bamboo manheim slide rule
    2014.05.23 - Dietzgen - Added 1725 Maniphase Multiplex Vector Trig Type Log Log sn 113981. Gift of Philip Rodley, Upperhutt, New Zealand. Added ascession numbers to others.
    2014.05.23 - Faber - Added 1/28 Super Business and Manual. Gift of Philip Rodley, Upperhutt, New Zealand.
    2014.05.22 - Faber - Added 1/87A Rietz with Addiator and Manual; 375 Rietz with RR-track scales and Manual. Gifts of Philip Rodley, Upperhutt, New Zealand.
    2014.05.22 - Nestler - Added(Replaced) No37 Electro (S254), No28A 50cm Stadia 400g rule, No0290 Polymath Duplex
    2014.05.20 - Received donation from Pascal Garnier, France, now a Friend of the Museum.
    2014.05.20 - SR_Links - Added Steve's Slide Rules online collection. Steve Seale, Nashville. Tennessee
    2014.05.05 - United States - Added Avol-Rule for Earthworks computation, belonging to Philip Hazen with picture and Bio by Ruth Hazen, Washington, DC.
    2014.05.01 - Received slide rule donations from Phillip Rodley, Upperhutt, New Zealand.
    • 14.05.01.01/M313 - Castell 1/87A System Rietz with Addiator dc55-2. rectangular green cardboard sleeve Instructions.
    • 14.05.01.02/M311 - A.W. Faber Castell 375 System Rietz dc7-10. Made in Bavaria. RR Track scales. Oval black cardboard sleeve. Marked J.H.N. Haigh, M.NZ.I.C.W., Instruction for 361. Very ragged, almost remnants.
    • 14.05.01.03/M312 - Faber Castell 1/28 Super Business dc11-07. In Green and clear hard plastic case with flip top. With Instructions.
    • 14.05.01.04 - Dietzgen 1725 Maniphase Multiplex Vector Trig Type Log Log Rule, sn 113981. Conversion Tables insert. Rotted leather sleeve (tossed).
    • 14.05.01.05 - Bone Sector - no maker.
    • 14.05.01.06 - 4-sided Cook Maker, No. 2078. Soho, London. boxwood excise rule.
    • M314 - The Slide Rule, for Students of Science and Engineering by Ward and Blakely, for the Technical branches of the (British) Army
    2014.04.31.01/M310 - Received donation of Avol-Rule, belonging to Philip Hazen with picture and Bio by Ruth Hazen, Washington, DC.
    2014.04.30.01 - Received donation of L-M radio Transmission Rule, designed by Emory C. Curtis (1953), gift of Ellen Emmerich. Used by Father on the VJ101
    2014.04.21.01/M315 - Acquired Things of Science, Computation Unit #273 with Engineering Instrument pocket slide rule and workbook, Napiers Bones chart.
    2014.04.18.01 - Acquired gold with white slide rule tie clasp
    2014.04.14 - Calculators - Corrected images and description for TI SR-10 model 2. Donated by Jeff Illsman.
    2014.04.08 - Pickett - Added Model 3-T (Magnesium), Dual Base Log Log, transitional model. Scan provided by Olivier Cassou collection of France.
    2014.03.09.01 - Acquired Nestler Nr0290 duplex slide rule c1977 .
    2014.03.06 - Nestler - Added Albert Nestler 23R pocket C. Hamann Collection, Germany.
    2014.03.06 - SR_Rescue - Terence Meers of South Daytona, FL Adopted a slide rule, with extra donation 13.00.00.01
    2014.03.03 - SR_Home - Added manufacturers banner to Gallery menu and country banner to Library menu.
    2014.03.02 - Home - Removed promo for 2014 Oughtred Society Winter Meeting in Las Vegas. Now past.
    2014.03.01 - Aerospace and Ephemera - Revised description of Wernher von Braun and Sergie Korolev's slide rules. A closer look revealed they are Nr37 Electros, rather than Nr.23 Reitz. The question was raised by Jürgen Nestler in Germany.
    2014.03.01 - Aristo - Added Aristo Nr0971 Hyperbolog dc2FX4, and Aristo-Stahlbeton Nr939/n=10 System Gottsch. Acquired from Brazil
    2014.03.01 - Nestler - Added Nestler 12b pocket with magnifyer.
    2014.02.28.02 - Acquired Albert Nestler 37 Electro c1941. Same as used by Sergei Korolev and Wehrner von Braun. from Europa, Bulgaria
    2014.02.28.01 - Acquired c1930 Nestler 28a 50cm Stadia slide rule from Sofia, Bulgaria
    2014.02.27 - BRL/Blundell - Added Blundell Harling P3867 Voltage Drop Calculator. Steve Seale Collection
    2014.02.27 - PIC/Thornton - Added F1500 Black Body Radiation Slide Rule, Admiralty Research Laboratory, Tennington. Steve Seale Collection
    2014.02.26 - Calculators - Added Sharp EL-429 Sorokaru (Soroban-Calculator) sn44Y c1984
    2014.02.25 - Calculators - Corrected Soviet (Russian) Elecktronika MK33 CCCP sn887296-8904 (V2) description, based on input from Sergei Frolov' Soviet Digital Electronics Museum in St.Petersburg, Russia.
    2014.02.24 - NEWS - Mike Konshak, the ISRM curator, has been elected to the Oughtred Society board of directors. Mike has been the webmaster of the OS since 2009.
    2014.02.24.01 - Acquired Albert Nestler No.14/3 "Rietz with reciprocal scale and three hairlines" mahogany slide rule.
    2014.02.22 - Graphoplex - Added CALCRUDE Oil Viscosity Slide Rule, Scan by Phil Stanley Collection
    2014.02.22.02 - Acquired Albert Nestler No.12b pocket slide rule with magnifier from Sofia, Bulgaria.
    2014.02.22.01 - Received Albert Nestler No.28 Universal Stadia slide rule from Dick Rose, Ohio. Missing side lens for K and A scale, restored by curator.
    2014.02.21 - Nestler - Added No.24 50cm System Rietz in Metal Hard Case (German Army WWII).
    2014.02.20 - SR_Terms/encyclopedia - Added "Earth Scale" used on Chinese Stadia slide rules.
    2014.02.20 - Orient - Added Haiou Pai 6531 and Haiou Pai catagory. Added SIDA Ruyi 1001. Flying fish 1004 Vector, 1004 Stadia, 1016 HVAC, and Metalworking. Scans provided by Steve Seale.
    2014.02.19 - Nordic - Added CARID category and CARID 3000 Denmark Log Log Decitrig Duplex. Scans from Steve Seale collection.
    2014.02.19 - EastEurope - Addeded Logarex 27402-X Elektro and Logarex 27730 Gas Combustion. Scans from Steve Seale collection.
    2014.02.19 - Germany - Addeded VEB Mantissa Natural Gas Combustion and VEB Mantissa Feutron Klima 1802 (Climate & Humidity SR). Scans from Steve Seale collection.
    2014.02.18 - Nordic - Added J.H. Weil Polylog 1140 Duplex, UTO 931U. Scans from Steve Seale collection.
    2014.02.18 - Germany - Added Veb Mantissa Variant_II 1731-573/4, Staedtler 944-28, 544-08, Reiss 3227 Duplex and 3223 Progress. Scans from Steve Seale collection.
    2014.02.15 - Australia - Added MICADOR pocket slide rule, made by Santok in Japan.
    2014.02.15 - MiscJapan - Added Fuji 1280 Duplex LogLog. Scan provided by Steve Seale collection.
    2014.02.14 - Australia - Added MICADOR section with model 60, Rod lovette Collection, and model 530, Scans from Steve Seale collection.
    2014.02.14 - Nestler - Added 290 Polymath and 297 Electronic I Duplex . Scan by Steve Seale Collection. Nashville, Tennessee
    2014.02.14 - Post - Added 1491 Chemical Duplex (same as Hemmi 257). Scan by Steve Seale Collection. Nashville, Tennessee
    2014.02.13.01 - Ricoh - Acquired and added Jason 803 Log Log Duplex Deci-Trig dc N.S-3, (1965)with sleeve
    2014.02.12 - SR_Library/Post - Added Dietzgen 1797M The Slide Rule Manual - Instructions for Using The Midget Slide Rule
    2014.02.12 - Nestler - Added Rare Albert Nestler No31 Timber Slide Rule (Nr.31 Nestler Holzhandler Rechenschieber - Dieser Rechenschieber) from Slovenia
    2014.02.12 - Lawrence - Added(Replace) Engineering Instruments 250-BT (S032) New all plastic cursor. Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.12 - ForSale - Added Dietzgen 1797M (Gilson Midget) circular slide rule to Slide Rule Rescue
    2014.02.12 - Acumath - Added(Replaced) U.S. No. 1500 LogLogDecimalTrig (ISRM 13.07.03.02) with sleeve. Added No600 with Yellow Stock. HSRC 50071
    2014.02.12 - Faber - Added(Replaced) 57/22 Business (S288) dc 11-05 clear hardcase. Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.12 - Nordic - Added(Replaced) UTO 601 Hoffman (P133) Raymond Concrete promo. Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.12 - Pickett - Added Pickett 120 Trainer Instructions and Ascession number Estes entry.
    2014.02.12 - SR_Library/Post - Added Form AF-198 - How to use your Post slide rule. For models 1452W, 1447, 1444K, 1441.
    2014.02.12 - Concise - Added(Replaced) Sama & Etana 600 with CE Insert (1968 Concise) Promo:General Electric. with manual blue sleeve. replace C036
    2014.02.11 - SR_Library/Japan - Added Hemmi P280/P281 Instructions. Belonged to Mary Northcote in England.
    2014.02.11 - Aristo - Added Aristo 109 50cm Rietz. Belonged to Donald Henry Northcote. Gifted by his daughter, Jane Northcote.
    2014.02.11 - Blundell - Added BRL AL4. Belonged to Donald Henry Northcote. Gifted by his daughter, Jane Northcote.
    2014.02.11 - Hemmi - Added Hemmi P281 with manual. Belonged to Mary Northcote. Gifted by her sister, Jane Northcote.
    2014.02.11 - Thornton - Added(replaced) Thornton P271 Log Log (S276). Gifted by Jane Northcote.
    2014.02.11.02 - Acquired Aristo Nr0971 Hyperbolog dc2FX4. Acquired from Brazil
    2014.02.11.01 - Acquired Aristo-Stahlbeton Nr939/n=10 System Gottsch. Acquired from Brazil
    2014.02.10 - Received donation of slide rules from Jane Northcote, of the United Kingdom, used by herself, her Father Donald Henry Northcote (1921-2004) and her sister Mary Northcote (1958-), including biographies and photos.
    • 14.02.10.01 - Aristo 109 50cm System Rietz, dc432 (Feb, 1943) version 1 Made in Germany. Has cracked stock (repaired with Cynoacrylate). Missing backside trig hairline.
    • 14.02.10.02 - BRL AL4 Made in England with cardboard sleeve
    • 14.02.10.03/M309 - Hemmi No. P281 dcUC with blue&Gray plastic shell with instructions for P280 & P281
    • 14.02.10.04 - British Thornton No. P271 gray hard plastic shell
    2014.02.10 - Faber - Added A.W. Faber 369 pocket slide rule. Hermann's slide rule catalogue.
    2014.02.10 - SR_Rescue - Brad Clements of Potsdam, NY Adopted 4 slide rules.
    2014.02.10 - Friends - Added Brad Clements and Leonard Woolsey to Financial contributors, now Freinds of the Museum.
    2014.02.09.02 - Acquired Nestler No.12a 0f 1915, 15cm. SIEMENS-SCHUCKERT in well.
    2014.02.09.01 - Acquired Nestler No.24 50cm System Rietz in Metal Hard Case (German Army WWII) broken glass. 2014.02.09 - Sterling - Added(Replaced)two early models of Sterling 584 with two molded braces. One with model number (S446). Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.09 - Germany - Added Staedtler 544-55 Rietz-Scolaria (Feb 1962). Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.08 - SIC - Added(Replaced) 1520 sn40157 (S516) SIC 1520 Multiphase DecaTrig. Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.08 - Graphoplex - Added Koh-I-Noor 10000 LogLog Duplex Neperlog. Gift Of Bill Wehrend Collection, Palo Alto, California.
    2014.02.08 - Post - Added 1444K (rebranded Hemmi 34RK) MIOJ 1945-1952. 1444-D (cWWII - Made In USA), 1447P Duplex dc SI (Sep 1968), 1462 White plastic braces (replaces S074). 1450 Versatrig dcVE(1971).
    2014.02.08 - SR_Terms/Encyclopedia - Enhanced "Made In Occupied Japan" description, and added "Made In Occupied Germany".
    2014.02.07 - Hemmi - Added(Replaced) 256 (S033), 2634 MIOJ Pocket (P137) with biography and photo of original owner, Arthur McCusker (1931-2013) of Boise, Idaho.
    2014.02.07 - K&E - Added(Replaced) KE_68-1497_sn920128 (S381), KE_4161-3_sn220819 (s164), 4097-B sn92902, KE_4055_Favorite_sn948951(S451).
    2014.02.05 - Pickett - Added 1010-ES Transitional model, aluminum with nylon cursor, but with magnesium style braces. Rare sleeve.
    2014.02.04 - SR_Library/Pickett - Added Pickett 160 instruction sheet
    2014.02.04 - Pickett - Added 160 Microline, CI scale in italics, with instruction sheet. N200-ES Pocket Trig Round Black Logo, curved braces (transitional hybrid model).
    2014.01.03 - United States - Added Key Line catagory and Key Line's Concise Circular Slide Rule
    2014.02.03 - Pickett - Added Model 200 magnesium with retail box and ephemera. Has Shell Chemical logos. Model 1010 sn2C40913 with box, DIEPO label.
    2014.02.02 - Blundell - Added BRL T.50, Blundel Harling T-50, 506 Academy, A504 Super Duplex. Scan provided by Steve Seale of Nashville, Tennessee.
    2014.02.02 - United Kingdom - Added WH Smith A505 and WH Smith & Son LogLogTrig. Scan provided by Steve Seale of Nashville, Tennessee.
    2014.02.02 - Unique - Addded Navagational Slide Rule. Scan provided by Steve Seale of Nashville, Tennessee.
    2014.02.02 - SR_Library/Pickett - Added Pickett Insert Form 270 - How To Adjust Your Slide Rule c.1949
    2014.02.02 - United States - Added Pickett 1010 to Dieterich-Post section of gallery. Added DIEPO logo. Image from Meeker's Patented-Antiques.
    2014.02.02 - Germany - Added REWA 10M Rechenwalze Cylindrical Slide Rule. Photo by Ed Chamberlain collection.
    2014.02.02 - France - Added Appoullot T2 and T3 spiral slide rules. Ed Chamberlain collection.
    2014.02.01 - SR_WhosWho - Added Steve K. Seale of Nashville, Tennessee.
    2014.02.01 - Ricoh - Added Staedtler Mars 944-28; Relay DE-1008, DT-1065; Ricoh 151; and Lutz 300B. Scans provided by Steve Seale of Nashville, Tennessee.
    2014.02.01 - Germany - Added Staedtler Mars 944-28, Scan provided by Steve Seale of Nashville, Tennessee.
    2014.02.01 - SIC - Added Model No. 151 Multi Log, Scan provided by Steve Seale of Nashville, Tennessee.
    2014.01.31.01 - Received Pickett Model 1010-ES 7ft Demonstration slide rule )modern logo), Gift of Jim Rohloff, Scot Jaynes,, Laura Robertus, Chuck Stewart, Aaron Schultz of Praxair Inver, Grove Heights, Minnesota Plant
    2014.01.29 - Ephemera - Added photo from 1968 yearbook of the Math club at Wheatridge High School in Colorado. Courtesy of Don and Cindy McCoy, Silverthorn, Colorado.
    2014.01.29 - SR_Library/USA - Added M299 Fullerton 1450 Acudial (Concise No. 28N) Circular Slide Rule Instructions, Gift of Bill Wehrend Collection.
    2014.01.29 - United States - Added Bruning 2398 5inch duplex sliderule, Bruning 1958, logo and place markers for known Fullerton circular slide rule models. Lacking images.
    2014.01.24 - Circular - Moved all Concise Circular Slide Rules and variants like Sam & Etana to the new Concise gallery.
    2014.01.24 - Gallery - Added new gallery dedicated to Concise Circular Slide Rules. Concise is made by K.K. Konsasu, Tokyo, Japan.
    2014.01.24 - United States - Added new section for Fullerton Sales Company. Includes rebranded Concise and Acumath slide rules.
    2014.01.24 - Acumath - Moved Fullerton-Acu to MiscUSA United States gallery under its own section.
    2014.01.23 - Germany - Added Instructions to IWA 0272 Muiderkring-electronic-English. Scan By David Walker, UK
    2014.01.23 - SR_Library/Dietzgen - ISRM M298 Dietzgen 1797M Gilson Midget Binary Instructions. Gift of Bill Wehrend Collection.
    2014.01.23 - Ricoh/Relay - Added Alvin 1157 Elite Vector Log, scan provided by Steve Seale of Nashville, Tennessee.
    2014.01.22 - SR_Library/Japan - Added M297 Key Line (Concise No. 28N) Circular Slide Rule Instructions, Gift of Bill Wehrend Collection.
    2014.01.22 - SR_Library/British - Added M294 and M296 Otis King Cylindrical Slide Rule Instructions. The former a gift of Phillip Rodley, New Zealand.
    2014.01.21 - SR_Library/Euro - Added Faber-Castell 1/28 Super Business Instructions, Scan By Lew Solomon in New Zealand.
    2014.01.15 - Hemmi - Added 256 Communications Duplex dcDG, and Hemmi 2634 MIOJ, with bio anf photos of original owner Arthur McCusker (1931-2013).
    2014.01.14.01 - Received Albert Nestler No31 Timber Slide Rule (Nr.31 Nestler Holzhandler Rechenschieber - Dieser Rechenschieber) from Slovenia
    2014.01.13 - KE_Standard - Added Robert J. Olson (1913-2006) bio and portrait to 4092-3 sn 422878 the original owner.
    2014.01.13 - Search - Replaced search engine. Trying new things like removing background, going to white.
    2014.01.10 - Received 85 slide rules re-gifted by Jim Wall of the Museum Of American Heritage, Palo Alto, California, part of a gift fom the Bill Wehrend Collection. New additions or replacements to the galleries will be listed below as accession numbers are assigned, and later scanned. 46 Duplicates will be found in the Slide Rule Rescue - Adopt-a-Slide Rule fund raiser gallery. 7 were added to the loaner program.
    2014.01.10 - Received numerous slide rules from William R Wehrend II Collection.
      Additions/replacements For Gallery
    • 14.10.10.01/M302 - Pickett 200-ES magnesium, black round Pickett logo, Shell Logo. Missing 1 stator screw. In Retail box with manuals and docs 5.0
    • 14.01.10.02 - Post 1444-D Commerce pocket WWII with red leather sleeve.
    • 14.01.10.03 - Post 1444-K/Hemmi 34RK Pocket Made in Occupied Japan dc.
    • 14.01.10.04 - K&E 4097-B sn92902 pocket with leather sleeve.
    • 14.01.10.05 - UTO 601 Hoffman Promo:Raymond Concrete Pile Division.
    • 14.01.10.06/M299 - Fullerton Acudial No.1450 V1 Circular Concise 28N Beck: Concentric conversion table. Black sleeve. Wrap- around cursor. Fullerton Instructions.
    • 14.01.10.07 - Fullerton Acudial No.1450 V2 (red label) Circular Concise 28N with conversions on back. One sided cursor. Back: Radial conversion table. Yellow sleeve.
    • 14.01.10.08/M297 - "Key Line" Concise 28N Circular (no brand label). "Key Line" Re-branded Instructions. One sided cursor. Back: Radial conversion table. Black sleeve. Dole Company Promo.
    • 14.01.10.09/M298 - Dietzgen (Gilson) Midget. Green background. Instructions. Green sleeve. To fun raiser.
    • 14.01.10.10 - General Industrial Slide Rule, Circular. 1959 Slide-chart Corp.
    • 14.01.10.11 - Sama & Etana 600 with CE Insert (1968 Concise) Promo:General Electric. with manual blue sleeve. replace C036 Hooker
    • 14.01.10.12 - Post 1462 white braces c1945 replace S074
    • 14.01.10.13 - Post 1450 Versatrig dcVE (May 1971), Black Leather sleeve
    • 14.01.10.14 - Post 1452W Universal dcJL (Dec 1959), Same as Hemmi 50W. No sleeve.
    • 14.01.10.15 - K&E 4055 Favorite sn948951, New Improved Cursor (has KERCS Cracks, need to reinforce). Perfect case.
    • 14.01.10.16/M303 - Post 1447P dcSI (Sep 1968)New style all plastic Hemmi, Grey Back Braces. Red cardboard sleeve. Manual.
    • 14.01.10.17 - Engineering Instruments 250-BT all plastic cursor. Replacement.
    • 14.01.10.18 - Staedtler-Mars No.54455. Rietz-Scolaria. dc262 (Feb1962) Dirty. Clear/green vinyl sleeve.
    • 14.01.10.19 - Koh-i-noor 10000 Log Log Duplex. (Graphoplex Neperlog) Black leather sleeve (shrunk too much to put slide rule in).
    • 14.01.10.20 - Faber-Castell 57/22 Business dc 11-05 clear hardcase. Replaces S288
    • 14.01.10.23/M308 - Pickett 160 Microline, CI scale in italics
    • 14.01.10.40 - K&E 68-1497 sn920128. Exposed mahogany Laminated edges. black leather case. Replace S381.
    • 14.01.10.41 - K&E 4161-3 sn220819 Simplex. Nagauhyde sleeve, Green Retail Box.
    • 14.01.10.42/M304 - Pickett 1010 Trig sn 2C40913 DIEPO with manual and retail box - swap with ISRM 12.11.22.03 sn3004548.
    • 14.01.10.43 - SIC 1520 Multiphase DecaTrig - S/N 40157 Leather sleeve. Name: Ed Zimmer. Replace S516.
    • 14.01.10.44 - Acu-Math 1500 Log Log Decimal Trig U.S., Leather sleeve. Replace ISRM 13.07.03.02 (has corrosion)
    • 14.01.10.45 - Pickett N4-ES Vector Type LogLog DualBase SpeedRule Square braces Circumscribed Triangle Logo, 1959-1962, Leather sleeve.
    • 14.01.10.47 - Pickett N903-ES Trig and Conversion, flat lens, extended cursor bars, rnd blk logo, grey naugahyde sleeve.
    • 14.01.10.48 - Pickett 1010-ES - Transitional model with -ES, New extended nylon cursor bars, flat lens, Old rounded braces, grooved slide. soft Brown leather sleeve w/offset snap.
    • 14.01.10.49 - Pickett N902-T Simplex Trig, 1962, Round Black logo, wide cursor, convex lens, concave braces, black naugahyde sleeve.
    • 14.01.10.70 - Sterling 584 white Rare First Early Version with model number. 2 bridges. Replace S446
    • 14.01.10.71 - Sterling 584 white Rare 2nd Early Version no model number. 2 bridges. New addition.
    • 14.01.10.79 - Relay No.102 Mannheim, dcI.K-2 (1960), Missing cursor. ISRM has a spare frame but must make the lens fron a S.I.C. lens.
    2014.01.10 - Sterling - Added Sterling 566 DIAL-A-MATIC Adding Machine Pencil Box. Ebay photo
    2014.01.10 - Circular - Added Radiac Nuclear Yield Calculator Set ABC-M28A1 - Two Disk set, Ebay photos by Baja_Ron. (look at end of page)
    2014.01.09.02 - Acquired Hemmi 2634 MIOJ, Original owner Arthur McCusker (1931-2013).
    2014.01.09.01 - Acquired Hemmi 256 Communications Duplex dcDG, and Hemmi 2634 MIOJ, Original owner Arthur McCusker (1931-2013).
    2014.01.09 - K&E_Standard - Added background information on K&E 4081-3 S/N 365785 1948. The sleeve had the name of Jean Jolkovski, and the ISRM researched and found him living in Phoenix, at 87 years old. Jean said this slide rule was issued to him as part of the GI Bill, but was stolen in 1940 at Ohio Univ.
    2014.01.08 - K&E_Standard - Added(Replaced) 4093-3 sn322624 1930 (S049) . Swapped Improved Cursor with KERCS for an All glass cursor (look-a-like) made by S.I.C. (Ricoh) 1960. Gift of Dan Swerdlow, Bethesda, Maryland.
    2014.01.08 - SR_WhosWho - updated John Mosand (1935-2013) of Trondheim, Norway who passed away in 2013.
    2014.01.07 - Post & KE - Added missing accession numbers to ISRM slide rules in galleries.
    2014.01.07 - Faber - Added missing scan of A.W.Faber 1-87 Syst. Rietz dc43-8 Donated By Raymond Du Bois.
    2014.01.07.01 - K&E_Standard - Added 4092-3 sn149441 (1926)w/Times Roman font scale labels. Swapped All glass cursor from 4092-3 sn399224.
    2014.01.06 - Nordic - Added Diwa 111 Electro and 301 Rietz. Gift of Phillip Rodley, Upperhutt, New Zealand.
    2014.01.06 - SR_Library/Euro - Added 2 instructructions for Diwa 111 and 301. Gift of Phillip Rodley, Upperhutt, New Zealand. repaired several broken links.
    2014.01.06 - Hemmi - Added(Replaced) 8inch No.P23 and 2664S dcTG July 1969 Business Rule (S022). Orig owned by a M.W.Baker, Gift of Phillip Rodley, Upperhutt, New Zealand
    2014.01.06 - Post - Added 1444K w/Magnifying Cursor dcOD (April 1964) & Leather pocket sleeve, Gift of Phillip Rodley, Upperhutt, New Zealand
    2014.01.06 - Pickett - Added N400-T and 400-ES, courtesy of Greg Scott collection
    2014.01.05 - SR_Library/Pickett - Added 2 more versions of Model 400 Business Slide Rule Manuals, scans by Greg Scott Greg's Slide Rules
    2014.01.05 - Pickett - Added(Replaced) Model 400-T Business Rule (P075) Gift of Phillip Rodley, Upperhutt, New Zealand
    2014.01.05 - Faber - Added(Replaced) 378 Electro (S120) Gift of Phillip Rodley, Upperhutt, New Zealand
    2014.01.05 - Ephemera - Added 1957 K&E receipt for 4081-3. Sold for $29.95
    2014.01.05 - SR_Library/Euro - Added Tavernier-Gravet Notice Sur Ĺemploi des Reglas a Calcul Scan By Gonzalo Martin
    2014.01.05 - SR_Library/K&E - repaired links to : Brochure: A Slide Rule With Intellect And Horse Sense (2.31MBpdf)
    2014.01.05 - K&E_Standard - Added accession numbers to Martha prince gift entries.
    2014.01.03 - K&E_Standard - Added(Replaced) 4092-3 (S049) Log Log Duplex Vector S/N 422878 Reinforced all glass Cursor
    2014.01.03 - Received gifts of slide rules from Phillip Rodley, Upperhutt, New Zealand
    • 14.01.03.01 - A.W. Faber 378
    • 14.01.03.02/M293 - Diwa No.301 Rietz dc36 in Retail box
    • 14.01.03.03/M294 - Otis King Model K, Type A 1940
    • 14.01.03.04 - Hemmi 2664S, owned by M.W. Baker
    • 14.01.03.05 - Pickett 400 Business Slide Rule
    • 14.01.03.06 - Post 1444k dcOD in Leather sleeve
    • 14.01.03.07 - Hemmi P23 - Brace on stock was repaired by user
    • 14.01.03.08/M295 - Diwa No.111 Electro dc36 in Retail box, Owner M.P.Armstrong 1950
    2014.01.01.01 - Received acquisition of K&E 4093-3 Log Log Duplex Vector S/N 422878 Reinforced all glass Cursor

    2013.12.25 - SR_Library/Books - Added complete scan of Mathematics Made Easy - 1941 and partial scan of Simplified Mathematics For Daily Use an How To Use the Slide Rule - 1943, both by Frank A. Rapport
    2013.12.25 - France/Belgium - Added Section on Lenoir, with scans from the Etieńne Pommel Collection
    2013.12.25 - SR_WhosWho - Added photo for Marc Thomas, Nantes, France and additional bio info
    2013.12.25 - Aristo - Added Aristo 10065 System G¨ter ©1952 Image By Gonzalo Martin's PhotoCalcul.com, France
    2013.12.25 - SR_dates - Expanded Hemmi timeline
    2013.12.24 - Hemmi - Added J. Hemmi Model 6, 150mm[6inch] (1914-1929) Pocket stock slide rule, in case
    2013.12.22.M292 Received and scanned acquisition of Simplified Mathematics For Daily Use an How To Use the Slide Rule By Frank A.Rappolt ©1943
    2013.12.22.M291 Received and scanned acquisition of Mathematics Made Easy By Frank A.Rappolt ©1941
    2013.12.21.01 - Received acquisition of Sun Hemmi Model 6, 150mm[6inch] (1914-1929) Pocket stock slide rule, in case
    2013.12.21 - Faber - Added A.W.Faber 1/98/398 Elektro dc38-4 (1938). made of Pearwood. Acquired out of Australia.
    2013.12.20 - Nestler - Added photo of No. 21 Timber slide rule, c1938. Photo contributed by Matej Marka, Slovenia.
    2013.12.19 - Received gift from Kevin Ward of Texas, now a Friend of the Museum
    2013.12.17 - Received gift from Blaine Mogil of California, now a Friend of the Museum
    2013.12.13 - Received gift from Vegard Valberg of Norway now a Friend of the Museum
    2013.12.12 - SR_WhosWho - Added José Gabriel Fernández of Santa Creuz, Spain.
    2013.12.12 - Faber - Added Faber-Castell 2/84 Mathema, 2/84N Mathema, 378 Elektro, Verlag Chemie, 342 Business Instructions to respective specimens.
    2013.12.12 - SR_Library/Europe - Added Faber-Castell 2/84 Mathema, 2/84N mathema, 378 Elektro, Verlag Chemie, 342 Business Instructions. Scans courtesy of Jorge Fabregas'sreglasdecalculo.com, Spain
    2013.12.11 - Faber - Added Faber-Castell 379 Elektro, used on the design of the Hell Gate Power Sation, Brooklyn , New York, in 1921, and a reference scan of the same rule courtesy of Jorge Fabregas'sreglasdecalculo.com, Spain
    2013.12.10 - Website cleanup - Removed, replaced or corrected 139 broken links over 441 pages.
    2013.12.12 - SR_Library/Europe - Added Faber-Castell 2/84 Mathema, 2/84N mathema, 378 Elektro, Verlag Chemie, 342 Business Instructions, courtesy of Jorge Fabregas'sreglasdecalculo.com, Spain
    2013.12.10 - Website cleanup - Removed, replaced or corrected 139 broken links over 441 pages.
    2013.12.09 - UnitedStates - Added Gilbert Small pocket slide rule to its own catagory, with Patent info. Images from Nathan Zeldes Collection
    2013.12.09 - Circular - Added(Replaced) Gilson Midget, 1919 (C39) and manual and catalog from 1922.
    2013.12.08 - Relay/Ricoh - Added Alvin 1150 Elite Desilog dcI.K-4 (1960). Note first artwork, as 'Desilog' a misspelling, it should have been 'Decilog' as shown in another specimen.
    2013.12.08 - KE_Standard - Added(Replaced) 4088-1 sn54037 (P103) dated 1923, Marked 'XMAS 1923' a gift from the 'McKinneys'
    2013.12.08 - Nestler - Added Albert Nestler A-G No.41 Pocket 1923
    2013.12.08 - Faber - Added1/54 Darmstadt dc870 Aug 1970 (V2). Added notes to existing Import 1/54 (V1) and improved look of the image..
    2013.12.08 - Faber - Replaced 2/83 Insert (English) image, donated by Phillip Rodley, with higher resolution image, at the request of Bruce E. Van Deuson.
    2013.12.07.01 - Received acquisition of Faber Castell 1/98/398 Electro slide rule, RR track divisions, metal cursor, in case Name on stock: W.Craick, dc38-4, was in Australia
    2013.12.07 - British - Repair a broken link to Otis King Images
    2013.12.06 - Pickett - Added Model 400 Business Magnesiujm stock Rule, Model 902-T with Diecast braces and cursor blocks
    2013.12.05 - SR_WhosWho - Expanded Burns Snodgrass (1886-1954) entry, founder of Unique Slide Rule Company.(1920-1993).
    2013.12.05 - SR_dates - Added Unique Slide Rule Company timeline to bottom of page
    2013.12.05 - Unique - Added Unique Slide Rule Company history to top of page
    2013.12.03.05 - Received acquisition of Pickett Model 902-T (1957) DieCast braces and cursor blocks, in leatherette sleeve
    2013.12.03.04 - Received acquisition of Pickett Model 400 (1945) Magnesium stock slide rule, in leather case
    2013.12.03.03 - Received acquisition of Faber Castell 1/54 Darmstadt slide rule, all plastic cursor, in case dc870-54
    2013.12.03.02 - Received acquisition of 4" Albert Nestler slide rule, cracked glass
    2013.12.03.01 - Received acquisition of Alvin (Ricoh) Desi Log Elite No 1150 dcI.K-4 (
    2013.11.24 - MiscUSA - Added a Charles Bruning 2406, ebay photo.
    2013.11.23.01 - Received acquisition of Gilson Midget circular slide rule, first version from Niles, Michigan, with two booklets, Instructions and a sales catalog.
    2013.11.22.01 - Received acquisition of K&E 4088-1 sn 54037 duplex slide rule, Marked 'XMAS 1923' a gift from the 'McKinneys'. 1st Owner SNODGRASS. 2nd Owner O. Rittmaster, R.E. 4296
    2013.11.20 - MiscUSA - Added a hyperlink index to manufacturers in this gallery at top of page.
    2013.11.20 - MiscJapan - Added Hope 51, Hope 53, Hope 54 and Hope 57 images from the ISRM Hermans Slide Rule Catalogue.
    2013.11.20 - MiscUSA - Moved the Mead Corporation catagory from Misc Japan, as this was an USA company distributing rebranded Japanese slide rules. Added logo and historical data.
    2013.11.20 - MiscJapan - Added Kutsuwa 10 inch slide rule, gift of Phillip Rodley, NZ and added logos for Kutsuwa.
    2013.11.20 - Circular - Added(Replaced) Mascot Vest Pocket Circular Slide Rule (C28), with case and Instructions.
    2013.11.20 - SR_Library/General - Moved several documents, Richardson, Mascot, Gilson, to the SR_Library/USA
    2013.11.20 - SR_Library/Japan - Added ISRM M287 Kutsuwa Instructions, Gift Of Phillip Rodley, NZ
    2013.11.20 - SR_Library/USA - Added ISRM M288 Mascot Vest Pocket Slide Rule ©1934 TavellaSalesCo
    2013.11.20 - SR_Library/Books - Added ISRM M286 How To Use The Slide Rule Forum House ©1968, Gift Of Phillip Rodley, NZ
    2013.11.19 - Received donation from William Priestley, now a Platinum Friend of the Museum.
    2013.11.05 - Received Gifts of slide rules acquired by Phillip Rodley, Upperhutt New Zealand
    • 13.11.05.01 - WE&F Newton Ivory Sector
    • 13.11.05.02/M287 - Kutsuwa 10 inch Mannheim, with Instructions and conversion Insert
    • 13.11.05.03 - Hemmi 64 Occupied Japan. Gift of Lew Solomon and Phillip Rodley
    • 13.11.05.04 - A.W. faber 368 Electro, rare cursor
    • M286 - How To Use The Slide Rule Forum House Publishers ©1968
    2013.11.05 - Received Gift from Tony Pearce, now a Friend of the Museum
    2013.11.02 - Faber castell - Added image of 50cm long 4/54 Darmstadt. Courtesy of the Atsushi Tomozawa Collection, Japan
    2013.10.31 - Dietzgen - Added (replaced) 1760 Manheim (S368 and image of one at ISRM with missing cursor Donated by David Hecht) with all glass cursor, box with intact flap
    2013.10.30 - Post - Added 1460 Versalog, Date code 1954. Gift of Roberta Rosty of Saddle Brook, New Jersey. belonged to father, Stephen R. Rosty (1921-2012).
    2013.10.30 - SR_Library-K&E - Added ISRM M283 K&E 9068 Doric pocket duplex Instructions. Gift of Roberta Rosty of Saddle Brook, New Jersey.belonged to Stephen R. Rosty.
    2013.10.30 - K&E Standard - Added(Replaced) 9068 Doric pocket duplex (P004), sn 6027. Gift of Roberta Rosty of Saddle Brook, New Jersey.belonged to Stephen R. Rosty.
    2013.10.29 - SR_Library/Catalogs - Added Faber-Castell 1966 Catalog from the Hubert van Dongen Collection an ISRM Associate.
    2013.10.29 - Dietzgen - Added(Replaced) Phillips 1759B 1914-1915 (S170).Original owner has written '15 on the stock establishing the date. Very rare this happens for museum curators! Removed S300 Phillips 1759 as the K&E cursor did not provide a hairline for the side scale 'E'.
    2013.10.28 - SR_Library-Pickett - Added 1948 Model 4 Vector Hyperbolic Instructions, scan donated by Marion Moon
    2013.10.28 - K&E Added K&E 4092 Log Log Duplex Lot 74 With Magnifier (1915), K&E 4070-3 Trig ImprovedCursor sn763035 KERCS Cursor
    2013.10.26.01/M288 - Acquired Mascot Vest Pocket (2.75" dia circular) Slide Rule ©1934 Tavella Sales Co.
    2013.10.25.01 - Acquired Dietzgen Phillips with all glass cursor, box
    2013.10.24.01 - Acquired Dietzgen 1760 Manheim with all glass cursor, box with intact flap
    2013.10.22.01 - Received donation of Slide Rules from the collection of Ms. Roberta R. Rosty of Saddle Brook, New Jersey. Manual was sent 08/13. Roberta has 2 Patents: number 4,410,393 issued October 18, 1983Preparation of steel surfaces for adhesive bonding by etching with H.sub.3 PO.sub.4 -polyhydric alcohol mixture 4,835,016 Mar 28, 1988 Adhesive bonding. Both for The United States of America as represented by the Secretary of the Army.
    • 13.10.22.01 - K&E Doric 9068 Slide Rule sn 6027 (replace P004)
    • 13.10.22.02 - Post 1460 Versalog, date code EB (black CO label), With Leather case. Case Flap and Stock has name written on it
    • Sterling 587 without cursor (scrap)
    • C-Thru pocket slide rule, without slide (scrap)
    2013.10.21 - Dietzgen - Added 1762 20inch Mannheim, N1733 sn005585 gift of Phillip Rodley
    2013.10.21 - Hemmi - Added Model 259-D rebranded as Odelco, 1968. Gift of Phillip Rodley, New Zealand
    2013.10.21 - Pickett - Added(Replaced) Model 3, Magnesium stock (S549). Gift of Phillip Rodley, New Zealand.
    2013.10.21 - MiscUSA - Added(Replaced) Charvoz-Roos SR-111 (S369)
    2013.10.21 - Thornton/PIC - Added PIC 121 Electro with Plastic framed cusor. Gift of Phillip Rodley, NZ.
    2013.10.21 - Circular - Added Science Spectrum Occctal-Decimal and Hexa-Decimal slide rules, designed by Phillip Wyatt. Ref Photo by David Sweetman.
    2013.10.21 - Nestler - Added(Replaced) 2012 Manheim (S266) with metal framed cursor. Dieterich-Post/Nestler 2012 with thin film cursor.
    2013.10.21 - MiscJapan - Added Fuji No. 251 Rietz (Replaced reference image), gift of Phillip Rodley, Upperhutt, New Zealand
    2013.10.21 - Nordic - Added Diwa No.101 (Replaced reference image) gift of Phillip Rodley, Upperhutt, New Zealand
    2013.10.21 - Ricoh - Added Lafayette F686 dcJ.K-1 (Replaced reference image) gift of Marion Moon of California 2013.10.13 - MiscUSA/Dieterich-Post - Added historical background. Added Basic Mannheim, made by Nestler (model 2012 variant) for Dieterich-Post Co.
    2013.10.09 - Received gift from Colin Riley, Now a Friend of the Museum.
    2013.10.09 - Received Gifts of slide rules acquired by Phillip Rodley, Upperhutt New Zealand
    • 13.10.09.01 - DIWA 101 in Oak box
    • 13.10.09.02 - Fuji No. 251 Rietz Name on Stock: Pam Frost 55.
    • 13.10.09.03 - Odelco (Hemmi) 259D for mechanical engineer dcS?(1968) Name on Sleeve flap: Monek
    • 13.10.09.04 - 20" Faber-Castell 4/22 Business SlideRule, Pristine
    • 13.10.09.05 - Pickett Model 3 magnesium snC036119 rubber case, Name:Zim
    • 13.10.09.06 - Dietzgen N1733 sn005585 Name on Sleeve flap: Andy
    • 13.10.09.01 - PIC 121, original cursor GreenCardboardSleeve, Name on Back of stock: G.F.Webb
    2013.10.08.01 - Received gift of Lafayette F-686 Vectorlog, datecode J.K-1. Donated by Marion Moon. California.
    2013.10.07 - Received new acquisitions from multiple sources.
    • 13.10.07.01 - Bone protractor c1890, for use with sectors
    • 13.10.07.02 - A.W. Faber 379 Pocket Electro. 1908-1935
    • 13.10.07.03 - Nestler 21 Railroad track divisions. No cursor
    • 13.10.07.04 - Post Hemmi 1441 Pocket.
    • 13.10.07.05 - Albert Nestler 2012 Basic Mannheim (no model number) Metal frame cursor, Name in well of stock: Cosentio
    • 13.10.07.06 - Faber-Castell 67/87 pocket slide rule with addiator
    • 13.10.07.07 - Charvoz-Roos SR-111 Trig-O-Log, Black Leather Case
    • 13.10.07.08 - K&E 4070-3 sn763035 with leather sleeve and box one cursor block has KERCS
    • 13.10.07.09 - Dieterich-Post Co. (Nestler 2012) with thin film cursor
    • 13.10.07.10 - K&E 4092 lot74 with Magnifier All glass cursor, one broken lens .
    • 13.10.07.11 - K&E 4081-3 sn288720 KERCS
    • 13.10.07.12 - Daruma Soroban 10 digit 1x4
    2013.10.07 - United Kingdom (British) - Added Simplon Electro Log Log, image and instructions provided by Cyril Catt of Australia
    2013.09.25 - Nordic - Added Diwa Ideal No. 701 Export, Donated By Mikael Seierup, Denmark. Belonged to his father. Added reference photos of Diwa 730 Combilog. Added David Hecht bio to Diwa 911.
    2013.09.25 - United States (aka MiscUSA) - Added(Replaced) Indeco Pocket Slide Rule (P123), Henschel No. 2025 (Nestler), with missing cursor, and a n INDECO Monoface Rule from the MIT Museum K&E Archives. Charvoz-Roos 109 (same as "The Roos Company" version).Deleted S407 Charvoz-Roos SR-109.
    2013.09.25 - Library/MiscEuro - Added IWA 0272 (English) Electronic slide rule Instructions, Scan donated by David Walker, UK
    2013.09.24 - K&E - Added(Replaced) 4092-3 sn 256159 with all-glass cursor (S007), 4092-5 20" sn103094, 4081-5 20" sn860426
    2013.09.20 - Received gift from Giuseppe Bianchi of Italy, Stephen S. Treadwell (repeat donor)of Richardson, Texas, Kent E. Berglund. Ph.D. of Cary, Illinois, all Platinum Tier 1 Friends of the Museum
    2013.09.18 - Received gift from David Ogden (repeat donor)of Spain, a Platinum Tier 1 Friend of the Museum
    2013.09.18 - New Arrivals to be scanned, archived, or put up for adoption
    • 13.09.18.05 Sharp EL-429 Electronic Calculator with Soroban.
    • 13.09.18.01 Joe Klawun No. 11 (Nestler No. 2) missing cursor
    • 13.09.18.02 K&E N4053 no cursor, For adoption/scrap
    • 13.09.18.03 Pickett 120-T narrow stock. For adoption
    • 13.09.18.04 Pickett 120-T Microline, wide stock. For adoption
    2013.09.17 - Germany - Added Feinmessinstitut Joe Klawun No.25 Sys.Rietz (Dec 1938) (Faber-Castell 1/94/394)
    2013.09.17 - Circular - Added Archimedes Latt-Mayer S.A. 42-8125 circular Photo by João Roberto Gabbardo, Brazil
    2013.09.17 - Americas - Added Archimedes Latt-Mayer S.A. 42-8125 circular Photo by João Roberto Gabbardo, Brazil
    2013.09.17 - United States - Added Guedon with thin film cursor
    2013.09.17 - Faber - Added 1/60/360 and 1/94/394 Joe Klawun Sys. Rietz
    2013.09.17 - Library - Is now open again after the successful fundraiser.
    2013.09.17 - The 2013 fundraiser goal was acheived with 35 donors from 10 countries in 24 days. Thanks to all the Friends of the Museum!
    2013.09.17 - Received gift from Joseph Higgins (repeat donor) of Washington, a Platinum Tier 1 Friends of the Museum
    2013.09.17 - New arrivals to be scanned, archived or put up for adoption.
    • 13.09.17.01 Charvoz-Roos SR-109, has a cracked/chipped cursor at screw
    • 13.09.17.02 Pickett 1025 Spring Design (I love these), cast braces and cursor blocks, corroded paint
    • 13.09.17.03 Pickett N1010-ES Trig. For adoption
    • 13.09.17.04 Sterling Precision 684. For adoption
    2013.09.16 - Received gift from Marion Moon (repeat donor) of Orange, California, a Platinum Tier 1 Friends of the Museum
    2013.09.16 - SR_WhosWho - Added Étienne Lenoir - (1744-1832)Paris, France. mathematical-instrument maker
    2013.09.16 - SR_WhosWho - Added Jean-Noël Lerebours (1761-1840) Paris, France. mathematical-instrument maker and Optician.
    2013.09.16 - Sterling - Re-labeled model numbers, added manuals links,Added 3 Dial-A-Matic adding machines.
    2013.09.16 - New Arrivals to be scanned and archived.
    • 13.09.16.01 - Faber- Castell 1/60/360 dc 37-10 (Sep 1937)
    • 13.09.16.02 - Guedon 448 Pocket slide rule
    • 13.09.16.03 - Faber- Castell 1/94/394 System Rietz dc 38-12 (Dec 1938)
    2013.09.15 - New Arrivals to be scanned and archived or put up for adoption.
    • 3 patches from the USAF 6510th Test Wing with slide rules in emblem
    • 13.09.15.04 Henschel No. 2025 c1930, missing cursor . Possibly made by Albert Nestler, Germany.
    • 13.09.15.03 Faber-Castell - Pocket slide rule with Addiator
    • 13.09.15.02 K&E 4092-5 20" slide rule, needs 1 new lens
    • 13.09.15.01 Lerebours brass sector c1800, a specimen from Ed Chamberlain's collection
    2013.09.14 - Library/MiscUSA - Added(Replaced) M285 Sterling 584 Instructions and M112 Sterling 587 Pocket Slide Rule Instructions.
    2013.09.14.02 - Sterling - Added Added 689 green stock, white slide.
    2013.09.14.01 - Sterling - Added 584 white Early Version - 2 bridges. Corrected mislabeled 585's (were 685), added links to library to some models.
    2013.09.14 - Received gift from Jeremy McCarthy (repeat donor), United Kingdom, a Platinum Tier 1 Friends of the Museum
    2013.09.13 - Received gift from Philippe DEAU of Versailles, France, now a Platinum Tier 1 Friends of the Museum
    2013.09.12.01 - New arrival - Indeco Pocket slide rule, sheet metal stock, plastic slide 2013.09.12 - ISRM_FundRaiser webpage - Changed title to Slide Rule Rescue
    2013.09.12 - Circular - Added (Replaced) Sama & Etani CTCS-552 NUPRO donated by Arthur Anderson, Boulder, Colorado. (Put generic model, no company ads, up for adoption).
    2013.09.12 - KE_Standard - Added (Replaced) 68-1100 sn318318 donated by Richard Plastino. Added to public exhibit. (Moved sn221850 to Slide Rule Rescue)
    2013.09.12 - Received gifts from James Alessio of Midlothian (suburb of Richmond), Virginia, now a Platinum Tier 1 Friends of the Museum
    2013.09.12 - MiscUSA - Added Charvos-Roos unbranded SR-109 (Wood Stock) c1950 donated by Bruce E. Van Deuson, Barnardsville, North Carolina
    2013.09.12 - Added images of the U.S.Navy Test Pilot School Insignia (5 images), screenshots from Mission Impossible (1968) and of George Gregory in 1962, a Flight Chief at Holloman Air Force Base., USAF 6510th Test Wing Patches.
    2013.09.11 - Received gifts from Dr. Paul Tarantolo (repeat donor) of Texas, Robert James of California, David Huff of North Carolina, and Lew Solomon (repeat donor) of New Zealand, all Platinum Tier 1 Friends of the Museum
    2013.09.11 - Pocket Watch - Corrected name of founder of Fowler & Co. to William H. Fowler.
    2013.09.11 - SR_WhoWho - Added info on the founder of Fowler & Co. William H. Fowler and son Harold Fowler.
    2013.09.09 - Received gifts from Steve Seale of Nashville, Tennessee, and Ian Lodge of the UK (repeat donor),now a Platinum Tier 1 Friend of the Museum
    2013.09.08 - Received gift from Lew Solomon, New Zealand, now a Platinum Tier 1 Friend of the Museum
    2013.09.05 - Received gift from David Platt of California. now a Platinum Tier 1 Friend of the Museum
    2013.09.04.01 - Received gift of an unbranded slide rule, made by Acu-Design, same as Charvoz-Roos SR-109D, from Bruce E. Van Deuson, Barnardsville, North Carolina
    2013.09.03.01 - Received gift of K&E 68-1100 Decilon sn318318 slide rule from Richard Plastino of Lakewood, Colorado
    2013.09.03 - Received gifts from Cyril Catt (repeat donor) of Australia; Keith Williamson of Irlam, UK; Carlos Arturo Llovera Rampone of Argentina; Bennie Tschoerner (repeat donor) of Texas; all Platinum Tier 1 Friends of the Museum
    2013.09.01 - Received gifts from Joseph Higgins; Michael Mjelde (repeat donor); Hans Milton (repeat donor) of Sweden; all Platinum Tier 1 Friends of the Museum
    2013.08.31 - Received gifts from William Hill (repeat donor) of Texas; and Jodie Hobson now a Platinum Tier 1 Friends of the Museum
    2013.08.30 - Received gifts from Roi Gift of Washington now a Platinum Tier 1 Friends of the Museum
    2013.08.29 - Received gifts from David Walker of Huddersfield, UK; David Guthrie of North Carolina; Rodrick MacDonald of Toronto Canada, and James Garcia of Arizona; now a Platinum Tier 1 Friends of the Museum
    2013.08.28/M283 - Received donation of K&E Doric 9068 Slide Rule Manual from Ms. Roberta Rosty of Saddle Brook, New Jersey.
    2013.08.27 - Received gift of slide rules from Art Anderson of Boulder, Colorado. Bought as a freshman at Rensselaer Polytechnic Institute in Troy, New York in 1952. RPI is the nation's oldest technological university.
    • 13.08.27.01 - K&E N4081-3 sn717411 1952 Mahogany and celluloid edges. Name on black leather case flap (Replace K&E 4081-3 S/N 907527 pre1954)
    • 13.08.27.02 - Charles Bruning 2420 all-plastic 10" slide rule in Cardboard sleeve with flap. (replace S108)
    • 13.08.27.03/M284 - Sama & Etana (Concise) model CTCS-552 Conversion Tables and Circular Slide Rule with manual. 1966. NUPRO advertising promo
    • 13.08.27.04 - Mayline drafting parallels
    • 13.08.27.05 - Rensselaer Polytechnic Institute No 32 drafting pcompass set.
    2013.08.27 - Received gifts from Dick Rose (repeat donor) of Rose Vintage Instruments of Ohio, John Oakhill of Australia, Maria Higgins, Jose Gabriel Fernandez of Spain, now all Platinum Tier 1 Friends of the Museum
    2013.08.26 - Received gifts from Louis Gotlib of Pennsylvania, now a Platinum Tier 1 Friend of the Museum
    2013-08-22 - Memorium - long-time collector friend IJzebrand Schuitema has passed away at the age of 84 in Bilthoven, the Netherlands. . Best known by collectors for co-authoring Calculating on Slide Rule and Disc. His extensive collection was donated to the Arithmeum in Bonn, Germany in 2008.
    2013.08.19 - 2013 Fund Raiser - Temporarily turned off download capability on files in Library until $2000goal is reached.
    2013.08.19 - Library/Books - Added M273 Review Of Mathematics And Slide Rule Gift Of Susan Jackson, Boulder, CO
    2013.08.19 - Library/General - Added scan of CPU-48/P B-47/B-52 Air Navigation Bombing Computer (1964) Instructions 10.4MB PDF
    2013.08.19 - Aerospace - Added scan of CPU-48/P B-47/B-52 Air Navigation Bombing Computer (1964) Instructions 10.4MB PDF, to slide rule entry. Donated by Robert Snyder, Oceanside, California.
    2013.08.19 - Circular - Added scan of CPU-48/P B-47/B-52 Air Navigation Bombing Computer (1964) Instructions 10.4MB PDF, to slide rule entry. Donated by Robert Snyder, Oceanside, California.
    2013.08.18 - EastEurope - Added Gamma-Budapest 2503 darmstadt. REF Herman van Herwijnen's Slide Rule Catalogue
    2013.08.18 - SR _WhosWho - Added photo of Franciscus (Frans) Johannes Vaes jr. Provided by Otto van Poelje
    2013.08.18 - Hemmi - Added(Replaced) No.130 (SRC 24551), 2664 Made In Occupied Japan, 50W. Gifted by Phillip Rodley, Upper Hutt, New Zealand
    2013.08.18 - SRM_Menu - Added 'Pilot Slide Rule' under brands.
    2013.08.18 - MiscJapan - Added Pilot brand catagory.. Added ALCO logo. Added accession numbers.
    2013.08.18 - Faber-Castell - Added(Replaced) 2/83, 67/54B (P029) and 1/54A with Addiator. Gifted by Phillip Rodley, Upper Hutt, New Zealand
    2013.08.18 - SR_Library/Europe - Added Faber-Castell 2/83, 62/83 Instructions. Gifted by Phillip Rodley, Upper Hutt, New Zealand
    2013.08.18 - Italy - Replaced photo 'Cal-Co Patent' Circular Slide Rule with ISRM scan. Gift of Nicolai Donchi of Italy
    2013.08.13 - MiscJapan - Added Fuji 203B gifted by Phillip Rodley, Upper Hutt, New Zealand
    2013.08.13 - K&E_Specialty - Added accession numbers and changed width of thumbnails on long slide rules. Corrected link to Clark McCoy's K&E catalogs
    2013.08.13 - Military - Added accession numbers and changed width of thumbnails on long slide rules.
    2013.08.12 - MiscJapan - Added Fuji No's 42, 51, 88, 102B, 104B, 106, 112, 251, 534S, 535S, 536C,1250S. All images reformatted from HSR Catalogue Herman van Herwijnen's Slide Rule Catalogue hosted at ISRM
    2013.08.12 - Received new acquisitions gifted by Phillip Rodley, Upper Hutt, New Zealand (scanned on 8-13-13)
    • 13.08.12.01 - Fuji 203B in plastic sleeve with Instruction sheet. In Model 129 box
    • 13.08.12.02 - Daruma Sanei Soroban 23 digit 1x4 bead abacus
    • 13.08.12.03 - Pilot No. 200-A 8" slide rule - Japanese generic
    • 13.08.12.04 - Sun Hemmi No. 130 System Darmstadt Simplex in cardboard sleeve, has manual on disk
    • 13.08.12.05 - Sun Hemmi 2664 Made In Occupied Japan
    • 13.08.12.06 - Sun Hemmi No. 50W, owned by K,S.Richmond, dc KC.N
    • 13.08.12.07 - 12" Faber Castell 1/54A with Addiator on back, (missing 1 of 2 rear lens) previous owner J.W. Hand of Christchurch, NZ.
    • 13.08.12.08 - 6" Faber Castell 67/54b Darmstadt date code 358 in worn green leather sleeve
    • 13.08.12.09/M281 - Faber-Castell 2/83 LogLogDuplex in green/tranparent clamshell case with Instruction Manual.
    2013.08.12 - SR_WhosWho - In Memoriam - ISRM and the rest of the slide rule community regrets the passing of Dieter von Jezierski, of Germany on June 17, 2013 at the age of 86. He was an employee of Faber-castell and the author of "Slide Rules - A Journey Through Three Centuries" one of the earliest reference books specifically for collectors. He has helped the ISRM quite curator often in the past. He will be sorely missed.
    2013.08.11.01 - Received 'Cal-Co Patent' Circular Slide Rule gift of Nicolai Donchi of Italy
    2013.08.01 - Italy - Added biography and photos of Francis Donchi (1917-1993), Italy, who used the Cal-Co Patent Circular Slide Rule, being sent to ISRM by Nicolai Donchi of Italy
    2013.08.07 - SR_Library/MiscUSA - Added M132 Richardson Direct Reading SR Manual 1909
    2013.08.07 - Richardson - Added accession numbers to two slide rules. Added thumbnails and links to 1909 manuals.
    2013.08.05 - Added biography and portrait of David Hecht, Alexandria, Virginia, to specimens in several galleries. Numerous slide rules were donated from David's collection when he was downsozing.
    2013.08.05 - Added biographies and portraits of John Prince III and Martha H. Prince to specimens in several galleries. Slide rules were donated by wife, Martha of Tucson Arizona.
    2013.08.03 - Added biography of Raymond Anthony Heit (1957-2003) to specimens in three galleries. His collection was donated by wife, Carlee Heit of Houston Texas.
    2013.08.03 - K&E Standard - Added(replaced) 4093-3 LogLogVector sn549118, 4088-3 Polyphase sn357810 AllGlassCursor 1922-1935 (S488), 4088-3 Polyphase sn406555 (S009). gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.02 - Faber - Added Instructions thumbnails to 67/39 and 67/87
    2013.08.02 - SR_Library/Europe - Added M274 Faber-Castell Instructions for the use of Castell precision pocket slide rules. Gift of Susan Jackson, Boulder, Colorado
    2013.08.01 - SR_Library/Europe - Added M280 Aristo Multilog 0970 Slide Rule gift of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - Aristo - Added Nr.0970 MultiLog dc2FX17(1969) Charvoz model, in box, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - SR_Library/Pickett - Added M277 How to use the Ortho-phase Slide Rule gift of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - Pickett - Added(replaced) N500-ES w/square braces(S221), N525-ES (Dereck Ross), No. 1000 magnesium Orthophase in box, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - MiscUSA - Added Agitair (C-Thru) No. 27 Instructions, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - SR_Library/MiscUSA - Added C-Thru No. 27 Instructions, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - SR_Library/Dietzgen - Added M279 1776 Redirule Duplex Instructions, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - Dietzgen - Added(Replaced)1776 5" Redirule (P023), 1746 Maniphase Multiplex sn703397 (S302) gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.08.01 - Circular - Added Cal-Co Patent Circular Slide Rule, Image Contributed By Nicolai Donchi of Italy
    2013.08.01 - Italy - Added Cal-Co Patent Circular Slide Rule, Image Contributed By Nicolai Donchi of Italy
    2013.07.31 - Ephemera - Added two images, on ad a nd one political cartoon from a New Zealand newspaper, contributed by Phillip Rodley, Upper Hutt, NZ.
    2013.07.30 - Aristo - Assigned missing ISRM accession numbers to donated and acquired items.
    2013.07.30 - MiscUSA - Added(replaced) Charvoz-Roos SR-105D, W.J.Boos patent (S563), Charles Bruning 2401, gifts of Daniel Swerdlow, Bethesda, Maryland
    2013.07.30 - Acumath - Added A-51 and Pocket duplex Based on W.J. Boos patent gift of Daniel Swerdlow of Bethesda, Maryland
    2013.07.30 - Acumath - Added(Replaced) 1311 LogLogDeciTrig (S375), 1500 U.S. Govt. LogLogDeciTrig (S388), all gifts of Daniel Swerdlow of Bethesda, Maryland
    2013.07.29 - Calculators - Added retail box image and manual for APF Mark23 Handheld Slide Rule Calculator.
    2013.07.29 - MiscJapan - Added Santok Pocket mannheim, Elastic Stop Nut Corp of America Promo, gift of Daniel Swerdlow, Bethesda, Maryland
    2013.07.29 - Pickett - Added magnesium Model 500 sn09C3296, gift of slide rules from Maureen White of Minneapolis, MN, with picture and bio of her uncle Phillip C. Murray (1920-2008)
    2013.07.29 - SR_Library/USA - Added Acu-Math 44P (M278) - gift of slide rules from Maureen White of Minneapolis, MN used by her uncle Phillip C. Murray (1920-2008)
    2013.07.29 - Acumath - Added(Replaced) 1211 pocket duplex, gift of slide rules from Maureen White of Minneapolis, MN, with picture and bio of her uncle Phillip C. Murray (1920-2008)
    2013.07.25 - Received gift of slide rules from Maureen White of Minneapolis, MN used by her uncle Phillip C. Murray (1920-2008)
    • 13.07.25.01/M278 - Magnesium Acumath 1211
    • 13.07.25.02 - Magnesium Pickett Model 500 Ortho-Phase
    • 13.07.25.03 - K&E Triangle Drafting scale (wood)
    2013.07.17 - In Memoriam - ISRM regrets the passing of Dieter von Jezierski, of Germany (1927-2013) at the age of 86. He was an employee of Faber-castell and the author of "Slide Rules - A journey Through Three Centuries" one of the ealiest books specifically for collectors. He has helped the ISRM quite curator often in the past. He will be sorely missed.
    2013.07.06 - Friends - Added Richard Burns for gift.
    2013.07.06 - Graphoplex - Added No. 691a Neperlog - Hyperbolic duplex, image from Rod Lovette Collection
    2013.07.06.01 - Ephemera - New acquisition of pair of gold Slide Rule Cuff Links.
    2013.07.05/M277 - Received gift of C.N. Pickworth's The Slide Rule 17th printing, 1920, from Phillip Rodley, New Zealand
    2013.07.05 - SR_WhosWho - Inducted Daniel Swerdlow of Bethesda, Maryland. A collector and contributor of slide rules to ISRM
    2013.07.05 - Japan - Added(Replaced) Uchida Yoko Generic Mannheim Slide Rule. Gift Of Norma Tanner. Santok OEM Pocket slide rule , Seaforth brand, gift of Phillip Rodley, NZ
    2013.07.05 - Australia - Corrected Html codes for degrees and renamed files for W&G 443
    2013.07.05 - Nestler - Added c1900 slide rule with Slide Rule Data Slips, Compiled by C.N. Pickworth, Wh. Sc. Donated by Phil Rodley, NZ
    2013.07.05 - PIC/Thornton - Added P.I.C. 121 and 131 Electro, gifts from Phillip Rodley, of UpperHutt, New Zealand.
    2013.07.05 - France - Added(replaced) Marc Electricien No 5 pocket slide rule, with manual (HSRC). Donated by Phil Rodley, NZ
    2013.07.05 - Aerospace - Added Pilot Balloon (pibals) Slide Rule - Mark 5. Sent from New Zealand by Phillip Rodley. Included Antarctica images of Pilot balloons
    2013.07.04 - Faber - Added 67/87 Rietz belonging to Jim Rodgers, donated by daughter Susan Jackson. Added accession numbers to donations given by David Hecht in 2009
    2013.07.04 - Aerospace - Added CPU-48/P B-47/B-52 Air Navigation Bombing Computer (1964), donated by Robert Snyder, Oceanside, California.
    2013.07.04 - Circular - Added CPU-48/P B-47/B-52 Air Navigation Bombing Computer (1964) and Concise 271
    2013.07.04 - K&E - Added(replaced) 4088-3 with all-glass cursor (S451), N4041-3 sn637284, 4053-3 c1956 (S385)
    2013.07.04 - Dietzgen - Added(replaced) 1767 National belonging to Jim Rodgers, donated by Susan jackson
    2013.07.04 - Acu-Math - Added(replaced) 90A (S469), 400B Wide Stock, 400B Narrow Stock,
    2013.07.03. - Received gift of slide rules and books from Daniel Swerdlow , Bethesda, Maryland for the support of the galleries and fund raising efforts.
      Slide Rules
    • 13.07.03.01 - Acu-Math No. 1311 Log Log Decimal Trig Duplex, Plastic laminated magnesium, leather sleeve, (replace S375)
    • 13.07.03.02 - Acu-Math No.1500 Log Log Decimal Trig Duplex (Marked U.S.) Plastic stock. to Fundraiser.
    • 13.07.03.03 - Charvos-Roos SR-105D (Acu-Design, based on Boos patent). Plastic Laminated wood stock, Missing rear hairline. (restore & replace S563)
    • 13.07.03.04 - Acu-Math No. A-51 (Acu-design, Based on Boos Patent). Plastic laminated magnesium stock, finger holes. (New to Gallery)
    • 13.07.03.05 - Pocket version of Boos patent, Made in USA, same as Charvoz-Roos PSR-101D Duplex 1949-1952, but missing brand name (Acu-Math?) (new to Charvos Roos)
    • 13.07.03.06 - Charles Bruning Co. 2401 Pocket Slide Rule, Made in USA. Early cursor, Marked Morris H. Freidman (new to gallery)
    • 13.07.03.07/M275 - Santok (Japan) Pocket Slide Rule, with Promo Ads., Instructions (new to gallery)
    • 13.07.03.08/M276 - C-Thru Pocket Slide Rule No.27 With Instructions Rebranded as Agitair
    • 13.07.03.09 - Aristo Nr.89 Rietz Pocket Slide Rule, dc 3FX10 (1969), in leather sleeve, Instructions (duplicat for fund raiser)
    • 13.07.03.10 - Pickett N600-ES (aluminum) Pocket Slide Rule, Modern Logo, 'hooked' braces, leather sleeve (replace ISRM 12.06.24.12)
    • 13.07.03.11 - Pickett 160-T Plastic Pocket Slide Rule, Made in Mexico, in retail box, fiber sleeve (duplicate for fund raiser)
    • 13.07.03.12/M279 - Dietzgen 1776 Redirule Duplex, in retail box w/ manual & leather sleeve. Promo marked KOPPERS. (replace P023)
    • 13.07.03.13 - K&E 4088-3 Duplex, sn407724, Improved cursor (intact). Model number of right end of slide. (replace S009).
    • 13.07.03.14 - Pickett CREI Model N531-ES, round black logo,slight oxidation on braces. (Duplicate to fund raiser)
    • 13.07.03.15 - Pickett Model N-500-ES HI Log Log, Curved finger braces, round black logo, ©1962, in plastic film sleeve, (duplicate for fund raiser)
    • 13.07.03.16 - Pickett Model N-525-ES Statrule ©1965, in black leather sleeve w/belt loop. round black logo. (replace REF archive)
    • 13.07.03.17 - Pickett Model N-500-ES Log Log, square braces, in brown leather sleeve w/belt loop. round black logo. (replace S221)
    • 13.07.03.18 - Pickett (P&E) 1000 Ortho-phase Duplex, snA048532, magnesium, metal cursor, P&E triangle logo, ©1948, black dot CI scale labels, in box w/cloth sleeve, Model 1000 manual (SR & Manual) new to gallery)
    • 13.07.03.19 - Dietzgen CatNo.1746 Maniphase Multiplex, sn703397, old scale set/new cursor design/Mahogany edge, in black leather sleeve, w/conversion table insert (new to gallery)
    • 13.07.03.20 - Post, Frederick, No1447, Sun Hemmi dc HK, Post logo upper right on stock (sligth differences - new to gallery)
    • 13.07.03.21 - Post, Frederick, No1447, Sun Hemmi dc FJ, no Post logo, red cardboard sleeve. (duplicate for fund raiser)
    • 13.07.03.22/M280 - Charvos Roos/Aristo 970 Multilog duplex in box, dc2FX17(1969), leather sleeve, manual ©1954, warranty #140575 (replace S065)
    • 13.07.03.23 - Diwa Commercial No.301 (early), RR track scales, screw reinforced laminates, in cardboard sleeve. (New to gallery)
    • 13.07.03.24 - British Thornton AD150 Advanced, in plastic hardcase sleeve (replace S092)
    • 13.07.03.25 - K&E 68-1892 K12 Prep, in clear mylar sleeve. (duplicate for fund raiser)
    • 13.07.03.26 - K&E 4093-3 Vector Duplex, sn545118 Improved cursor (intact), leather sleeve missing flap. with equivalents insert (Add to Gallery)
    • 13.07.03.27 - K&E N4080-3 Improved cursor (severe KERCS), cardboard sleeve,
    • 13.07.03.28 - K&E 4088-3 All glass cursor (one side chipped), sn 357810, leather sleeve - stamped Lawrence Haner.(replace S488)
    • 13.07.03.29 - K&E N9081-3 Doric, sn30422, all plastic stock, in leather sleeve w/ belt loop. Beginnings of KERCS (duplicate for fund raiser)
    • 13.07.03.30 - K&E 4081-3 Log Log Duplex Decitrig, sn566712, Improved cursor (beginning KERCS cracks), black sleeve in box.
    • 13.07.03.31 - K&E 4093-3 Vector, sn322624, Improved cursor (severe KERCS), round K&E logo
    • (4x) empty sleeves
      Books and Manuals
    • L.W. Rosenthal - Dietzgen, Mannheim Slide Rules, 1905/1908, 64pp.
    • E. Justin Hills, US Armed Forces EM906 - A course in the Slide Rule and Logarithms 1938/1943, 106pp.
    • J.J. Clark - The Slide Rule, (hardbound) 1909, 63 pp. (new to library)
    • Paul E, Machovina - A Manual for the Slide Rule, 1950 McGraw-Hill,78pp.
    • Pickett Pocket Catalog 608 - Slide Rules, Scientific & and Educational Equipment
    • Allen R. Cullimore - Euegene Dietzgen Co., The mannheim Slide Rule,1925, 80pp.
    • Charles O. Harris, US Armed Forces MB858 - Slide Rule Simplified, USAFI course (with letter), Reprinted 1943
    • Sommers, Drell,Wallschaeger - The Slide Rule and How to Use it, hardbound workbook with Lawrence 10B slide rule (with Magnifyer), 208pp.
    • Post (E.I.FiesenHeiser) Versalog Slide Rule Instructions, Hardbound, 1963 edition, 120pp.
    • Pickett (Maurice L. Hartung) - How to Use Log Log Slide Rules, 1953, 96pp.
    • M277 Pickett (Maurice L. Hartung) - How to Use Ortho-Phase Duplex Slide Rules, Model No. 1000, 1948, 32pp (new to gallery)
    • K&E (Kells, Kern, Bland) Slide Rule manual - Log Log Duplex Trig No. N4080, 1943/1948, 124pp.
    • K&E Supplement - The DI Scale, No. 4080, 1953, 8 pp.
    • K&E (Kells, Kern, Bland) - Polyphase Duplex DeciTrig Slide Rule Manual, No. 4071, 1939, 88pp.
    • K&E (Willian E. Breckenridge) - Polyphase Slide Rule Manual, No. N4053, 1938, 88pp
    • K&E (Willian E. Breckenridge) - Polyphase Slide Rule Manual, No. N4053, 1938/1944, 88pp (with ads in back)
    • K&E (Willian E. Breckenridge) - Polyphase Slide Rule Manual, No. N4053, 1938/1944, 88pp (used by donor Dan Swerdlow)
    • K&E (Willian E. Breckenridge) - The Mannheim Slide Rule , No. 4041, 1927, 76pp
    • K&E (Willian E. Breckenridge) - The Mannheim Slide Rule , No. N4041, 1938, 78pp
    • M276 Aristo Multilog 0970 (Charvos-Roos) - ©1954, 28pp
    2013.07.02.01 - Received aquisition of APF Mark23 Slide Rule Calculator in Box
    2013.06.28 - Received gift of slide rules from Susan Jackson of Boulder, Colorado, belonging to her father Jim Rodgers (1928-2012), to be used in support of ISRM. Husband Ken Jackson donates his K&E Decilon.
    • 13.06.28.01 - Concise 271 Circular with Instruction booklet, (add to gallery)
    • 13.06.28.02 - Dietzgen 1767 National. Missing cursor replaced with one from an early Acumath 400 (add to gallery)
    • 13.06.28.03 - Faber Castell 67/87 Rietz pocket slide rule, with instructions
    • 13.06.28.04 - K&E 68-1100 Decilon 10 in Leather case. Owned by Ken Jackson as a student, switched major to accounting and finance. was sitting in a box ever since.
    • M273 - Review of Mathematics And Slide Rule, Nuclear Warfare School, Atlantic Nuclear Weapons Training Center (add to library)
    • M274 - Faber-castell Instructions for 67/39, 67/91, 67/87, 67/87R, 67/98b, 67/98R (add to library)
    2013.06.28 - Faber - Corrected scale set on 2/82 dc1157 ISRM 11.10.26.01
    2013.06.27 - Added Lawrence 10-C Engraver's And Photographer's Proportional Calculator, belonged to Charles Meyerson, donated by daughter Judy Gorin
    2013.06.26.01/M282 - Received donation of B-47/B-52 Air Navigation/Bombing slide rule from Robert Snyder, Oceanside, CA. Belonged to his father Earl L. Snyder.
    2013.06.25 - Received donation of 31 slide rules from Norma Tanner, 545 Sedgewick, Libertyville, IL 60048, that she provided to students, over her teaching career Most will be destined for the ISRM Slide Rule Loaner Program
    • 13.06.25.01 Acu-math 511 Mannheim Professional (replaces S224)
    • 13.06.25.02 Acu-math 90A Mannheim Trig, Magnesium (c1945) (replaces S469)
    • 13.06.25.03 Pickett N902-ES Aluminum Radius Braces Modern Logo (duplicate)
    • 13.06.25.04 Acu-math 400 Mannheim Trig, Plastic narrow stock, Rounded Braces, oval logo (c1968) Replaces current ISRM artifact.
    • 13.06.25.05 Acu-math 400 Mannheim Trig, Plastic wide stock, Rounded Braces, oval logo (c1968) Replaces current ISRM artifact.
    • 13.06.25.06 K&E 4088-3 All-glass cursor (1913-1921)Lot#38 (replace S451)
    • 13.06.25.07 K&E 4053-3 Plastic Back Stock, Mahogony upper stock and slide (c1956) (replace S385) needs cursor spring restored
    • 13.06.25.08 K&E N4041 sn637284 Mahogony (c1956) (replace s/n 715559)
    • 13.06.25.09 Uchida Yoko Co.Japan, Generic Mannheim Slide Rule,c1970.(replace S104) (like the Pickett 120 and Acu-Math 400)
    • 13.06.25.10 Sterling 589 w/Green Slide Manheim (replace S151)
    • 13.06.25.11 K&E 4058W Beginners Slide Rule, Painted wood, Bright Steel Cursor (marked Ray Fine-AET)
    • 13.06.25.12 K&E 4058 Beginners Slide Rule, bare wood, Missing Cursor. Possible resoration.
    • (3x)Acu-math 400 - to be used in Slide Rule Loaner program
    • 13.06.25.13 Acu-math 400B - Wide Stock, Square braces, Oval Logo, Equivalents on back.
    • 13.06.25.14 Acu-math 400B - Narrow Stock Oval Logo Wrap Over Cursor, Equivalents on back.
    • (10x)Pickett 120 (early) - to be used in Slide Rule Loaner program
    • (1x)Pickett 120 Trainer, Black braces - to be used in Slide Rule Loaner program
    • (2x)Sterling 584 white - to be used in Slide Rule Loaner program
    • (2x)Pickett 120 Instructions
    2013.06.25 - Received another donation of 8 slide rules from Phillip Rodley, Upper Hutt, New Zealand
    • 13.06.20.01 - Pilot Balloon Slide Rule - Mark 5, 20 inch with 4 cursors, in Wood box
    • 13.06.20.02 - PIC/ Thornton 121 Electro Slide Rule
    • 13.06.20.03 - PIC/ Thornton 131 Electro Slide Rule, Has cracked glass lens
    • 13.06.20.04 - Pickworth (Faber or Nestler)
    • 13.06.20.05/M269 - Santok (Japan), Seaforth Promo pocket slide rule with manual
    • 13.06.20.06/M270 - Marc Electricien No 5 pocket slide rule, with manual (slightly warped).
    • 13.06.20.07 - Acumath No. 400 - Plastic Wide Stock, wrap over cursor, Oval Logo
    • M271/M272 - Faber Castell 157/87 Rietz dc971 (no cursor, duplicate) with F-C Slide Rule Primer manual and Instructions
    2013.06.10.01 - Received donation of Lawrence 10-C Engraver's And Photographer's Proportional Calculator Slide rule from Judy Gorin, St. Louis, Missouri. Belonged to father, Charles Meyerson.
    2013.06.10 - Library/USA - Received donation of Lawrence Slide rule Instruction Book (replaced M89)
    2013.06.05 - Soviet - Added flags for Georgia, Estonia, Lithuania and Latvia.
    2013.06.04 - Patents/US - Added US2,701,687 Wilfred J. Boos Patent
    2013.05.30 - Calculator - Added Litronix 1603 solid state slide rule calculator, sn 216455, acquired through contributions.
    2013.05.29 - Circular - Added Dempster RotaRule Model AA sn2189, sold as Dietzgen 1798
    2013.05.29 - SR_WhosWho - Inducted Assoc. Prof. Allan Bromley (1947-2002) of Australia. Much of his collection is in the Powerhouse Museum in Sydney, Australia. Some images used on ISRM.
    2013.05.28 - Received new acquisition of Dietgen model of The Depmster Rotarule, contributed in part by Dick Rose, of Rose Vintage Instruments
    2013.05.28 - Ephemera - Added photos of Joe Soper's K&E exhibit and of the Mural at La Guardia Airport.
    2013.05.23 - Post/Hemmi/Ricoh/Circular/K&E galleries - added ascesion numbers to donated slide rules
    2013.05.21 - MiscUSA - Added sub-catagory and Bill-Mar Sp. Co. Concrete Calculator No.24 gift of Jeremiah Whitney, Louisville, Colorado
    2013.05.21 - Ricoh - Added(Replaced Compass 1315 (S506) gift of Jeremiah Whitney, Louisville, Colorado
    2013.05.19 - Received gift of two slide rules from Jeremiah Whitney, Louisville, Colorado
    • 13.05.19.01 - Bill-Mar Sp. Co. Concrete Calculator No.24
    • 13.05.19.02 - Ricoh Compass 1315 dc P.S-3
    2013.05.13 - USSR/Soviet - Added OAO Kalibr-Moscow Circular Slide Rule Calculator Photo By Dushan Grujich Collection, Australia
    2013.05.13 - Circular - Added OAO Kalibr-Moscow Circular Slide Rule Calculator Photo By Dushan Grujich Collection, Australia
    2013.05.13 - KE - Added (Replaced) 4035 Lot453 1915 Finely Divided, and 4080-3 sn352343, 1939-1949 scale set , 4th variation, has Exponent range labels marked with lunate Epsilon symbol (ϵ) on Log Log scales.
    2013.05.13 - SR_WhosWho - Inducted Prof. Erhard_Anthes of Germany, Franciscus Johannes Vaes (1867-1943) of The Netherlands, Albert Rohrber (1887-1966) of Germany
    2013.05.09 - KE - Added (Replaced) 4088-5 snNone, 4083-3 sn475632 1961, 4092 1916-1921 (S426), 4091-3 1933, deleted (S252) 4083-3, (S038) 4092-3
    2013.05.08 - Nestler - Added 1905 Model No20 Mannheim and 1937 Model No21 Darmstadt
    2013.05.08 - Thornton - Added PIC Pocket Slide Rule, Railroad Track style scales, Gift of Phillip Rodley of UpperHut, NZ
    2013.05.08 - Blundell - Added Westec Electronics Slide Rule, Gift of Phillip Rodley of UpperHut, NZ
    2013.05.08 - British(United Kingdom) - Added Westechno catagory and Westec Electronics Slide Rule (made by BRL/Blundell), Gift of Phillip Rodley of UpperHut, NZ
    2013.05.08 - Hemmi - Added early Hemmi 1 (French Export), and Hemmi 80K Electro with two cursors, Gift of Phillip Rodley of UpperHut, NZ
    2013.05.08 - Ephemera - Added picture of Hall Hibbard & Clarence "Kelly" Leanord Johnson holding a K&E slide rule. Found by Ingo Elsen in Germany.
    2013.05.07 - Rarities - Added George Bousfield's "Vade Mecum Slide Rule" Gifted to ISRM by Phillip Rodley of Upperhut, New Zealand
    2013.05.07 - Dietzgen - Added 1746 sm702167 Early Cursor, Gift of Barnara Emmett, Owned by her father William Page Morris
    2013.05.06 - SR_Terms/Encyclopedia - Added Koh-I-Noor Hardtmuth and Koh-I-Noor Slide Rules Fabrik Pvt. Ltd
    2013.05.05 - Graphoplex - Made minor edits to existing gallery to correct HTML ASCII codes
    2013.05.05.02 - New slide rule acquisition K&E 4083-3 sn475632 1961
    2013.05.05.03 - New Calculator acquisition - 1982 TI-55-II with 'slide rule' on the box.
    2013.05.05.01 - New slide rules acquisition K&E 8" Polyphase 4035 Finely Divided. all glass cursor.
    2013.05.04.01 - Received donation of Dietzgen 1746 sn702167 from Barbara Emmett, owned by father W.P Morris. Bio and picture included. Has Deteriorated cursor.
    2013.04.26 - Received gift of slide rules purchased by Phillip Rodley in New Zealand
    • 13.04.26.01 - The "Vade Mecum Slide rule" Designed for the timber trade by George Bousfield, Grimsby, Patent 12806
    • 13.04.26.01.M257 - The "Vade Mecum Slide rule" manual
    • 13.04.26.02 - Westec Electronics Slide Rule by Westechno Ltd, Devon England
    • 13.04.26.02.M258 - Westec Electronics Slide Rule manual
    • 13.04.26.02.M259 - Four-Figure Tables by C.Godfrey and A.W.Siddons
    • 13.04.26.03 - PIC A.G.Thortnon pocket slide rule, railroad track divisions, green cardboard sleeve
    • 13.04.26.04 - Hemmi 80K dcFL Electro Slide Rule with two cursors
    • 13.04.26.05 - Hemmi 1 Slide Rulemissing lens in cursors
    • 13.04.26.06 - Rabone No1190 four fold Joint rule
    2013.04.23.01 - New acquisition of K&E 4091-3 sn460643 Orig. Owner W.H.Dewitt
    2013.04.20.01 - Donations - Received "The Elemental Slyd Rul" slide chart from Dr. Daniel Thomas, South Hadley, MA. Belonged to father Dr. Paul Thomas.
    2013.04.13 - SR_Library/Europe - Added M256 Aristo 40128/IWA 09102 Manual
    2013.04.13.01 - Calculators - Added 1973 Melcor Answermath SR8 Slide Rule Calculator
    2013.04.12.01 - New acquisition of K&E 4092-3 noSN All-Glass Cursor PERFECT. to replace
    2013.04.12.02 - New acquisition of Nestler No20 Rietz, Railroad track scales, from Bulgaria
    2013.04.11.01 - Acquired Vernon Gold Slide Rule Tie Clasp
    2013.04.11 - Calculators - Added Litronix 1602 Solid State Slide Rule
    2013.04.11 - Adders - Placed additional information about Lightning Calculators and Addometers.
    2013.04.10 - Pickett - Added N4-T and Model 3 Multiphase Log Log donated by Jeff Smith, Fort Atkinson, Wisconson
    2013.04.10 - Donations - Received 2 slide rules from Jeff Smith, Fort Atkinson, Wisconson
    • 13.04.10.01 - Pickett N4-T Vector Log Log, belonging to Jeff Smith, LtCol, USAF, Ret.
    • 13.04.10.02 - Pickett Model 3 Multiphase Log Log, snHC037844, belonging to Jeff Smith's father, Robert J. Smith (1923-1997)
    2013.04.10 - SR_Library/Books - Added the Oughtred Society Publication "All About Slide Rules"
    2013.04.09 - SR WhosWho - Added Phillip Rodley of New Zealand. Collector, Donor and contributor to ISRM.
    2013.04.04.01 - New acquisition of Nestler No21 Darmstadt, Railroad track scales, from Arizona
    2013.04.03.01 - Aristo - Added Aristo 40128 Universal Pocket Slide Rule (Wire) - ©1965 Dennert & Pape. aka: Universal Rechenschieber (Draht), Règle À Calculer Universal (Fil), Regla De Universal (Alambre)
    2013.04.03.02 - Adders - New acquisition of an ADD-A-mite Pocket Calculator with box and Instructions
    2013.04.02 - SR_Library/USA - Added (Replaced) M254 Sterling Metric Converter Instructions (M20) donated by Albert Klumpp, Arlington Hts, IL
    2013.04.01 - Received donation from Albert Klumpp, Arlington Hts, IL now a Friend of the Museum
    2013.04.01 - Received donation from David White now a Friend of the Museum
    2013.04.01 - Received donation of two slide rules used and gifted by Albert Klumpp , Arlington Hts, IL
    • 13.04.01.01 - Sterling Metric Converter (yellow slide, white stock) with Manual
    • 13.04.01.02 - Concise Slide Rule and Reference Tables by Sama & Etani with manual
    2013.04.01 - KE_Standard - Added N9081-3 photo belonging to Mercury/Gemini Astronaut Gordon Cooper
    2013.03.30.01 - Calculators - Added Litronix 1602 slide rule calculator sn46836, acquired through contributions. 2013.03.30 - Rarities - Added Palmer's Computing Scale, 11 inch square. Image from 2009 Phillip Wiess Auctionn
    2013.03.30 - British/Stanley - Added Cooper 100 inch slide rule photos, from 2009 Phillip Wiess Auction
    2013.03.30 - SR WhosWho - Added William Ford Stanley. Inventor of a dividing Engine and maker of scales, including for Fowler Cylindrical SR
    2013.03.29 - Aristo - Added Early D&P ALTONA with split window cursor (Mannhiem), photo contributed by JAcek Szukowski Collection, Poland.
    2013.03.29 - Nestler - Added Early Pocket Mannhiem, photo contributed by JAcek Szukowski Collection, Poland.
    2013.03.29 - Manuals - Added Controller 75R 110R 200R instructions, National Rechenwalzen Instructions
    2013.03.28 - Circular - Added Controller 75R and 110R Calculator Circular Slide Rules each with manuals
    2013.03.28 - Germany - Added Controller 75R and 110R Calculator Circular Slide Rules each with manuals
    2013.03.27.01 - Acquired Harrow Mark Reducer, Aston & Mander Makers, Soho, England from Chris Miles, Bournemouth, England, UK
    2013.03.25 - EastEuro - Added SKALA slide rule images from Giovanni Breda Collection
    2013.03.25 - Germany - Added E.O. Richter section, 4 images from Hermann's Catalog and Giovanni Breda Collection
    2013.03.24 - EastEuro - Added Logar section and Logar. Darmstatd slide rule, image provided by Giovanni Breda, Italy.
    2013.03.22 - EastEuro - Added SKALA cooperative background information.
    2013.03.20 - EastEuro - Added photos of Polish slide rules contributed by JAcek Szukowski Collection, Poland.
    2013.03.17 - Switzerland - Added National Rechenwalze Modell 20 System Billeter,owned by John William Radu , and partially donated by his grandson Robert A/ Ecker. Included bio's and family photos
    2012.03.16 - Associates - Created new folder for JAcek Szukowski
    2013.03.15 - New Acquisitions - National Rechenwalze Modell 20 System Billeter, Controller 75R and 110R Calculator Circular Slide Rules each with manuals
    • 13.03.15.01 - National Rechenwalze Modell 20 System Billeter,owned by John William Radu
    • 13.03.15.02 - Controller 75R Circular Slide Rule
    • 13.03.15.03 - Controller 75R Circular Slide Rule
    • M253 Controller 75R and 110R Circular Slide Rule Instructions
    • M254 National Rechenwalze Modell 20 System Billeter Instructions
    2013.03.15 - Circular - Added four Controller Calculator Circular Slide Rules
    2013.03.15 - Germany - Added four Controller Calculator Circular Slide Rules
    2013.03.14 - SR_Library_Europe - Added Nestler Slide Rule Brief Instructions, 4 pages
    2013.03.14 - PocketWatch - Added (Replaced) Fowler's Universal Calculator (Replaced Rod Lovett Collection). Obtained through Scott Reynold's Vintage Calculators
    2013.03.14 - Circular - Added Miller Dial Circular Slide Rule, Amphenol Circular Slide Rule & RF Smith Chart. The Amphenol donated bt Philip Rodley of New Zealand.
    2013.03.14 - SR_WhosWho - Added Albert John Anido (1883-1949) inventor of 'The Anido Slide Rule'.
    2013.03.14 - British - Added 'The Anido Slide Rule', designed by Albert John Anido (1883-1949)
    2013.03.14 - Pickett - Added N904-ES Trig and Decimal Keeper Speed Rule. Acquired at OS winter meeting
    2013.03.13 - EastEuro - Added UGK, Terta, Tehnolemn. Moved from USSR/Soviet gallery. on suggestion by Jacek Szukowski, Poland.
    2013.03.13 - Soviet - Deleted UGK, Terta, Tehnolemn and moved to East Europe gallery. on suggestion by Jacek Szukowski, Poland.
    2013.03.11 - SRM_Home - Added News and contestant photo of Irvine, TX World (Texas) Slide Rule Champioships (at bottom of page).
    2013.03.11 - SRM_Menu - Repaired misdirected links for Gamma, Skala, Logarex and Curta, in manufacture's brands section
    2013.03.08 - SR_Library/Books - Added reference and purchasing information to Our Worlwide Knowledge of Calculating Machines by Dr. Detlef Zerfowski
    2013.03.08 - SR_WhosWho - Added Dr. Detlef Zerfowski, author of the book Our Worlwide Knowledge of Calculating Machines
    2013.03.01 - Rarities - Added reference and link to the Oughtred Society Rarities Gallery
    2013.02.26 - Rarities - Added Edward Roberts, Makers, Dove CourtOld Jewry, LONDON, 4-sided Boxwood Rule
    2013.02.26 - Lawrence - Added 8-B, donated by Henry Eck, Catonville, Maryland, belonging to a Mary Elizabeth Exley
    2013.02.26 - Italy - Added Marcantoni 25RE Electro-Rietz (Ebay acquisition to represent Italy in exhibits.
    2013.02.26 - Japan - Added Fuji No201P, Hope 52-G, and Royal 1091, all donated by Phillip Rodley, New Zealand.
    2013.02.25 - France - Added Maurice Damien Universal slide rule, donated by Phillip Rodley, New Zealand. Also 3 reference Maurice Damien slide rules from photocalcul.com in France
    2013.02.24 - Ephemera - Added picture of students at Gulf H.S. New Port Richey, Florida, Manhattan Project Physicist Enrico and Laura Fermi, and a Lionel-Porter Mastercraft Mathematics set from Carl Schwent Collection
    2013.02.23 K&E_Standard - Added(Replaced) 68-1130 (P045) Pocket Decilon in Retail Box, 4095-5 Merchant Rule c1922 all glass frameless cursor. and 4053-5 lot 79 all glass frameless cursor.
    2013.02.23 Pickett - Added(Replaced) N600-ES NOS, N600-T red inverse scales Blk Logo, N904-ES, Corrected scale identifyers on N600-T/ES, N3P-ES(P072), N3P-T(P073), N4-T/N600-T Twin Pack (S130)
    2013.02.21.01 - Donations - Received Lawrence 8" slide rule donated by Henry Eck, Catonsville, Maryland
    2013.02.20 - New Acquisitions - Donations and purchases from Oughtred Society Meeting in since last update.
    • 13.02.20.01 - Marcantoni 25RE
    • 13.02.20.02 - The Anida Slide Rule - acquired on loan from Rose's Vintage Instruments.
    • 13.02.20.03 - Pickett N904-ES TrigExponential with Decimal Keeper
    • 13.02.20.04 - Pickett N4-T/N600-T DualBase LogLog TwinPack
    • 13.02.20.05 - K&E_68-1130 Pocket Decilon in BoS NOS, N600-T red inverse scales Blk Logo, N904-ES, Corrected scale identifyers on N600-T/ES, N3P-ES(P072), N3P-T(P073), N4-T/N600-T Twin Pack (S130)
      2013.02.21.01 - Donations - Received Lawrence 8" slide rule donated by Henry Eck, Catonsville, Maryland
      2013.02.20 - New Acquisitions - Donations and purchases from Oughtred Society Meeting in since last update.
      • 13.02.20.01 - Marcantoni 25RE
      • 13.02.20.02 - The Anida Slide Rule - acquired on loan from Rose's Vintage Instruments.
      • 13.02.20.03 - Pickett N904-ES TrigExponential with Decimal Keeper
      • 13.02.20.04 - Pickett N4-T/N600-T DualBase LogLog TwinPack
      • 13.02.20.05 - K&E_68-1130 Pocket Decilon in Box
      • 13.02.20.06 - Pickett N3P-ES NOS in Box
      • 13.02.20.07 - Pickett N3P-T NOS in Box
      • 13.02.20.08 - K&E 4095-5 Merchant Rule 1922 sn55071, no cursor (used cursor from 4088-5), Donated by Martha Prince
      • 13.02.20.09 - K&E 4053-5 Polyphase Rule AllGlassFramelessCursor 1915-1922 snNone
      • 13.02.20.10 - Pickett N803-T/N600-T DualRule LogLog TwinPack
      • 13.02.20.11 - Edward Roberts, Makers, Dove CourtOld Jewry, LONDON, 4-sided Boxwood Rule
      • 13.02.20.12 - K&E 4088-5 AllGlassFramelessCursor 1922 lot66, no cursor(added cursor from 4092-3), Donated by Martha Prince
      • 13.02.20.13 - Pickett N600-T Red Inverse Scales
      2013.02.16 - SR_WhosWho - Added Martha Prince and Carl Schwent while at Oughtred Society Winter Meeting in Tucson, Arizona.
      2013.02.13 - Donations - Received Donation of slide rules from Phillip Rodley of Upper Hutt, New Zealand.
      • 13.02.13.01 - Maurice Daimen Universal SlideRule
      • 13.02.13.02 - Hope 52-G SlideRule
      • 13.02.13.03 - Royal 1091 LogLog
      • 13.02.13.04 - Fuji Quate Log No201P,
      • 13.02.13.05 - Amphenol Circular Slide Rule & RF Smith Chart.
      2013.02.09-13 - Display - building displays for a least 4 tables to be seen at the Pima Air Museum on Feb 16.
      2013.02.03.03 - Calculators - Added Prinztronic SR88M, acquired through contributions. 2013.02.03.02 - Calculators - Added Litronix 2140 snA13961, acquired through contributions. 2013.02.03.01 - Calculators - Added Unisonic 738, acquired through contributions. 2013.02.02.01 - Calculators - Added Commodore SR9190R, acquired through contributions. 2013.01.27 - Calculators - Added a over 30 acquistions, from the last three months (see list below) to the gallery, along with exhibit placards, in preparation for an exhibit in Tucson, Arizona.
      • 12.09.24.01 - Faber-Castell TR-2 Slide Rule w/ ESR, sn025120910, INOP, Germany, Scott Reynolds.$300
      • 12.09.24.02 - Fowler's Universal Calculator , Manchester, England, Scott Reynolds.$200
      • 13.01.27.01 - TI-45 sn478125 dc3578RCL, Blue VFD, European version of SR-40, made in Italy. works 9v bat.
      • 13.01.27.02 - Commodore SR7919, sn008053, USA, red LED, 9v bat, works.
      • 13.01.27.03 - Casio J-1 1983, Japan, Electronic Calculator, Min: Sqr Root, VFD, 2 AA works, acquired from Greece
      • 13.01.27.04 - Compex SR-10, Made in Tiawan, Min: Sqr Root, works 2AA.
      • 13.01.27.05 - Melcor SC-535, sn39340, USA, red LED, uses 4 3/5 NiCads (need replaced), untested
      • 13.01.27.06 - Sperry-Remington 809SR, sn2110811, blu VFD, Japan, 5AA works,
      • 13.01.27.07 - Berkey 4030, sn C247165, USA, 2 new AA NiCds, partial display, orange VFD, Scott Reynolds.
      • 13.01.27.08 - Radofin Professional Slide Rule, Model 857, sn10125, HongKong, works w/ 6v jumpered, missing back cover, battery cartridge missing terminal, Scott Reynolds.
      • 13.01.27.09 - Binatone Junior Slide Rule, green VFD digitron, Taiwan, , works 3AA, needs to press cover (battery cartridge) to make contact.,Scott Reynolds.
      • 13.01.27.10 - Commodore SR5190R, sn005434, England, red LED, nicads, INOP using external 420B charger, Scott Reynolds.
      • 13.01.27.11 - Sinclair Scientific, RPN, England, red LED works 4AAA
      • 13.01.27.12 - Enterprex SR-55 Electronic Slide Rule, Green VFD, Tiawan, works 2AA
      • 13.01.27.13 - Commodore SR36, sn05329, England, red LED, nicads, works, Scott Reynolds.
      • 13.01.27.14 - Commodore GL-997R, sn14736, Japan, green VFD, nicads, works on charger, not tested on batteries, Scott Reynolds.
      • 13.01.27.15 - Corvus 310 Electronic Calculator, SN310-151267, red Led, works 4AA
      • 13.01.27.16 - Craig 4521, Japan, Electronic Calculator, Min: Sqr Root, green VFD, 2 AA works
      • 13.01.27.17 - Commodore SR4148R, sn121055, England, red LED, 3 AA nicads, works, Scott Reynolds
      • 13.01.27.18 - Elektronika MK36, USSR, blue vfd, Works partially, with 3 newH320 button cell NMHID batteries, Needs charging, but no charger available.
      • 13.01.27.19 - Teal 826 Memory, sn 408792, Japan,green vfd, works 2AA
      • 13.01.27.20 - Privilig SR53, sn015489, Germany, red LED, works 3AA, Scott Reynolds.
      • 13.01.27.21 - Privilig SR54NC RPN, sn41348, Germany, red LED, works 3AA, Scott Reynolds.
      • 13.01.27.22 - Silver-Reed 80 Electronic Slide Rule, Green VFD, Tiawan, works 1AA
      • 13.01.27.23 - Silver-Reed SR80 Electronic Slide Rule, Green VFD, German Instructions on back, works 2AA
      • 13.01.27.24 - Rockwell 31R Slide Rule Memory, sn 172800, Mexico/usa, works, replaced 2 AA nicads
      • 13.01.27.25 - Casio Memory-8A Electronic Calculator, sqr root, blue vfd, works 2AA bat.
      • 13.01.27.26 - Unisonic 1011 sn025147 Electronic Calculator, sqr root, green vfd, works 4C bat.
      • 13.01.27.27 - Unisonic 767 sn025147 Electronic Calculator, sqr root, green vfd, works 4C bat.
      • 13.02.05.01 - Prinztronic Electronic Calculator, sqr root, green vfd, works 4 AA bat.
      2013.01.26 - SR_Menu - Removed "Avergi" from brands. I simply cannot find an image or record of it in the archives.
      2013.01.26 - ALRO - Added ALRO 200R Patent Slide Rule and Replaced ALRO-Print Spoorweglawaai 922130 (HSRC0093) technical disk, acquired from David Rance (Netherlands), made possible by a gift from Robert L. Allison of Ballard, Washington.
      • 2013.01.26.01 - ALRO 200R Patent Slide Rule
      • 2013.01.26.02 - ALRO-Print Spoorweglawaai 922130
      2013.01.26 - Netherlands - Added RiSta brand to gallery, based on input from David Rance, based on research by Gerard van Gelswijck (Netherlands)
      2013.01.26 - Germany/DDR - Moved RiSta entry to the Netherlands Gallery, based on input from David Rance, based on research by Gerard van Gelswijck (Netherlands)
      2013.01.11 - Germany/DDR - Added Reiss Rietz 60/0015 donated by Susanne Petersson, bio and family photo. Corrected scales on Reiss Rietz-Spezial 3201
      2013.01.11 - SR_Ephemera - Added advertisement from Mar 1936 Popular Mechanics on Civil Engineering Course, including slide rule (Gilson).
      2013.01.12 - Slidecharts - Added 9 specimens donated by Michael P. Maloney
      2013.01.12 - SR_Terms/Encyclopedia - Added reference to Schooley Engineering Co. Popular Mechanics Mar 1936
      2013.01.12 - SR_Library/USA - Added ISRM M252 Fullerton-Acu No 44 Instructions, Donated by Pamela Browne
      2013.01.12 - Friends - Added Susanne Petersson, Michael Maloney, and Carolyn (Randall) Diviancchi, and others.
      2013.01.12 - SR_Library/Japan - Added ISRM M251, Concise 28N Instruction, donated by Michael Maloney, Lacey, Washington
      2013.01.11 - SR_Ephemera - Added seven (7) related photos Found on a web search.
      2013.01.11 - Circular - Added (Replaced) Concise 28N SLR from Michael Maloney, Lacey, Washington added bio and photo
      2013.01.11 - KE - Added (Replaced) N4053-5 20 inch Polyphase sn 771644 (830192) donated by Carolyn (Randall) Diviacchi, Boston, MA.
      2013.01.11 - Sterling - Added(Replaced) Metric Converter (S305) donated by Susanne Petersson, Park Ridge, Illinois. included bio and family photo.
      2013.01.11 - Acumath - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Info by George Keane, Festus, Missouri.
      2013.01.11 - Lawrence - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Info by George Keane, Festus, Missouri.
      2013.01.11 - SR_Ephemera - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Found by George Keane
      2013.01.09 - Received donated personal slide rule and slide charts from Michael Maloney, Lacey, Washington
      • M251 - Concise 28N Instruction manual
      • 13.01.09.01 - SRL Promo Concise 28N circular slide rule and case
      • 13.01.09.02 - HP Reflectometer calculator & Mismatch Error Limits Calculator, 1967 Perrygraf Slide Chart
      • 13.01.09.03 - Anzac Amplifier Design Calculator & 3rd Order Intercept & 3rd Order Spurious-Free Dynamic Range, 1978 Perrygraf Slide Chart
      • 13.01.09.04 - HRB-Singer, Receiver Sensitivity and Noise Figure Slide-Rule, 1959 Perrygraf Slide Chart
      • 13.01.09.05 - AEL, Communication System Calculator, 1971 Perrygraf Slide Chart
      • 13.01.09.06 - ARGO Systems, ESM/ELINT System Calculator, 1980 Perrygraf Slide Chart
      • 13.01.09.07 - HP Measurement Error Calculator, 1968 Perrygraf Slide Chart
      • 13.01.09.08 - Collins Radio Company, Space Systems Calculator, 1966 Perrygraf Slide Chart
      • 13.01.09.09 - Telonic Industries, RF Filter Performance Chart Calculator, 1965 Perrygraf Slide Chart
      • 13.01.09.10 - Andrew Microwave Antenna System Computer & Coaxial Transmission Line Selector, 1986 Andrew Corp. Slide Chart
      2013.01.08 - Received donated personal slide rules from Susanne Petersson, Park Ridge, Illinois
      • 13.01.08.01 - Sterling Metric Converter
      • 13.01.08.02 - Reiss Rietz (Missing Cursor)
      2013.01.07 - Received donated slide rules Owned by Edwin Benjamin Randall, Jr. from Carolyn (Randall) and Valeriano Diviacchi.
      • 13.01.07.01 - K&E 4081-5 20 inch Log Log Duplex decitrig sn082488
      • 13.01.07.02 - K&E N4053-5 20 inch Polyphase sn771644
      2013.01.01 - DemoSR - Added Eugene Dietzgen Co 1760 Series Demonstration Slide Rule. Photo provided By Darryl Willis

      2012.12.28 - Nordic - Changed name of Denmark/Sweden gallery to Nordic (DK/SE).
      2012.12.28 - Australia - Added higher resolution scans of Service Slide Rule model REED, with white paper from David Rance, Netherlands.
      2012.12.26 - Switzerland - Created this gallery which contains Kern, LOGA and CURTA.
      2012.12.26 - German - Created this gallery from MiscEuro, which contains 17 brands.
      2012.12.26 - MiscEuro - Pulled German/DDR, Swiss and CURTA manufacturers and created 2 new galleries, The Germany/DDR and Switzerland (Kern and LOGA) and Liechenstien (CURTA) Manufacturers Switzerland
      2012.12.24 - SR_Library_Europe - Added Calculimetre Charpentier Instructions
      2012.12.24 - SR_WhosWho - Added Jacobus Ahrend (1875-1956) founder of the J.Ahrend company in the Netherlands.
      2012.12.23 - ALRO - Created this exclusive gallery of the Dutch Company ALRO using 53 specimens in Herman's Slide Rule Catalog (HSRC) gallery, found on ISRM
      2012.12.23 - Netherlands - Created this gallery from MiscEuro and specimens in Herman's Slide Rule Catalog (HSRC) gallery
      2012.12.23 - MiscEuro - Pulled Dutch manufacturers and created 2 new galleries, The Netherlands and Dutch Manufacturer ALRO
      2012.12.22 - Italy - Added Marconti 15R, Goliardo, Salmoiraghi Projection Slide Rule, Faviani Calcolina, scans by Andrea Celli, Italy
      2012.12.22 - MiscWorld - Split into two new galleries, Orient (East Asia - China, Korea, India) and Americas (Mexico, Brazil, Argentina)
      2012.12.20 - SlideCharts - Added Derck's Trig Simple-Fyer Dial and Calculator Specialties Heating Calculator. Donated by Robert L. Allison, Ballard, Washington
      2012.12.17 - SRM_Home - Updated gallery links - 45 galleries now!
      2012.12.17 - SRM_Menu - Updated main gallery links. Removed 'Misc' from gallery names (in process)
      2012.12.17 - Denmark - Building new gallery with images from MiscEuro. DIWA and UTO slide rules are featured.
      2012.12.17 - MiscEuro - Moved Danish slide rules to new Nordic gallery
      2012.12.17 - France - Building new gallery with images from MiscEuro. Tavenier-Gravet and Marc (with UNIS marks) slide rules are featured.
      2012.12.17 - MiscEuro - Moved French slide rules to new France gallery
      2012.12.17 - MiscEuro - Added Tavenier-Gravet Model Depose 10-13, Gamma 25R, scans from Giovanni Breda Collection, Italy.
      2012.12.16 - SR_Menu - Added Altma, Antica, Azzola, Cellograf, La Filotechnic, Mercantoni, Mathematicus, Orions, Plastigraf, Salmoiraghi, and Teacher. all in Italy.htm
      2012.12.16 - Italy - Building new gallery with images from MiscEuro and scans from the Giovanni Breda Collection.
      2012.12.16 - MiscEuro - Moved Italian slide rules to new Italy gallery
      2012.12.16 - Aristo - Added model 80123 Martin Space Rule 1962, scan provided by Rod Lovette Collection
      2012.12.16 - Aerospace - Added Martin Space Rule 1962 Aristo 80123, scan provided by Rod Lovette Collection
      2012.12.16 - SR_WhosWho - Added Washington Sabatini (1923-1966) who invented the W. Sabatini Concrete Calculator.
      2012.12.16 - MiscEuro - Added C.A. Ferrero Concrete Calculator based on Washington Sabatini's designs. Included reference pictures of earlier versions
      2012.12.15 - Ephemera - Added photo from TV screen of Circular Slide Rule In The 2005 Movie "World's Fastest Indian", starring Anthony Hopkins.
      2012.12.15 - SR_Terms - Added UNIS - Union Nationale Inter Syndacale. A French organization monitoring the quality of French goods. Contributed by Andrea Celli. Italy.
      2012.12.11 - Hemmi - Added(replaced) Model 47, c1932 (Paul Ross Image) slide rule, donated by Robert vented the W. Sabatini Concrete Calculator.
      2012.12.16 - MiscEuro - Added C.A. Ferrero Concrete Calculator based on Washington Sabatini's designs. Included reference pictures of earlier versions
      2012.12.15 - Ephemera - Added photo from TV screen of Circular Slide Rule In The 2005 Movie "World's Fastest Indian", starring Anthony Hopkins.
      2012.12.15 - SR_Terms - Added UNIS - Union Nationale Inter Syndacale. A French organization monitoring the quality of French goods. Contributed by Andrea Celli. Italy.
      2012.12.11 - Hemmi - Added(replaced) Model 47, c1932 (Paul Ross Image) slide rule, donated by Robert L. Allison of Ballard, Washington.
      2012.12.11 - Nestler - Added(replaced) Model Nr. 0115 Techniker (HRSC gallery image) pocket slide rule, donated by Robert L. Allison of Ballard, Washington.
      2012.12.10 - SR_Terms - Added Tamaya & Company entry which sold re-branded Hemmi Slide Rule from 1913-1932
      2012.12.10 - Hemmi - Added note at top of page mentioning Tamaya & Company of Tokyo, Japan as another rebranded Hemmi slide rule company.
      2012.12.10 - SR_Home - All slide rule specimens, scans, photos and ephemera are now organized into one of 40 galleries;
      2012.12.10 - Unique - Created Manufacturer Unique gallery, moved from British Gallery.
      2012.12.10 - Blundell - Created Manufacturer Blundell Harling/BRL gallery, moved from British Gallery.
      2012.12.10 - Thornton - Created Manufacturer PIC/British Thornton gallery, moved from British Gallery.
      2012.12.10 - British - Deleted Manufacturers PIC/British Thornton, Blundell/BRL, and Unique from this gallery, moved to their own Gallery.
      2012.12.09 - MiscJapan - Added Manufacturer Jakar (Fuji) to this gallery, moved from British Gallery.
      2012.12.09 - British - Deleted Manufacturer Jakar (Fuji) from this gallery, moved to MiscJapan Gallery.
      2012.12.09 - Manuals - Added Service Slide Rule, Model REED Instructions, scan by David Rance's Collection at www.sliderules.nl
      2012.12.09 - Australia - Added Service Slide Rule, Model REED, from David Rance's Collection at www.sliderules.nl
      2012.12.08 - SR_WhosWho - Added Paul Jones (1896-1945), founder of Festus Mfg (1938) which later became Acu-Rule (1940)
      2012.12.07 - SR_WhosWho - Added George L. Lockhart, founder of Slide Rule & Scale Engineering Company, 1930-1950, and Paul Jones
      2012.12.07 - Manuals/MiscUSA - Added Slide Rule & Scale Company Brick & Tile Computing Slide Rule Instructions, Scan provided by David Rance, The Netherlands
      2012.12.07 - MiscUSA/SR&SECo - Added Slide Rule & Scale Company Brick & Tile Computing Slide Rule, Scan provided by David Rance, The Netherlands
      2012.12.07 - Dietzgen - Added Dietzgen 1737 "Sigma" Instructions to specimen.
      2012.12.03 - Ricoh - Added (Replaced) Sans & Strieffe No. 311 (S435) dcP.S-2 log log slide rule. Added logo to Sans & Streieffe section of gallery.
      2012.12.03 - Acumath - Added Fullerton-Acu Model 1240 Pocket slide rule, with bio, Donated by Pamela Lanier Wolfe Browne, Kernersville, North Carolina.
      2012.12.03 - Dietzgen - Added Eugene Dietzgen D&P Improved Slide Rule, with bio, Donated by Pamela Lanier Wolfe Browne, Kernersville, North Carolina.
      2012.12.03 - MiscEuro/DIWA - Added DIWA 851/4 pocket duplex. Donated by Ron Dies Architecture, Vancouver, BC, Canada.
      2012.12.03 - Hemmi/Hughes-Owens - Added Hughes-Owens 1771 dcJB (Feb 1959). Donated by Ron Dies Architecture, Vancouver, BC, Canada.
      2012.12.02 - Nestler - Added(Replaced) c1920 Mannheim (S403) 12.10.01.01
      2012.12.02 - KE_Standard - Added K&E 4090-3 sn502283 [rare]
      2012.12.02 - MiscJapan - Added Royal Executive No. 5091 donated by Ville Koskinen of the UK.
      2012.12.02 - Pickett - Added additional scans of PR-13 and PR Trig rules showing transparency, corrected description. Provided by Cassou Olivier, France
      2012.12.01 - Display - Installed an exhibit in the broomfield Public Library, consisting of slide rules, abac1 and electronic slide rule calculators. Runs through Jan 31, 2013.
      2012.11.22 - Received donated slide rules from the collection of Robert L. Allison of Ballard, Washington.
      • 12.11.22.01 Pickett Model N3-ES Power Log Exponential Log Log, with leather sleeve.
      • 12.11.22.02 Acu-Math No. 400 Mannheim with sleeve.
      • 12.11.22.04 Sun Hemmi's Bamboo Slide Rule Model 47 c1930, with sleeve. Has Quot. and Prod. symbols with decimal aids.
      • 12.11.22.03 Pickett Model 1010 copyright1948, artwork 271 & 74
      • 12.11.22.05 K&E Gold Tie Clasp
      • 12.11.22.06 Nestler Nr.0115 Techniker, pocket slide rule
      • 12.11.22.07 Concise No. 320 Circular Slide Rule
      • 12.11.22.08 Calculator Specialties Co. Slide Chart. Heating Calculator
      • 12.11.22.09 Derck's Guage Dial Co. SIMPLE-FYER DIAL, Trigonometry Simplified, Disk chart. Copyright 1943 James Derck
      2012.11.20 - Received donated slide rules from Ron Dies, an architect in Vancouver, BC, Canada.
      • 12.11.20.01 Hughes-Owens (Sun Hemmi) 1771 dcJB
      • 12.11.20.02 DIWA Darmstadt No. 851/4
      2012.10.22 - Received donated slide rules from Pamela Lanier Wolfe Browne, Kernersville, North Carolina. Note: Pamela is the widow of Harry Edson Browne (1933-2006). Harry Browne was an inspirational speaker who wrote 19 books that sold more than 2 million copies. In 1996 and 2000 he was the nominee of the Libertarian Party for President of the United States.
      • 12.10.22.01 Eugene Dietzgen D&P Improved Slide Rule, Patent June 28, 1898, railroad track style divisions. Owned by PLW Browne's Godmother's Husband: Major Paul C. Allred, Jr., with photo and bio.
      • 12.10.22.02 Fullerton-Acu Model 1240 Pocket slide rule, owned and used by Pamela L.W. Browne, with photo and bio.
      2012.10.07.01 - Acquired K&E 4090-3 sn502283, made possible through slide rule and financial donations
      2012.10.01.01 - Acquired Albert Nestler c1920 slide rule made possible through slide rule and financial donations
      2012.09.26 - MiscUSA - Added four C-Thru slide rules, Version 1 and 2 (both with cursors), proportional and Concrete calculator, donated by Huang Collection
      2012.09.25.02 - Acquired Sans & Streiffe (Ricoh) No.311, made possible through slide rule and financial donations
      2012.09.25.01 - Received donated Royal Executive No. 5091 from Ville Koskinen of the UK.
      2012.09.24 - Dietzgen - Added pocket slide rule (dated c1915). Scan by Cassou Olivier, France.
      2012.09.24 - Ricoh - Added Eco-Bra 1460 pocket slide rule. Scan by Cassou Olivier, France.
      2012.09.24 - Ricoh - Added Compass 403 pocket slide rule. Scan by Cassou Olivier, France.
      2012.09.24 - Pickett - Added Log-Log slide rule, based on the PR-12 projection rule. Scan by Cassou Olivier, France.
      2012.09.16 - Faber - Added (Replaced) Verlag Chemie Pocket Slide Rule ISRM 12.09.15.01 (SRC357871)
      2012.09.16 - Pickett - Added (Replaced) Microline 121C-T (S147) with Retail card version donated by Oughtred Society
      2012.09.16 - SR_WhosWho - Added André Charvoz, founder of Charvoz and partner Abel Gottheimer founder of Roos
      2012.09.16 - Dietzgen - Corrected maker of 1774-M from Reiss to Ecobra, as instructed by French collector Olivier
      2012.09.15 - Calculators - Added Melcor SC-635 and SC-645 (note ISRM had to re-invent the battery module and hard wire into the calculators)
      2012.09.12 - Received donation from Blane Rhoten of Maryland, now a Friend of the Museum
      2012.09.05 - Received donation from Raymond Lejuez of New Jersey, now a Friend of the Museum
      2012.09.04 - Calculators - Added some support text and pictures on slide rules vs calculator longivity, and rearranged html for appearance.
      2012.09.03 - Calculators - Added Compucorp 322G Scientist (1971) and TI Programmer (1977) donated by Huang Collection.
      2012.09.03 - Lawrence - Added (Replaced) 8-B (S028) with one from Mike Konshak's personal collection that he used at 14, included an article and picture on rocketry and slide rules
      2012.09.02 - Soviet, SR_Menu, SIC - Corrected broken links found by John Oakhill in Australia. Thanks for the Help!
      2012.09.01 - Pickett - Added Model 3 Deci Multiphase Log Log slide rule (2nd Version). Belonged to H. McFadden. Donated by Laurie Deiter. Minor reformatting at end of page.
      2012.09.01 - MiscUSA - Added Walter J. Kudlaty catagory and his Press Tonnage Calculator slide rule. Belonged to H. McFadden. Donated by Laurie Deiter
      2012.09.01 - SR_WhosWho - Added Walter J. Kudlaty, designer of the Press Tonnage Calculator slide rule
      2012.09.01 - Received donation of slide rules and electronic calculators from Tom and Laurie Deiter, Louisville, CO
      • 12.09.01.01 Pickett Model 3 Deci-Multiphase Log Log (c) 1947 Belonged to H. McFadden (father of Laurie Deiter)
      • 12.09.01.02 Walter J. Kudlaty Press Tonnage Calculator, (c)1949
      • 12.09.01.03 Texas Instruments TI-35 Plus Calculator dcRCI-5187(works w/ new bat)
      • 12.09.01.04 Sharp EL-506S Scientific Calculator sn16155578 (1978)(works w/ new bat - missing screws)
      2012.08.31 - Received donation from John Oakhill of Australia, now a Friend of the Museum
      2012.08.29.01 - K&E_Standard - Added(Replaced) 4080-3 sn838161 (4080-3 sn824568) belonging to Reed W. Campbell. Included US Naval Academy logo and 1945 class pin.
      2012.08.25.01 - Received donation of K&E 4080-3 sn838161 1942 Issued to Reed W. Campbell at the US Naval Academy. Donated by daughter Barbara Campbell of Livermore, CA
      2012.08.27 - Received additional lot of donations of electronic calculators belonging to the Huang Collection. TI calculators and PC100A printers, Compucorp 322G Scientist.
      • 12.08.27.01 Compucorp 322G Scientific
      • TI PC100A (3) ...
      • 12.08.27.07
      2012.08.24 - SRM_Home - Removed Scientific American article and Berkely Breathed cartoon links as these appear in the Ephemera page.
      2012.08.24 - Calculators - Added OMRON 8SR sales sheet as jpg and pdf.
      2012.08.23 - SR_Library_Catalogs - Added Sun Hemmi 1926 'Calculating Rule' Catalog
      2012.08.23 - Hemmi - Added Sun Hemmi 1926 'Calculating Rule' Catalog at bottom of page
      2012.08.22 - Abaci - Added Sharp Sorokaru (Soroban+Calculator_ Models EL-428 and EL-8048
      2012.08.22 - Calculators - Added Sharp Sorokaru (Soroban+Calculator_ Models EL-428 and EL-8048 in post 1980 section
      2012.08.21 - Calculators - Added HP-21, HP-25, HP-25C, HP-29C, HP-31E,HP-32E,HP-33C,HP-34C,HP-37E,HP-38C,HP-41C,HP-41CV. Donated by Huang Collection. Added Exhibit placards and manuals where applicable.
      2012.08.21 - Received donation from David O'Brien of Arizona, now a Friend of the Museum
      2012.08.21 - Calculators - Added HP-55, HP-80, TI-30-II, TI Bus Analyst II, HP-67, donated by Huang Collection. Added Exhibit placards and manuals
      2012.08.20 - SR_Library_Books - Added Scan of "The Slide Rule - Tutortext By Robert Saffolf and Ann Smalley - 1962" Ref M199. Scanned by Kent Berglund, PhD.Cary, IL. Corrected broken link on 3 thumbnails.
      2012.08.17 - SR_Ephemera - Corrected Joshua Routledge (1773-1829) birthdate. Added picture of HP-45 with K&E slide rule from HP-45 Handbook, Page 6.
      2012.08.17 - SR_WhosWho - Added Joshua Routledge (1773-1829) inventor of the Routledge Slide Rule 1805
      2012.08.16 - Received donation of TI calculators belonging to the Huang Collection. These will replace many TI models in the Calculator gallery
      • 12.08.16.01
      • ...
      • 12.08.16.37
      2012.08.15 - Received donation of HP calculators belonging to the Huang Collection These will replace many HP models in the Calculator gallery
      • 12.08.15.01
      • ...
      • HP-35, HP-80, HP-45, HP-55, HP-67
      • HP-21, HP-25, HP-25C, (most INOP)
      • HP-31E, HP32E, HP-33E, HP34C, HP-37E, HP-38E. HP-41C (most INOP)
      • LCD Calculator Models - HP-11C, HP-15C
      • HP-71B and HP-75C Portable Computers
      • ...
      • 12.08.15.45
      2012.08.15 - SR_Home - Added banner and link to pictures of exhibit at Louisville, CO public Library. Announced next exhibit at the Broomfield Public Library.
      2012.08.15 - SR_Displays - Added pictures of exhibit at Louisville, CO public Library. 2012.08.14 - Ephemera - Added pictures of Janis Lyn Joplin, famous rock singer, when she was a member of a slide rule club in 1959, Thomas Jefferson HS, Port Aurthur, TX.
      2012.08.14 - Received donation of 7 Abaci belonging to the Huang Collection
      2012.08.09 - - Received donation of 3 'Slide Rule' Calculators from Scott Reynolds, Hemut, CA. Vintage Calculators Inc.
      • 12.08.09.03 Nestler T52
      • 12.08.09.02 Omron 8SR
      • 12.08.09.01 Omron 88SR
      2012.08.06 - Received donation from Justin Moretti of Canada, now a Friend of the Museum
      2012.08.06 - Aerospace - Added Cox & Stevens B-24 Load Adjuster Slide Rule. Donated by Lyle Wells of Henderson, Nevada
      2012.08.06 - Pickett - Added N4-ES (1958-1959) Vector Type Log Log and 1010-T (1957) Trig with Cast Metal Braces. Donated by Lyle Wells of Henderson, Nevada
      2012.08.05 - Received Donation of Slide Rules and book from Lyle Wells, Henderson, NV. c/o Donna Silva, with bio and personal photo.
      • 12.08.05.01 - Cox & Stevens B-24 Load adjuster Slide Rule, for Tail Number 49085
      • 12.08.05.02 - Pickett N4-ES (1958-1962) Vector Log Log Slide Rule
      • 12.08.05.03 - Pickett 1010-T (1957) Trig Slide Rule with die cast braces and cursor blocks
      • 12.08.05.04 - Book, Slide Rule Simplified, by C.O. Harris, American Technical Society
      2012.08.01 - Display - Installed Exhibit at the Louisville Public Library. Theme: Electronic Slide Rule Calculators and the demise of the Slide Rule and Abaci Industry. 2012.07.18.01 - Sterling - added 651 Metric Convertor donated by Russ Anthony in memory of his Father Ward B. Anthony
      2012.07.18 - SR_Ephemera - added addometer adding machine Ad from modernmechanix, Dec1947
      2012.07.16.01 - British - Added Fisher Controls Valve Sizing Slide Rule to Blundell Harling catagory, ref BHL FC3540
      2012.07.15 - Abaci/Ephemera - Created new gallery - added 85 pictures of people using Abaci, Soroban and Schoty , vintage and modern past.
      2012.07.05 - SR_Loaner - Added pictures from Collège André-Grasset in Montreal, Canada. Professor Paul Guertin's students using slide rules provided by ISRM
      2012.07.02 - Sterling - Added(Replaced) 594 Decimal Trig Log Log (ISRM), Donated By the Huang Collection
      2012.07.02 - MiscJapan - Added Japanese_Mannheim_CJEdwards, Japanese_Mannheim_wRulers_ITT_Defense, Donated By the Huang Collection
      2012.07.02 - MiscEuro - Added Diwa 601-1 dc294 Components Inc, Diwa 601-1 dc012 Grundfoss Pumps,Donated By the Huang Collection
      2012.07.02 - Faber - Added(Replaced) 2/82 Duplex Falt Plate ends (S205), 62/82 Pocket (P030) ,Donated By the Huang Collection
      2012.07.02 - Pickett - Added(Replaced) N600-T, LogLog, 140-T Microline LogLog Version2, 140-ES Microline LogLog Version2, Model 61-C Concrete Calculator, Model 62 Promotional, Model N1010-T RndBlkLogo, N200-ES in Box (P148), N200-ES York in Box,Donated By the Huang Collection
      2012.07.02 - Hemmi - Ubdated background on Byoutou Slide rule from first hand experience of Dr. Di Chen
      2012.06.30 - K&E Standard - Added 4098 sn27319 Pocket, K&E 68-1100 Decilon sn221850, Donated By the Huang Collection, with bio pic
      2012.06.30 - Nestler - Added(Replaced) 0292 MultiMath Duplex dc170 (S207), Donated By the Huang Collection, with bio pic
      2012.06.30 - MiscEuro - Added Technostyl 41/R Italy, Donated By the Huang Collection, with bio pic
      2012.06.30 - Acu-Math Added Fullerton-Acu 600 Trig, Fulerton-Acu 400 Mannheim, Donated By the Huang Collection, with bio pic
      2012.06.29 - Hemmi - Added(Replaced) Hemmi 153 Electrical Engineer, Sep 1961 (S230) Donated By the Huang Collection, with bio pic
      2012.06.29 - Post - Added(Replaced) 1460 Versalog sn826144 Black COS (S078),1460_Versalog_dcRF_sn817456 Green COS (S079), Versalog II (w/A scale) noSN, dcTE (S080), Donated By the Huang Collection
      2012.06.29 - Pickett - Added(Replaced)Pickett 500 Ortho-Phase snE911050 from Peter Chmielowiec of Louisville, Colorado, with photo and bio.
      2012.06.29 - Received donation of magnesium Pickett 500 Ortho-Phase snE911050 from Peter Chmielowiec of Louisville, Colorado
      2012.06.28 - Dietzgen - Added(Replaced) 1738 Multilog Multiplex Style M and 1744 Polymath sn300543(S286 and S341) , Donated By the Huang Collection
      2012.06.28 - Dietzgen - Added(Replaced) 1734 Microglide sn056181 (S277) Donated By the Huang Collection, with bio pic
      2012.06.28 - SRLoaner/NorthwoodHS.htm - Added pictures from 2012 Northwood High School, Silver Springs. Maryland, Leor Baldinger's class.
      2012.06.28 - Aristo - Added(Replaced) 0968 Studio (S100 V2) dc64-115, Version 2 and 0903-T Scholar Charvoz; Donated By the Huang Collection, with bio pic
      2012.06.28 - MiscUSA - Added 3 Foxboro Valve Sizing Slide rules; Donated by Carlee Heit, the Ray Heit Collection and NatGasEdu.com
      2012.06.28 - Circular - Added Concise 320 with Calendar (1968-1981), Donated By the Huang Collection, with bio pic
      2012.06.27 - MiscUSA - Added(Replaced) Guedon, Camden, New Jersey, metal vest pocket slide rule 1943 (P118), donated by Scott Reynolds, Vintage Calculator inc.
      2012.06.26 - Pickett - Added(Replaced) N-531-ES CREI Donated By the Huang Collection (Replaced item from Andy Keller Donation)
      2012.06.25 - MiscJapan - Added(Replaced) Bristol Line No. 19-5 (P047), Donated By the Huang Collection, with bio pic
      2012.06.25 - British - Removed Misc British catagory, moved Bristol Line slide rule to MiscJapan. Changed SR_Menu link.
      2012.06.25 - Slide Rule Loaner - Received pictures of Northwood High School students in Silver Spring, MD using ISRM supplied slide rules
      2012.06.25 - MiscEuro - Added(Replaced) Diwa No.720 Polylog (S336), Donated By the Huang Collection, with bio pic
      2012.06.25 - Nestler - Added Albert Nestler A-G Mannheim c1920, english equivalents [etsy $20]
      2012.06.24 - Hemmi/Odelco - Added Hemmi 259-D Mechanical Engineer Donated By the Huang Collection, with bio pic
      2012.06.24 - Ricoh - Added(Replaced) Lutz 252 U.S. Government (S094) Donated By the Huang Collection, with bio pic
      2012.06.24 - Pickett - Added(Replaced) Microline 140 Red LogLog (S330), N600-ES LogLog Pocket, No.120 (S133), N1010-ES Trig (S178); Donated By the Huang Collection
      2012.06.24 - Received approx 60 slide rules belonging to the Huang Collection
      • 12.06.24.01 Faber-Castell 2/82 in plastic case [4] for gallery*
      • 12.06.24.02 Concise 320 Calendar (1960-1981) Conversions plastic sleeve[4] for gallery*
      • 12.06.24.03 Faber-Castell 62/82 in leather sleeve [4] for gallery*
      • 12.06.24.04 Hemmi/Odelco 259-D Mechanical Engineer [4] for gallery*
      • 12.06.24.05 Pickett 140-ES Red LogLog, leatherette sleeve [4] for gallery*
      • 12.06.24.06 Ricoh Lutz 252 U.S. Government Leather sleeve [4] for gallery*
      • 12.06.24.07 Pickett 120-ES w/sleeve [4] for gallery*
      • 12.06.24.08 Pickett N3-ES w/leather sleeve [4] fundraiser
      • 12.06.24.09 Hemmi 153 dc LI (1961) w/cardboard sleeve [4] for gallery *
      • 12.06.24.10 Pickett Model 61C concrete Calculator Leather sleeve [4] for gallery
      • 12.06.24.11 Pickett Model 62 Trig Westville Electric Co Ad Western Electric sleeve [4] for gallery
      • 12.06.24.12 Pickett N600-ES LogLog Leather sleeve [4] - traded to Phillip Rodley in New Zealand*
      • 12.06.24.13 Pickett N600-T LogLog Leather sleeve [4] for gallery*
      • 12.06.24.14 Pickett 140-T Microline LogLog, Version 2, leatherette sleeve [4] for gallery*
      • 12.06.24.15 Pickett 140-ES Microline LogLog, Version 2, leatherette sleeve [4] for gallery*
      • 12.06.24.16 Pickett 140-ES Microline LogLog, Version 2, leatherette sleeve [4] fundraiser
      • 12.06.24.17 Pickett 120, leatherette sleeve [4]* for gallery*
      • 12.06.24.18 Pickett N1010-ES Trig in Retail Box, Manual, leather sleeve [5] for gallery*
      • 12.06.24.19 Diwa Polylog No720 in Box, Manual, leather sleeve [5] for gallery*
      • 12.06.24.20 Aristo Studio 0968, dc64 115, partial plastic sleeve [3] for gallery*
      • 12.06.24.21 Post Versalog sn826144 dcHF (June 1957) Black COS w/leather sleeve [3] for gallery*
      • 12.06.24.22 Post Versalog sn817456 dcRF (June 1967) Green COS w/leather sleeve [4] for gallery*
      • 12.06.24.23 Post Versalog II (w/A scale) noSN, dcTE (May 1969) Green COS, w/leather sleeve [4] for gallery*
      • 12.06.24.24 Dietzgen 1734 Microglide sn056181 w/leather sleeve [4] for gallery*
      • 12.06.24.25 Dietzgen 1738 Multiphase Style-M, w/leather sleeve [4] for gallery*
      • 12.06.24.26 Post Versalog sn220355 dcLG (July 1961) Blue COS w/leather sleeve [3] fundraiser/loaner
      • 12.06.24.27 K&E 68-1100 Decilon sn221850 w/leather sleeve [4] for gallery*
      • 12.06.24.28 K&E 4098 Pocket sn27319 !FRAGILE! w/leather sleeve [4] for gallery*
      • 12.06.24.29 Dietzgen 1744 Polymath Multiplex DecTrigType, sn300543 w/insert w/leather sleeve [4] for gallery*
      • 12.06.24.30 Fuji 1200 w/sleeve [4] for gallery *
      • 12.06.24.31 Fullerton-Acu(math) Trig w/ retail box, manual & sleeve [4] for gallery*
      • 12.06.24.32 Technostyl 41/R Italy Pocket w/sleeve [4] for gallery*
      • 12.06.24.33 Bristol Line No. 19-5, Made in Japan [4] for gallery*
      • 12.06.24.34 Bristol Line No. 18-4, Made in Japan [4] for gallery*
      • 12.06.24.35 Diwa No.601-1 Early, dc294, Ad:Components, Inc, Arizona Division, Made in Denmark [4] for gallery*
      • 12.06.24.36 Diwa No.601-1 Later, , Ad:Grundfoss, Bjerringbro Pumpefabrik, Made in Denmark [4] for gallery*
      • 12.06.24.37 Japanese Mannheim with rulers on edge, ITT Defense Ad [4] for gallery*
      • 12.06.24.38 Japanese Basic Mannheim, CJ Edwards Ad [4] for gallery*
      • 12.06.24.39 Nestler Nr.0292 Multimath-Duplex dc170 [5] for gallery*
      • 12.06.24.40 Pickett N1010-ES Trig Round Black Logo, leather sleeve [4] fund raiser
      • 12.06.24.41 Pickett N500-ES HI LogLog leather sleeve [4] fund raiser
      • 12.06.24.42 Pickett N902-ES Simplex Trig cardboard sleeve [4] fund raiser
      • 12.06.24.43 Pickett N1010-ES Trig Round Black Logo, leather sleeve [4] fund raiser
      • 12.06.24.44 Pickett N500-ES HI LogLog leather sleeve [4] fund raiser
      • 12.06.24.45 Pickett N500-ES HI LogLog leather sleeve [4] fund raiser
      • 12.06.24.46 Pickett N500-ES HI LogLog leather sleeve [4] fund raiser
      • 12.06.24.47 Pickett N1010-T Trig Red and Black Text, Square Braces, Round Black Logo, leather sleeve , Hauserman written on stock [4] for gallery*
      • 12.06.24.48 Pickett N902-T Simplex Trig 1959, Square Braces, Round Black Logo, cardboard sleeve [4] fund raiser
      • 12.06.24.49 Pickett N902-T Simplex Trig 1960, Curved Braces, Round Black Logo, cardboard sleeve [4] for gallery*
      • 12.06.24.50 Pickett N-531-ES Capitol Radio Engineering Institute - 1960 [4] for gallery*
      • 12.06.24.51 Pickett N803-ES Synchro Log Log (stains on scale)[3] fund raiser
      • 12.06.24.52 Pickett N200-ES Pocket Trig, NIB, Curved Braces, Round Black Logo leather sleeve, Retail Box [4] for gallery*
      • 12.06.24.53 Pickett N200-ES Pocket Trig, NIB, Curved Braces, Modern Logo, leather sleeve, Retail Box, York Promotional[4] for gallery*
      • 12.06.24.54 Aristo Scholar 0903-T Charvoz, dcG5968, partial cardboard sleeve [3] for gallery*
      • 12.06.24.55 Pickett N1010-T Trig Red and Black Text, Square Braces, Round Black Logo, leather sleeve , Hayashi written on sleeve [4] fundraiser
      • 12.06.24.56 Sterling 594 Decimal Trig Log Log, brown leatherette sleeve [3] for gallery*
      • 12.06.24.57 Sterling 594 Decimal Trig Log Log, no sleeve, with manual [4] fundraiser.
      • 12.06.24.58 Fullerton-Acu 400 Mannheim [3] for gallery*
      • 12.06.24.59 C-Thru_Generic_SlideRule_Version1_DonatedByHuangCollection for gallery*
      • 12.06.24.60 C-Thru_Generic_SlideRule_Version2_AMECO_DonatedByHuangCollection for gallery*
      • 12.06.24.61 C-Thru_GersonCo_BituminousConcreteCalculator_SR_HuangCollection for gallery*
      • 12.06.24.62 C-Thru_ProportionalSlideRule_WarnerBros_DonatedByHuangCollection for gallery*
      • 12.06.24.63 Sterling 594 Decimal Trig Log Log, no sleeve, with manual [4] fundraiser.
      • 12.06.24.64 K&E N4083-3 LogLogDuplex Vector, sn618984 (1952) KERCS. restored 1-8-14 with Cursor from another SR. fundraiser.
      • 12.06.24.65 Acumath No.500 With formed Sheetmetal end braces.
      2012.06.23 - Received 2 Hemmi slide rules, Electro with Decimal Keeper and 257 Chemical Engineer, belonging to Jiro Higuchi and his father. Kamakura, Japan.
      2012.06.23 - Calculator - Added HP9100A (2012.06.23.01), HP-27 (2012.06.23.02) and Radio Shack EC-420 (2012.06.23.03)slide rule calculators.
      2012.06.23 - Post - Added(replaced) Pocket Dual 10"/5" slide rule (P088) [etsy] .
      2012.06.22 - Received donation from G. Larry Kehl now Friends of the Museum
      2012.06.20 - Calculator - Added scanned manual for 1974 Commodore SR-36 Electronic Slide Rule Calculator.
      2012.06.20 - Abuci - Added historical pictures and 2nd specimen to gallery, with historical trivia
      2012.06.19 - British - Added Wollaston Chemical Slide Rule
      2012.06.18.05 - Pickett - Added Model 1000 Ortho-Phase Duplex magnesium sn02B4935
      2012.06.18.02/01 - MiscUSA - Added Henschel No. 1096 Made by Nestler; and Gerber Variable Scale Model TP007100B.
      2012.06.18.03 - Hemmi - Added 153 Occupied Japan, owned by Rear Admiral Forrest A. Rhoads (1898-1965), Donated by Rod Vance, Australia
      2012.06.18.04 - Dietzgen - Added(replaced) Phillips 1740 (S115), owned by Radm Forrest A. Rhoads (1898-1965)
      2012.06.17 - Terms - Added PI to many decimal places. Did you know all slide rules, calculators or abaci images at ISRM are set at PI?
      2012.06.17 - Abuci - Added historical pictures and first specimem, donated by Joel Haertling of Boulder, Colorado
      2012.06.17 - SR_Ephemera - Added two new pictures, United Airline Mechanics and a modern Cartoon
      2012.06.16 - Received donation of a Hemmi 153 from Rod Vance, Australia. This belonged to Rear Admiral Forrest A. Rhoads
      2012.06.12 - Received donation from Riki Nakamoto of Hawaii, now Friends of the Museum
      2012.06.11 - Media - Mike Konshak, the ISRM curator was quoted for an article in the San Francisco Chronicle, "New Education Standards End Rote Learning"
      2012.06.10 - Received donation to cover purchase of slide rule owned by rear admiral Rhoads, by Rod Vance, of Australa.
      2012.06.09 - Abuci - Created new gallery for Abacus, Suan Pan, Shoty, and Sorobans
      2012.06.08 - Received donation of an HP 9100A sn816-0047 desk top 'slide rule' calculator. By Alexey Davies of Boulder, Colorado. Was a Bell Telephone Labs (BLT) asset.
      2012.06.08 - Aerospace - Added A4D Skyhawk Computer, owned by Astronaut Paul Weitz
      2012.06.07 - Received donation from Dr. Paul Tarantolo of Texas and Mark Johnson, now Friends of the Museum
      2012.06.03 - Dietzgen - Added 1745 USMC Issue - Magnifying/Frameless Cursor. Purchased at a Denver Antique Store in 2011
      2012.06.02 - Aristo and MiscEuro/Klawun- Added 0908 TriLog, Klawun Feinmessinstitut Slide Rule donated by Ted Hume, Texas (in 2009)
      2012.06.02 - Pickett - Added Collins Radio C-19-T Microwave Transmission Slide Rule donated by James Price, Tacoma, Washington, included short biography
      2012.06.02 - Received donation of Thacher Cylindrical Slide Rule. from Dick Rose, Ohio
      2012.06.02.01 - Received donation of Pickett C-19 Collins Radio Slide Rule with 4 inserts. from James Price, Washington
      2012.06.01 - Received donation from ISRG members: David Rance of the Netherlands, John Stevenson of Canada, Robert Witt of New York, Andrew Currie of New Zealand , now Friends of the Museum
      2012.05.31 - Received donation from ISRG members: Cyril Catt of Australia, Angel Carrasco Conejo of Spain, Gregory McClure of Colorado, Roi Gift of Washington, Rod Vance of Australia, Thomas Yorker of New York. now Friends of the Museum
      2012.05.31 - Display - The 'Slide Rule' Calculator exhibit was dismantled in the Boulder Public Library and put up for the next exhibit.
      2012.05.31 - Ephemera - Add slide rule watch ad, Modern Mechanix 1959, Cartoon by Scott Hilburn, and 3 photos of the Missouri Univ. Mascot Joe Miner
      2012.05.31 - Library/Pickett - Added Pickett Insert Part No 25-416, Basic Slide Rule Instructions
      2012.05.31 - Library/British - Added Helix Regal Series Instructions. Added Unique_Half-Hour_Instructions Donated by Richard Davis
      2012.05.30 - Library/Pickett - Added Pickett 101-C Dial-Rule instructions (1957). Donated by Ann Kilby, Kingston, Washington
      2012.05.30 - Received donation from ISRG members: Jack Segal, David Ogden, Bennie Tschoerner of Texas, Alvaro Gonzalez, Frank Robertson, John Ireton, Richard Rose of Ohio. Sean Sanderson of Vermont, Anthony Nevett of New Zealand, Michael Mjelde, Ian Lodge of UK, Hans Milton of Sweden, Jose Gabriel Fernandez of Spain, William Hill of Texas, Peter Fox of UK, Jeremy McCarthy of UK now Friends of the Museum
      2012.05.29 - Library/Misc_Euro - Added Aristo Models 868 and 968 Studio, 01068 Instructions (3rd Version). Contributed by Amin Aur, Norman, Oklahoma
      2012.05.29 - Received donations from Amin Aur of Oklahoma, and Miles Schumacher, Windsor Heights of Iowa, now Friends of the Museum
      2012.05.27 - SRM_Home and Fund Raiser - Added souvenier shop for t-shirts/mugs, etc with ISRM logo.
      2012.05.26 - SR_Terms/Encyclopedia - Added Slide Rule Tuning definition
      2012.05.26 - Demonstration Slide rules - Added pictures of "Dr. Dalai"'s demo slide rule collection hanging in his office.The best I've seen.
      2012.05.26 - Received donation from Michael Andersson of Sweden now Friends of the Museum
      2012.05.25 - Received donation from James Price of Washington now Friends of the Museum
      . 2012.05.24 - Received donation from Michael P. Hass of Virginia now Friends of the Museum
      2012.05.22 - Received donation from Kent Berglund, Giuseppe Bianchi of Italy. now Friends of the Museum
      2012.05.21 - Received donation from Giovanni Mai of Italy, Paul Anderson, Miniature Memento, Stephen Treadwell, and Marion Moon of california; now Friends of the Museum
      2012.05.23 - Received donation from Ingo Elsen of Germany, now a Friend of the Museum
      2012.05.15 - Library - disabled files access, but left thumbnails, to see if anyone would notice and donate $. I might disable the SR files as well. Lets see what happens. We need 200 Friends to donate $10 each to cover the immediate needs.
      2012.05.14 - Paypal - Added donation button to all galleries and donation request to home and friends, library pages,
      2012.05.14 - WhosWho - Added photo of John Pickett, son of founder Ross Pickett of P&E
      2012.05.13 - Friends of ISRM - begun to build the Friends list from the galleries and other records
      2012.05.13 - Received donation from Carl Wyant, now a Friend of the Museum
      2012.05.13 - Calculators - Too much to tell, updated the page with the latest acquisitions and research on slide rule calculators.
      2012.05.13 - Pickett - Corrects scale set on N4-T. Fixed radical symbol on IE9 using face="Arial" in font.
      2012.05.12 - Media - Did a taped radio interview (Jeff Emtman) on the exhibit at the Boulder Public Library and the history of slide rules
      2012.05.08 - Library/British - Added Technical Sales Emblem Series 1071 Commercial Instructions. All donated by Richard Davis., Las Vegas, Nevada
      2012.05.08 - MiscEuro - Added TEKNOR No.181 Gymnasium and DIWA 611 Electro Pocket. All donated by Richard Davis., Las Vegas, Nevada
      2012.05.08 - British - Added(Replaced) Technical Sales Emblem Series 1051, 1053, 1071, 1081, 1091. All donated by Richard Davis., Las Vegas, Nevada
      2012.05.07 - SR_Menu added Hellerman and Helix brands to list
      2012.05.07 - Library/British - Added Helix Regal Series Instructions. Modified scan originally from Tina Cordon
      2012.05.02 - British - Misc British Added Hellerman No. 51, and Helix Regal A102S. Both new catagories. Acquired out of England with Electronic Calculators
      2012.05.02 - British - Added Thornton AD060 (Archive ref) and Unique Mannhiem (OEM Lietz 2975). Donated by Richard Davis., Las Vegas, Nevada
      2012.05.02 - MiscEuro - Added Logarex 27203 Darmstadt Pocket and 27601-I Studio. Donated by Richard Davis, Las Vegas, NV.
      2012.05.02 - MiscUSA - Added Lietz 2975 (Unique Mannhiem OEM ). Donated by Richard Davis., Las Vegas, Nevada
      2012.05.02 - MiscUSA - Added Lietz 2971-P USA (made by Bruning) and Lietz 2975 (made by Unique). Donated by Richard Davis, Las Vegas, NV.
      2012.05.02 - MiscJapan - Added ALCO #578 Pocket slide rule in retail ($1.00) Package. Belonged to Ruth Moira Kane, Donated in her memory by daughter Ann Kilby, Kingston, Washington
      2012.05.02 - Lawrence - Repaired broken image links
      2012.05.06 - Post - Added(Replaced) 2 models of 1446-D Student (S502) Owned by Wallace E. Kane Donated by step-daughter Ann Kilby, Kingston, Washington
      2012.05.06 - K&E - Added 4081-5 20inch Duplex Log Log Decitrig Owned by Wallace E. Kane, and N4058W Beginner's SR Donated by step-daughter Ann Kilby, Kingston, Washington
      2012.05.06.01 - Ricoh - Added(Replaced) Lutz 252 U.S. Belonged to Ruth Moira Kane, Donated in her memory by daughter Ann Kilby, Kingston, Washington
      2012.05.06 - Circular - Added(Replaced) Circular Dial Rule 101-C (C15). Donated by Ann Kilby, Kingston, Washington
      2012.05.06 - Pickett - Added(Replaced) Circular Dial Rule 101-C (C15). Donated by Ann Kilby, Kingston, Washington
      2012.05.06.02 - Dietzgen - Added(Replaced) 1757 Primatrig (S112) slide rule. Donated by Scott Reynolds (Vintage Calculators inc.), Helmut, California.
      2012.05.06 - British - Added(Replaced) Jakar 523A LL Pocket (P237), Jakar 22 Pocket and Jakar 33 Duplex. Donated by Richard Davis., Las Vegas, Nevada
      2012.05.05 - Received gifts of slide rules from Richard Davis, Las Vegas, Nevada
      • 12.05.05.01 Jakar 523A LL Pocket
      • 12.05.05.02 Jakar 22 Pocket
      • 12.05.05.03 Jakar 33 Duplex
      • M254 Jakar Instructions for models 11,22,29,33,55,66,77,88,99
      • M255 Technical Sales Emblem Series Instructions
      2012.05.04 - Received donation of K&E K12-Prep and Dietzgen 1757 Primatrig slide rules. Donated by Scott Reynolds (Vintage Calculators inc.), Helmut, California.
      2012.05.03 - MiscEuro - Added/(Replaced) Logarex 27403-X Darmstadt (S569) donated by Richard Davis, Las Vegas, Nevada
      2012.05.02 - Received Donation of 8 slide rules and manuals from Ann Kilby (hers and her parents Wallace and Ruth Kane), Kingston, Washington. A family of scientists.
      • 12.05.02.01 Lutz NO. 252, dc MS-4 U.S., belonged to Ann's Mother: Ruth Moira Kane (1921-2007). Used in graduate school, Career in Theoretical Physics
      • 12.05.02.05 ALCO #578 Basic Mannheim, belonged to Ann's Mother: Ruth Moira Kane (1921-2007). Used in graduate school, Career in Theoretical Physics
      • 12.05.02.02 K&E 4081-5 sn630198 with green leather case and manual, belonging to Ann's Step-Father: Wallace E. Kane. Used in graduate school and career in Theoretical Physics
      • 12.05.02.03 K&E 4058W with red Post case, belonging to Ann Kilby. Used in high school and early college (biology). career in Healing arts
      • 12.05.02.04 Pickett 101-C with case and manual, belonging to Ann Kilby. Used in high school and early college (biology). career in Healing arts
      • 12.05.02.06 Post 1446-D Student, belonging to Ann's Step-Father: Wallace E. Kane. Used in under-grad school. Career in Theoretical Physics
      • 12.05.02.07 Post 1446-D Student, belonging to Ann's Step-Father: Wallace E. Kane. Used in under-grad school. Career in Theoretical Physics
      • Manual - K&E No. 4081
      • Manual - K&E No. 68-2047, old 4187S
      • Manual - K&E Horse Sense
      • Manual - Lawrence
      • Manual - Pedigree
      • Manual - Pickett 101-C
      2012.05.01 - Display - The 'Slide Rule'Calculator exhibit was installed in the Boulder Public Library.
      2012.04.29.01 - Electronika MK33 Calculator, Donated by Scott Reynolds..others to list
      2012.04.28 - MiscEuro - Added note on Fedra LogLog about Skip Zogopoulos, Exeter, NH being a donor of these to the ISRM slide rule loaner program.
      2012.04.27.01 - Faber - Added(Replaced) 2/83N Novo Duplex (S122) donated by Rod Vance, Victoria, Australia
      2012.04.25 - MiscUSA - Added Honeywell Metric Converter, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      2012.04.25 - MiscEuro - Added Logarex 27602, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      2012.04.25 - Circular - added Concise/Sama & Etana CTCS-552 with American Oil logo, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      2012.04.25 - Received donation of slide rules fom Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      • 12.04.25.03 Honeywell Metric Converter, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      • 12.04.25.01 Logarex 27602, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      • 12.04.25.02 Concise/Sama & Etana CTCS-552 with American Oil logo, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
      2012.04.23.01 - K&E - Added(Replaced) 4080-3 (S015) Log Log Duplex Trig sn422987 c1947, purchased from shopgoodwill.com
      2012.04.23.02 - Hemmi Added 153 for Elec. Eng. donated by Jim Jeffery, Deleted 153 (S324) for Elec. Eng. and 251 (S034) for Mech. Eng. as these were duplicates.
      2012.04.22 - ISRC - Added 2012 RST championship with picture of winners. Kraemer, Rudowski and Luetjens
      2012.04.19 - SR_Links - Added Marksmath.com (Mark Armbrust Collection, Boulder, Colorado)
      2012.04.07 - Ephemera - Added 1966 photo of Yokagawa-Hewlett-Packard 4260a Design Team and 5 ads for Popular Science 1942-1971
      2012.04.06 - Calculators - TOO MANY CHANGES TO LIST! - Getting ready for an exhibit at the Boulder Public Library in May
      2012.03.23 - Ephemera - Added 1966 photo of West Point graduate John T. Reed using a slide rule as a cadet
      2012.03.23 - SR_Terms/Encyclopedia - Updated USAF Academy entry with chronology of math instruments used by different classes ('59-'90) and to the USN Academy
      2012.03.22 - Library/MiscEuro - Added 989 Complex Slide Rule, 989 Komplex-Rechenplatte Instructions in German and in English, donated by Henry Benoit, Kingston, Ontario, Canada
      2012.03.21 - Lawrence - Added 10-B and Eng. Inst. 10-B, donated by Henry Benoit, Kingston, Ontario, Canada
      2012.03.21 - Aristo - Added 0970 and 870 multilog, donated by Henry Benoit, Kingston, Ontario, Canada
      2012.03.21 - Faber - Added 989 Complex Slide Rule, 989 Komplex-Rechenplatte, donated by Henry Benoit, Kingston, Ontario, Canada
      2012.03.21 - Received donation of five slide rules from Henry Benoit, Kingston, Ontario, Canada used in his career (with personal photo and bio).
      • 12.03.21.01 - Faber Castell 989 Complex Slide Rule, 989 Komplex-Rechenplatte
      • 12.03.21.02 - Aristo 870 multilog DateCode 6501 (Jan 1965)
      • 12.03.21.03 - Aristo 0970 multilog DateCode 631 (Jan 1963)
      • 12.03.21.04 - Lawrence 10-B
      • 12.03.21.05 - Engineering. Instruments 10-B
      2012.03.17 - Adders/Troncets - Added a series of factory photos of a visit to the Addiator factory in Berlin (bottom of page)
      2012.03.16 - Adders/Troncets - Added a Magic Brain and Midget adding machines
      2012.03.16.02 - K&E - Added(Replaced) N4053-5 20 inch Mannhiem sn830192 (L01) 1933-1935
      2012.03.16.01 - K&E - Added 4080-5 20 inch Log Log Duplex Trig sn632018
      2012.03.16 - SR_Library_MiscUSA - Added Charles Bruning 68-540 (old 2401) istructions
      2012.03.16.03 - MiscUSA - Added Charles Bruning 68-540 (old 2401) in retail box, w/ link to instructions
      2012.03.13 - MiscWorld - Added Tianjin 6504 Special scale Instructions By Liu Qinglin (Beijing, China) to Tinajin 6504 specimen, Contributed by Steve Treadwell
      2012.03.13 - SR_Library_Soviet (China) - Added Tianjin Squirell 6504 Special scale Instructions, Contributed by Steve Treadwell
      2012.03.15.01 - Hemmi - Added Electro, pre 1927 early model with train track scales, a Japanese copy of AW Faber 387
      2012.03.15.02 - Post - Added (Replaced) 1445P 8in (S497)
      2012.03.13 - SR_Library_Japan - Added SIC (Scientific Instruments) model 1570 and 1580 Instructions. scans by Jodie Hobson.
      2012.03.13 - Pickett - Added Model 100 and Model 6 Instructions to relevant slide rules in gallery, scan donations by Steve Treadwell.
      2012.03.13 - SR_Library_Pickett - Added Model 100 Douglas Sky rule and Model 6 Quality Control and Statistal Instructions, scan donation Steve Treadwell.
      2012.03.08 - SRM_Home - Placed promotional paragraph about the new Slide Rule Calculator Gallery.
      2012.03.02 - Received Donations of 18 Slide Rules from Richard Davis, Las Vegas and 20 Picketts to support the slide
      rule loaner program from members of the Oughtred Society that attended the West Coast Meeting in LA, Febuary, 2012.
      • 12.03.02.02 - QTY 14 Pickett 140C-T in Retail hanging Card
      • 12.03.02.01 - QTY 6 Pickett 121C-T in Retail hanging Card
      • 12.03.02.19 Unique USRC, Lietz 2975, Donated (ref 102) by Richard Davis, Las Vegas
      • 12.03.02.18 British Thornton AD060 Standard, Donated (ref 113) by Richard Davis, Las Vegas
      • 12.03.02.06 Emblem Series Tutor No.1051, NIB, Donated (ref 121) by Richard Davis, Las Vegas
      • 12.03.02.07 Emblem Series Olympic LL No.1053, NIB, Donated (ref 122) by Richard Davis, Las Vegas
      • 12.03.02.09 Emblem Series Commercial No.1071, NIB, Donated (ref 123) by Richard Davis, Las Vegas
      • 12.03.02.08 Emblem Series Techlog No.1081, NIB, Donated (ref 124) by Richard Davis, Las Vegas
      • 12.03.02.10 Emblem Series Executive No.1091, NIB, Donated (ref 124) by Richard Davis, Las Vegas
      • 12.03.02.04 Logarex Teknor Gymnasium No.1081, NIB, w/case Donated (ref 104) by Richard Davis, Las Vegas
      • 12.03.02.03 Logarex Teknor Gymnasium No.1081, Used, Donated (ref 106) by Richard Davis, Las Vegas
      • 12.03.02.15 Logarex Darmstadt 27203 Pocket, Donated (ref 103) by Richard Davis, Las Vegas
      • 12.03.02.05 Logarex Darmstadt 27403-X, Donated (ref ?) by Richard Davis, Las Vegas
      • 12.03.02.11 Logarex Studio 27607-1, Donated (ref 107) by Richard Davis, Las Vegas
      • 12.03.02.12 Jakar No.523A, Pocket, Donated (ref 108) by Richard Davis, Las Vegas
      • 12.03.02.14 Jakar No.22 Darmstadt, Pocket, Donated (ref 109) by Richard Davis, Las Vegas
      • 12.03.02.13 Jakar No.33 Duplex Log/Log, Pocket, Donated (ref 110) by Richard Davis, Las Vegas
      • 12.03.02.16 Diwa No.611 Electro, Pocket, Donated (ref 112) by Richard Davis, Las Vegas
      • 12.03.02.17 The A. Lietz CO. 2971P, Pocket, Donated (ref 101) by Richard Davis, Las Vegas
      • Jakar Instructions for No. 11,22,29,33,55,66,77,88,99, Donated (ref 111) by Richard Davis, Las Vegas
      2012.03.02 - Received Donation of "The Slide Rule" by Robert Saffold and Ann Smalley (TutorText) from John Roe, Uxbridge, MA
      2012.03.02 - SRM_Intro - Updated logo, added collage of math instruments (slide rules and calculatorsthe curator used in his career.
      2012.03.02 - Faber - Added FC TR-1, TR-2 and TR-3 Electronic Slide Rule/Calculators Hybrid
      2012.03.02 - Calculators - Added a new gallery showing 32 Electronic Slide Rule Calculators (1972-1977)
      2012.02.29 - Military - Added 5 155mm Howitzer Cannon Graphical Firing Table Slide Rules - Vietnam Era
      2012.02.27 - PocketWatch - Added banner and hyper link to Art Simon's Slide Rule Wristwatch web pages
      2012.02.24 - Received donation of 100 new Fedra slide rules for school loaner program and
      10 Pickett N500/N300-ES sets to be sold in fund raiser from Skip Zogopoulos, Exeter, NH.
      2012.02.24 - MiscWorld - Repaired broken link to Tianjin Squirell 6502
      2012.02.23 - Aerospace - Added Gareth Peach's pictures and magazine articles about Tidbinbilla, Australia and Apollo 11
      2012.02.19 - Faber-Castell - Added(Replaced) 51/91 (S101) donated by Nancy Day for William M. Day. Included Bio and picture.
      2012.02.19 - K&E - Added(Replaced) 68-1617 sn750904 (S201) donated by Nancy Day for William Bruce Day. Included Bio and picture.
      2012.02.19 - MiscUSA - Added(Replaced) C-Thru No 27 Pocket Slide Rule (P205) and Stock Yield Slide Rule. donated by Nancy Day for William Bruce Day.
      2012.02.19 - Received donation of slide rule from Nancy Day, for William Bruce Day
      • 12.02.19.01 - C-Thru No 27 Pocket Slide Rule
      • 12.02.19.02 - Stock Yield Slide Rule
      • 12.02.19.03 - K&E 68-1617 sn750904
      • 12.02.19.04 - Faber-Castell 51/91
      2011.02.19 - SRM_Home - Added pictures on righthand date-line column of African-Americans using slide rules
      2011.02.19 - SRM_Home - Rearranged home page to show a compact list of galleries and Libraries
      2011.02.15 - SR_WhosWho - Added Edward A. Straker to the gallery.
      2012.02.15 - Aerospace - Added Gareth Peach's System Temperature slide rule used in NASA
      2012.02.15 - Aerospace - Added new gallery for Aviation and Space related sliderules.
      2012.02.15 - Pickett - Added Cleveland Electrical Institute ad from 1965 Popular Sciance mag to slide rule gallery
      2012.02.14 - Ephemera - Added 12 pictures. Of special interest are some from Texas A&M,Cushing Memorial Library Archives and Michigan State.
      2012.02.14 - SR_Home - Created a Facebook Account for ISRM and provided a 'Like' link.
      2012.02.13 - Rarities - Added Stanley #15 Two Fold Joint Carpenter's rule with Gunter's slide. C1890.
      2012.02.12 - Military - Changed title to include 'Space-Race' related slide rules.
      2012.02.12.01 - MiscUSA - Added(Replaced) Carles Bruning 2401 (P055) with Westinghouse Electric Promo on reverse.
      2012.02.12.02 - Post - Added(Replaced) 1444-P (P057) with Preferred Utilities Promo on reverse.
      2012.02.10 - Ephemera - Added pictures of scenes from the 2008 movie Peggy Sue Got Married showing a slide rule.
      2012.01.10.01 - Nestler - Added No. 40 with name engraved "Martin Vauple Bremen"
      2012.01.10.02 - Dietzgen - Added(Replaced) 1732 (S319) sn536054 Maniphase Multiplex Decmal Trig LogLog
      2012.01.09 - Lawrence - Added section of Lawrence OEM rebranded slide rules found in other ISRM Galleries
      2012.01.08 - MiscUSA - Added Lawrence 10-B OEM Charvos-Roos SR-31 and Lietz 2974L. Scan by David Rance, The Netherlnds.
      2012.01.07 - Lawrence - Added scans of 30 new models of slide rules made by Lawrence from the David Rance Collection
      2012.01.03 - Nestler - Added #35 System Peter. Scan by Hubert added to Hermann's Slide Rule Catalogue
      2012.01.03.01 - New Aquisition of Fuller Cylindrical Slide rule out of the UK
      2012.01.03 - Rarities - Added J. Rabone & Sons Two Fold Joint Carpenter's rule with Gunter's slide. C1890. Nathan Zeldes Collection
      2012.01.03 - SR_WhosWho - Added Henry Coggeshall, c1677. Inventor of the Coggeshall rule and Edwin Thacher (1839-1920) inventor of the Thacher cylindrical slide rule.
      2012.01.03 - Ephemera - Added picture of Russian crew on a new AN-72 aircraft using a slide rule.
      2012.01.01 - Rarities - Added Two Fold Joint rule with Gunter's slide. C1890. (ISRM Collection).

      2011.12.30 - K&E_Standard - Added 4082-3 with F scale. Scan by BajaRon from sliderulecentral.com
      2011.12.30 - Manuals - Added M249 Aero Products Research CR-6 Computer Instructions - 32 pages PDF file.
      2011.12.30 - SR_Terms/Encyclopedia - Expanded Otis Carter Formby King entry and Added Geniac
      2011.12.30 - Circular - Added Aero Products Research CR-6 Computer, Donated by Carlee Heit, Houston, Texas.
      2011.12.29 - SR_WhosWho - Added Otis Carter Formby King, with his bio written by ancestor Susan Richards
      2011.12.29 - Manuals - Added Otis King's Patent Calculator Instructions - 8 pages PDF file
      2011.12.29 - British - Added Otis King Cylindrical Slide rule Early Model K (ebay) and Late Model K and L (HSRC).
      2011.12.29.02 - Acquired Otis King Cylindrical Slide rule Model L Scales:429 and 430. snZ2275 green cardboard box (missing top), with manual.
      2011.12.29.01 - British - Added/Replaced Otis King Cylindrical Slide rule Model K Scales:423 and 414. snV7554 Leather case
      2011.12.29 - Circular - Added Rocket Design Sliderule, Courtesy Of Paul Ceruzzi, National Air And Space Museum
      2011.12.26 - Military - Added AN-5837-1 Alititude Correction Computer. Donated by Carlee Heit, Ray Heit Collection.
      2011.12.26 - Military - Added Dalton Dead Reckoning Computer E6-B, Donated by James Weber Estate and Time Distance Computer (ebay image)(also in Circular SR gallery).
      2011.12.26 - Library/General - Added Dalton Dead Reckoning Computer E6-B, post WWII Instructions. Donated by Carlee Heit, Ray Heit Collection.
      2011.12.26 - Circular - Added Dalton Dead Reckoning Computer E6-B, post WWII. Donated by Carlee Heit, Ray Heit Collection and Time Distance Computer (ebay image).
      2011.12.23.01 - Pickett - Added 931-ES (c1959) Capitol Radio Enginneering Institute (square braces) Donated by Dan Marcotte, Rye, New hampshire.
      2011.12.23 - Ephemera - Added 9 historical photos/ads/Ephemera of people with slide rules.
      2011.12.21 - Donation - Pickett 931-ES Capitol Radio Enginneering Institute (square braces),
      K&E 4081 Slide Rule Manual and K&E Elementary Instructions Donated by Dan Marcotte, Rye, New hampshire.
      2011.12.18 - Ephemera - Added 25 historical photos of people with slide rules.
      2011.12.17 - SR_Menu - Added 'Gerber' manufacturer link to gallery.
      2011.12.17 - SR_WhosWho - Added Andreas Tabak, The Collection of Calculating Devices - TCoCD.
      2011.12.17 - MiscEuro - Added Klawun Rietz No100, No 100 Hanover, 125LL, and 31c. Picture from Andreas Tabak Collection.
      2011.12.17 - MiscEuro - Added Klawun-Meloir Rietz No100 Hanover.Picture from .
      2011.12.17 - SR_WhosWho - Added H.Joseph Gerber, inventor of the Variable Scale slide Rule.
      2011.12.16 - Emphemera - Added photo of Dr. Robert B. Abernethy using a slide rule (1963).
      2011.12.17.01 - Faber - Added 398 Electro with all-glass cursor
      2011.12.16.02 - Pickett - Added 540-T Pratt & Whitney Gas Turbine Slide Rule c1959.
      2011.12.16 - Dietzgen - Added Insert Form No. 1700-SRT/500B/PN25 with N1733 Polymath Multiplex slide rule.
      2011.12.16.01 - Dietzgen - Added(Replaced) N1733 (S401) Polymath Multiplex Decmal Trig Type Log Log.
      2011.12.16 - SR_WhosWho - Added Ovid W. Eshbach and H. Loren Thompson, co-authors of Dietzgen Instruction manuals.
      2011.12.15.01 - K&E_Specialty - Added N4096 M sn530063 20 inch Merchant's Rule
      2011.12.15.03 - Germany - Added Joe Klawun No1001/S Business Rule. Added 2 company logos to title area.
      2011.12.15.02 - Post - Added(Replaced) 1446 (S096) pre-WWII Sun Hemmi, Made in Japan.
      2011.12.14.01 - K&E_Standard - Added K&E N4053-3 sn 802716 with Magnifying Cusor U.S.Military Issue,expanded case for magnifyer.
      2011.12.14.02 - Rarities - Added Ivory Sector, c1825, Same markings as W&S Jones Sector.
      2011.12.12 - MiscBritish - Added Unique Study 300 slide rule courtesy of Ted Hume (Texas)
      2011.12.12.01 - Rarities - Added Dring & Fage Excise Officers Rule with dual slides, c 1868. Alphabetized webpage by Manufacturer.
      2011.12.11 - SR_WhosWho - Added William Hyde Jackson Wollaston - (1766-1828) United Kingdom.
      2011.12.11 - Emphemera - Added photo of Harry T. Gisborne using an early fire danger meter in 1937
      2011.12.10 - Meetings. Updated International meetings page to be more generic and more maintainable.
      2011.12.09.01 - Donation - Received 10 Unique Study 300 slide rules courtesy of Ted Hume (Texas) for use in support of the slide rule loaner program
      2011.12.08 - SR_Terms (Encyclopedia) - Added entry for Joe F. Klawun
      2011.12.03.01 - MiscUSA - Added A. Lietz Co. 2971-N Pocket slide rule made by Hemmi.
      2011.12.03 - Emphemera - Added UIL Slide Rule Medal won by Paul Tarantolo, Houston, Texas
      2011.12.02 - K&E Standard - Replaced 4092-3 sn256159 (S007) currently stored in Display Frame D3
      2011.12.02.01 - Dietzgen - Added(Replaced) 1738 (Ref Larry Kehl) Style-M Multiphase Improved Decimal Trig Type Log Log
      2011.12.02 Aristo - Added(Replaced) 903LL Aristo-Scholar dc3FX80 (A054) logo Stamped On Braces; 901 Aristo-Junior dc1S67 (S203)logo Stamped On Braces
      2011.11.23.01 - K&E Standard - Added(Replaced) N9081-3 (S159) Doric Duplex Decitrig
      2011.11.22 - Aristo - Added box images from New In Box (NIB) models 868 and 870 Pocket slide rules
      2011.11.22 - MiscWorld - Added(Replaced) Tianjin Squirrel Model 6502 (P238)
      2011.11.22 - Post - Added(Replaced) 1447 (S452) SunHemmiJapan dcCB No Post logo, 1447 (S313) dcKI Post logo on stock
      2011.11.22 - Post - Added(Replaced) 1447 (S021) HemmiJapan dcBI logo on slide, 1446 (S020) Made In Occupied Japan, 1445 (S228)
      2011.11.22 - K&E Standard - Added N4053-3 Polyphase All glass cursor, plastic blocks. Donated by Martha Prince.
      2011.11.22 - K&E Standard - Added 4080-3 (S299) Log Log Duplex Trig (replaced Howard 'Red' Sanford entry which was given to CHM).
      2011.11.22.01 - K&E Standard - Added N4080-3 S/N 470704 (S008)
      2011.11.22.02 - Pickett - Added(Replaced) Models N-500-ES (S185) Wide Cursor Radiused braces Modern Logo
      2011.11.22 - Pickett - Added(Replaced) Model N500-ES Wide Cursor Radiused braces Round Black Logo
      2011.11.22 - K&E Standard - Added 68-1318 Log Log Duplex Trig c1962, 4181-3 (S481) Plastic stock, 4081-3 c1954 with ST scale
      2011.11.21.07 - Pickett - Added Model N1010-ES with extra DI scale on back. Square braces round black logo
      2011.11.21.06 - Pickett - Added Models N901-ES Narrow cursor Square braces round black logo
      2011.11.21.05 - Pickett - Added N901-ES Wide Cursor Radiused braces round black logo
      2011.11.21.04 - Pickett - Added(Replaced) Models N901-T (S181) Square braces round black logo
      2011.11.21.03 - Pickett - Added 1010 Metal Bar Cursor Rounded Braces Triangle Logo
      2011.11.21.02 - Pickett - Added Model N1010-ES (only one DI scale) Square braces round black logo
      2011.11.21.01 - Pickett - Added Pickett N902-ES CI scale added, Radius Braces, Black Round Logo. For adoption, Replaced by 14.09.17.02
      2011.11.20 - Pickett - Added(Replaced) Model 200 c1949 w/ Alhambra, Ca address, Model 80 (S144), 1010-T (S177), and 1010-ES Square braces round blk logo.
      2011.11.20 - Sterling - Added(Replaced) model 584 White (S149), 589 Senior Red Text Slide (S150). Re-ordered listings by model number. Donated by David Sweetman
      2011.11.20 - MiscJapan - Added 2 Unknown Makers: Pocket Mannhiem with Linear scales on both edges and a Pocket Mannhiem , Fawick Airflex promo SR. Circa 1965. Donated by David Hecht
      2011.11.20 - Pickett - Added(Replaced) Model 300 c1949 (P237)(P216)(P092). Provided detail of stock machining c1949 and c1962. Donated by David Hecht
      2011.11.20 - Pickett - Added(Replaced) 200 RCA metal cursor bars, 200 (P095) Nat'l Carbon Co. Model 1006 c1949 (P203). Donated by David Hecht
      2011.11.19 - K&E - Added(Replaced) 4181-1 (P084) sn003925 A1B2 artwork Blk Scales Pocket Rule. Donated by David Hecht
      2011.11.19 - Acumath - Added(Replaced) Model 1200 (P037) pocket w/ white ends
      2011.11.18 - Relay/Ricoh - Added Lafayette F-686 Vector Log, and 99-7055 Vector Log. Rod Lovette Collection
      2011.11.18 - Faber-Castell - Added(Replaced) 67/87 Rietz (P034), 67/39 Rietz 5in, 67/39 Rietz 14mm, Donated by David Hecht
      2011.11.18.02 - Pickett - Added(Replaced) Model 160-T Made In Mexico w/Retail Box (P080),
      2011.11.18.03 - Pickett - Added(Replaced) Model 160-CT w/RetailCard
      2011.11.18.04 - Pickett - Added(Replaced) Model 160-ES w/Retail Box (P046).
      2011.11.18 - Pickett - Added(Replaced) Model 20 (P240), . Donated by David Hecht
      2011.11.18.01 - MiscEurope - Added(Replaced) Diwa model 301 Rietz (S244)
      2011.11.17.03 - Dietzgen - Add model N1725 Vector Type Log Log sn 013933
      2011.11.17.04 - Added Acu-math 400 Student Mannhiem, thin cursor, grooved stock.
      2011.11.17 - Acumath - Added(Replaced) models 400 wide stock (S140), 400 Oval Logo (S141) (Fullerton-Acu 400 (S142), 400B Oval Logo(S051)
      2011.11.17.02 - Acumath - Added(Replaced) model 400B Oval Logo(S051)
      2011.11.17.07 - Acumath - Added Models 130
      2011.11.17.06 - Acumath - Added Models 150 Oval Logo,
      2011.11.17.05 - Acumath - Added Models 500 metal braces, w/o logo,
      2011.11.17.01 - Nestler - Added Model No. 21 Darmstadt. Has cracked glass
      2011.11.17 - SR_Library/Europe - Added 801 Charvoz Roos (M246) and Nr. 89 Rietz (M247) Instructions. Donated by David Hecht
      2011.11.17 - Aristo - Added (Replaced): 801 Charvoz Roos and model 89 Rietz Pocket Rule (P066). Donated by David Hecht
      2011.11.17 - Post - Added Model 1461 Versalog II 1969 pocket and 1462H Postrig, Donated by David Hecht
      2011.11.17 - Scientific Instruments - Added (Replaced): SIC 5050 variant, Donated by David Hecht
      2011.11.17 - Relay/Ricoh - Added (Replaced): Lafayette 99-70302, Relay 602, Compass 505 (P219), Micronta 505 (P161) Donated by David Hecht
      2011.11.13 - Aristo - Added 801 Charvoz Roos (with Instructions) and replaced P066 model 89 Rietz Pocket Rule. Donated by David Hecht
      2011.11.13 - SR_Library/MiscEurope - Added 801 Charvoz Roos (with Instructions) Donated by David Hecht
      2011.11.13 - Aristo - Added 801 Charvoz Roos (with Instructions) and replaced P066 model 89 Rietz Pocket Rule. Donated by David Hecht
      2011.11.13 - Acumath - Replaced P037 Model 1200 (pocket) (given to CHM by ISRM)
      2011.11.13 - Pickett - Replaced P08 Model 160-T (Made in Mexico) and P046 Model 160-ES (both given to CHM by ISRM)
      2011.11.13.02 - Pickett - Added(Replaced) Model 61 Grey Braces V2 (P090)
      2011.11.13.01 - Pickett - Added(Replaced) Model 61 Black Braces V1 (P206)
      2011.11.13 - Relay/Ricoh - Added(Replaced) Compass Model 1018 (P119), Made in USA by Bruning, Donated by David Hecht
      2011.11.12 - Circular - Sama & Etani/Concise 600P Overhead Projector Model Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
      2011.11.12 - Pickett - Added(Replaced) N200-T Pocket Rule (P191) Sola Basic Ind. Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
      2011.11.12- K&E - Added(Replaced) 4181-1 C2D1 artwork Pocket Rule (P102) Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
      2011.11.12 - Hemmi - Added Foxboro Flow and Valve Rule. Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
      2011.11.11 - Sterling - Added(Replaced) two model 685's of new variations - Donated by David Sweetman and Model 587 (P019).
      • 11.11.11.01 - Sterling 585 Deluxe (Black Text slide - open back)
      • 11.11.11.02 - Sterling 587 - Promotional (ESNA)
      • 11.11.11.03 - Sterling 694 Decimal Trig MultiLog
      • 11.11.11.04 - Sterling 589 10" Senior red txt slide
      2011.11.11 - Donation - Received a large quantity of slide charts and and slide disks from Carlee Heit, Houston, Texas. Ray Heit Collection
      • 3 volumes of slide charts mounted in plastic 3-ring sheets
      • 11.11.11.04 Pickett N200-T
      • 11.11.11.03 K&E 4181-1
      • 11.11.11.01 Foxboro Flow And Valve Rule (Hemmi)
      • 11.11.11.05 Foxboro Flow And Valve Pocket Rule (Made in USA)
      • 11.11.11.02 Sama & Etani (Concise) 600P Overhead projector Model
      • 11.11.11.06 AN-5837-1 Alititude Correction Computer - c1943 (circular)
      • 11.11.11.07 Dalton Dead Reckoning Computer,Type E6B Commercial Version Post WWII
      • 11.11.11.08/M249 Aero Products Research CR-6 (Aviation) Computer withg Instructions
      • 11.11.11.09
      • 11.11.11.10
      • 11.11.11.11
      • 11.11.11.12
      - See more at: http://www.legacy.com/obituaries/houstonchronicle/obituary.aspx?n=raymond-anthony-heit&pid=955353#fbLoggedOut 2011.11.11 - SR_Menu - Added Nobema to Manufacturer's list
      2011.11.11 - British - Added Nobema Model No 4 Pocket Slide Rule
      2011.11.11.05 - K&E Standard - Added 4092-3 (1915-1921 with 1936 Cursor) with pat April 1, '24 markings.
      2011.11.11 - Pickett - Added 125 (Narrow Stock) and 140 (Narrow stock)
      2011.11.10.02 - K&E Specialty - Replaced S264 Model 4095-3 Merchant's Slide Rule (that was given to CHM by ISRM)
      2011.11.10.03 - Relay/Ricoh - Added Relay 252
      2011.11.10 - Pickett - Added 120-T w/Retail Box end scan. Replaced S301 (that was given to CHM by ISRM)
      2011.11.10.01 - Sterling - Added Sterling (685) red text slide - solid back
      2011.11.08 - Sterling - Added(Replaced) 594 variant, model 594 (S155) (that was given to CHM by ISRM) donation by David Sweetman
      2011.11.08 - Dietzgen - replaced model 1767 (S111) (that was given to CHM by ISRM) donation by David Sweetman
      2011.11.07.01 - K&E - Added 4092-3 S/N 515790 (1937) with new improved cursor.
      2011.11.07 - K&E Standard - Added 68-1892 K-12
      2011.11.07 - Emphemera - Added Ole Jorgensen Sliderule Scale Pencil Cup and Photo of Slide Rule and Transistor (found on Ebay)
      2011.11.07 - SR_Library/Japan - Added Hemmi P452 Instructions. Scan donated by John Oakhill (Australia)
      2011.11.07 - SR_Library/K&E - Added inserts from Duplex decitrig set. 'Horse Sense' by Don Herold and 'Care of Duplex SR'
      2011.11.06 - K&E - Added catalog pages (courtesy of McCoy's K&E Catalogs) on 1936 Replacement cursor on 4053-3 specimen
      2011.11.06 - K&E - Replaced several 4081-3 and 4092-3 (that were given to CHM by ISRM) with physical specimens donated by Martha Prince
      2011.11.06 - K&E - Replaced several 4053-3 in gallery (that were given to CHM by ISRM) with physical specimens donated by Martha Prince
      2011.11.06.01 - Received 4081-3 sn156280 with SRT scale 1955, donated by Martha Prince. Duplicate of sn2266 10.03.01.01 will be for adoption.
      2011.11.06 - Acumath - Added 1240 Pocket slide rule in Retail Box
      2011.11.06 - Pickett - Added 120-ES Retail Box end scan
      2011.11.06 - Emphemera - Added three Lawrence SR related items from David Rance (UK)
      2011.11.06 - K&E - Replaced 4054 in gallery (that were given to CHM by ISRM) with physical specimen.
      2011.11.05 - Lawrence - Added Lawrence Engineering Services 10-B with Magnifying Cursor
      2011.11.05.01 - K&E - Added 4088-3 no S/n, no B scale, 1915-1921 with 1936 Improved Cursor, Previous Owner: Sheldon Hart
      2011.11.05 - People w/SR's - Added five new pictures, 2 from movies and 3 from Nasa Ames.
      2011.11.04.01 - K&E - Added K&E 4054 S/N 291745 c1944-1955
      2011.11.03 - MiscBritish - Added A.G. Thornton V.P.15, scans by John Sykes (UK)
      2011.11.02 - Aristo - Added 0968 Studio, Version 2B, scans and photo by John Sykes (UK)
      2011.11.02 - MiscBritish - Added Blundell-Luton P10 with Photo of Brailsford Sykes and Unique five-ten, scans by John Sykes (UK)
      2011.11.02 - Home/Ephemera - added MIT Slide Rule Cake for OS 20th Anniversery.
      2011.11.02 - Faber - Added Verlag Chemie Chemistry Slide Rule. Included link to instructions at Ron Maley's site (UK).
      2011.10.30 - K&E - replaced scan of S045 4058W (CHM) w/ 4058W donated by David Hecht.
      2011.10.30 - Ricoh/Micronta - Mirrored Micronta (Nestler) 14/52 to this gallery as this has the majority of known Microntas
      2011.10.30.02 - Post - Added Post 1452W Universal - date code LA (Jan 1961)
      2011.10.30.01 - K&E - Added 4088-3 SN 406555, 1933-34 All glass cursor, flanged blocks
      2011.10.30 - K&E - Added 4053-3 SN 917, 1915 All glass cursor, metal blocks, Donated by Martha H. Prince (replacement)
      2011.10.29 - Links - Added Tina's Page Tina Cordon Collection
      2011.10.29 - Who's Who - Added Tina Cordon, a Geophysical Logging Engineer with a well documented collection.
      2011.10.28 - Dietzgen - Acquired 1745 U.S.M.C with Magnifying cursor,
      2011.10.28 - K&E - Added new acquisition of 20" K&E 4078 dated 1900-1903 (W. Cox Patent 1891) with brass indicator (chisel cursor) slide rule
      2011.10.26 - Faber - Added 2/82, donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
      2011.10.26 - Aristo - Added D&P System Rietz and 867U, donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
      2011.10.26 - Received donation of slide rules belonging to Roman Russek. Donated by Shiela Russek, Toronto, Canada
      • 11.10.26.01 - Aristo 867U Darmstadt - dc 2LA06 (1970)
      • 11.10.26.02 - Dennert & Pape System Rietz - c1921-1937
      • 11.10.26.03 - Faber Castell 2/82
      2011.10.26 - MiscBritish - Added Unique Electical donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
      2011.10.25 - MiscEuro - Added two CURTA Model II images from The CURTA Page
      2011.10.25 - MiscEuro - Added CURTA calculator catagory with the contribution of Ward Anthony's CURTA.
      2011.10.25 - Who'sWho - Added Curt Herzstark (1902-1988), the inventor of the CURTA calculator.
      2011.10.25 - Ephemera - Added Tie Clasp Donated by Russell Anthony and 2011 Auburn University Decal donated by Amin Aur
      2011.10.25 - Donation from Russ Anthony of specimens belonging to his father Ward Anthony
      • 11.10.25.01 - Curta Calculator
      • 11.10.25.02 - Picket Model 1006
      • 11.10.25.03 - Slide Rule Tie Clasp
      • 12.07.18.01 - Sterling 651 Metric Convertor
      2011.10.23 - SR Library - Pickett - Added Model 23 Real Estate Slide Rule Instructions. Scan donated by Ron Kuc.
      2011.10.23 - Pickett - Added Model 23 Real Estate Slide Rule and Instructions. Donated by Ron Kuc.
      2011.10.23 - SlideCharts - Added Chord Board Slide Rule designed by Martin H. Samuel and donated to ISRM.
      2011.09.14 - Who'sWho - Added Tom Martin (UK) and Dr. Sam Friedman (USA). Expanded Rudowski, Barnes, Otnes, van Riet and Wyman bios.
      2011.08.29 - Received Donation of two Pickett 120ES for school loaner program by Alan D. Barbour, Fresno, CA
      • Pickett 120-Es w/ sleeve, retail pkg and manual - Replace S145 to ISRM
      • Pickett 120-ES w/ sleeve to SRLP
      2011.08.28 - Post - added 2 slide rules donated by Enn Veskimets of Lutherville, Maryland
      • 11.08.28.01 - Versalog 1460 No S/N, Date code DC - September 1952
      • 11.08.28.02 - Versalog 1461 Date code HK - November 1957
      2011.08.23 - Pickett - Replaced Model N3-ES Power Log Exponential Slide Rule with Donation by John L. Crawley, III, Newport News, Virginia
      2011.08.28.01 - MiscUSA - Added Charles Bruning 2460 Student Slide Rule
      2011.08.17 - Rarities - Added Aston & Mander 1915 Artillery rule, Clay Castleberry Collection
      2011.08.16.01 - Sterling - Added owner background to Sterling pocket model 587 Donated by Ron Pearce, of Littleton, Colorado belonging to his father, Finley Carlyle Pearce (1915-1998)
      2011.07.21 - SR Dates - Added Fowler Timeline
      2011.07.21 - Ephemera - Added 1930 photo of German Merchants using Nestler Cylindrical Slide Rule; and Red Pencil Cup
      2011.07.21 - Demonstration SR - Added Faber Castell 315/83N Novo Duplex Demonstration SR (Located At Powerhouse Museum).
      2011.07.14 - Pocket Watch - Added FC Calcuigraphe, HC Calculigraphe, Meyrat & Perdeizet, Mechanical Engineer, KL-1, scans from Clay Castleberry
      2011.07.07 - Who'sWho - Added Gottfried Wilhelm von Leibnitz (1646-1716) and John W. Nystrom (1825-1885)
      2011.06.26 - Military - Repaired umlates to be more compatible to most browsers. Let me know if you see a problem.
      2011.06.25 - Glossary - Expanded Jiro Hemmi data, added Hisashi Okura and Maso Bamboo entries.
      2011.06.25 - SR Dates - Corrections and slight additions to Hemmi timeline.
      2011.06.25 - Who'sWho - Added biography to Jiro Hemmi and added Hisashi Okura, (need photo) and Takeshi Okura to gallery.
      2011.06.23 - MiscUSA - Added Arthur Brown & Bro's.Slide Rule.
      2011.06.23 - Australia - Added C.O. Browne Long scale circular slide rule, photo by John Wolff
      2011.06.23 - Addiator/Troncets - Added/corrected gallery description and historical background.
      2011.06.23 - Menu - Renamed Mech Adders Gallery to Addiators/Troncets.
      2011.06.22 - SlideCharts - Added links to current manufacturers of slide charts and wheel charts.
      2011.06.21 - Menu - Added Australian Griffin, SCA, Ben Jordan, and Yabsley
      2011.06.21 - SlideCharts - Added Circular slide rule from Slide Charts of Australia (SCA), Cyril Catt
      2011.06.21 - Circular - Added two slide rule scans provided by Cyril Catt, Australia
      2011.06.21 - Auatralia - Added seven (7) slide rule scans provided by Cyril Catt, Australia
      2011.06.19 - Aristo - Added four slide rules archived from Sphere Research website and HSRC gallery.
      2011.06.19 - People w/SR's - Added two (2) pictures, one from the Movie Sky Captain, World of Tommorow
      2011.06.19 - ISRM Intro - Added clarification to image prefix codes
      2011.06.15 - Relay/Ricoh - Modified Lafayette 99-7102 Vectorlog (Same as F-686) listing.
      2011.06.13 - Pickett - Added Model 598 "R" Parameter Slide Rule. Scan by Richard Davis
      2011.06.05 - Menu - Added ALKU and Ransley, W. links.
      2011.06.05 - MiscEuro - added ALKU Rechenschieber scan donated by Nathan Zeldes, Israel
      2011.06.05 - People w/SRs - added two (2) new photos/ephemera, one is a decal from Auburn University from Amin Aur
      2011.06.04 - Rarities - Added W. Ransley sector slide rule scan by Nathan Zeldes, Israel
      2011.06.03 - Aristo - Added photos of Aristo 203 projector slide rule.
      2011.06.01 - Sterling - Added repaired Sterling 584 which belong to ISRM Curator's parents, Les and Susan Konshak.
      2011.05.29 - Who's Who - Inducted the late Wayne E. Feely, known for his expertise in Cylindrical SRs.
      2011.05.27 - Australian - Added ARCUS slide rule, scan by Cyril Catt
      2011.05.25 - Who's Who - Rearranged recipients into two columns. Inducted Bryan Purcell.
      2011.05.25 - Menu - Added ISRM What's New webpage, to let users know where to look.
      2011.05.25 - Menu - Added Towl, Forrest link.
      2011.05.24 - Rarities - Added Forrest M. Towl Pipe line slide rule.
      2011.05.16 - Circular - Added Gilson Midget, Donated by Ric Turley im memory of Glenn Wood
      2011.05.16 - SlideCharts - Added Piping Selector, Donated by Manual Gimeniz
      2011.05.15 - Updated Bernard Boykin entry and photo. He passed on May 12.
      2011.05.14 - People w/SRs - added 4 new photos/ephemera.
      2011.05.11 - Added picture to David Reub's entry.
      2011.05.15 - Search -Added new search engine by JRank. The last one would never update the index.
      2011.05.14 - Pickett - Added two models of Dow Chemical Pipe Flow slide rules models 1060 and 1060-ES with picture/bio of original owner, Father of Rick Mandrell.
      2011.05.14 - Received donation of Pickett 1060-ES Dow Chemical Pipe Flow slide rule. Donated to ISRM by Rick Mandrell
      2011.05.24 - Circular - Added Graphic Chemical Predictor, donated by Ginger Even, in memory of Father, Norman D. Fulton Jr.
      2011.05.16.01 - Received donation of Gilson Midget 1932-1936 belonged to Roy Glenn Wood, provided by Ric Turley, Pinecliff, Colorado.
      2011.04.16 - Who's Who - Inducted Lieb Stern to gallery.
      2011.04.15 - Library-Soviet - Added Lieb Stern Compressor manual (Crylic).
      2011.04.15 - MiscUSSR - Added Lieb Stern Compressor Slide rule under LFAI factory.
      2011.04.14 - Library-Europe/SA - Added Archimedes and Plastograf (Portugese) manual scans, Donated by Joao Gabbardo, Brazil.
      2011.04.13 - MiscWorld - Added Several Archimedes and Plastograph slide rule scans, Donated by Joao Gabbardo, Brazil.
      2011.04.09.01 - Pickett - Model 600ES owned by Andy Keller (1942-2010) donated by his wife. Added variation to gallery.
      2011.03.23 - Donation - A variety of 19 basic Slide rules to support Student Loan program from David Sweetman
      • 11.03.23.01 - Lawrence 10-B with Magnifying Cursor in sleeve painted back - add to isrm
      • 11.03.23.02 - Dietzgen 1767 National - replace in ISRM
      • 11.03.23.03 - Engineering Inst 250-V in blue sleeve - add to isrm
      • Sterling 594 Decimal Trig Log Log - for Adoption
      • Sterling 594 Decimal Trig Log Log - add to ISRM
      • Sterling 685 Red/Black text
      • Sterling 584 Red/Black Text, In clear plastic hard sleeve - US Navy - Belonged to Walter T. Irwin -Add to ISRM
      • Sterling 584 Black Text - for Adoption
      • Sterling 584 Black Text - yellowed for Adoption
      • Sterling 584 Black Text - replace in isrm
      • Sterling Pocket 587 plain - replace in ISRM
      • Sterling Pocket 587 promo - replace in ISRM
      • Sterling Pocket 587 w/ sleeve and instructions - replace in ISRM
      • Pickett Model 3 w/o cursor Very bad
      • Pickett 120-ES wide in sleeve - for Adoption
      • Pickett 120-T wide in sleeve added retail box - replace in ISRM
      • Pickett 120 trainer in brown sleeve (Black braces) - for Adoption
      • Acumath 400 - to Loaner
      • Acumath 400 - to Loaner
      2011.02.07 - SR_Library/Japan - Added Hemmi Mannheim Instructions, Models 30, 32, 34, 34RK, 40RK and 50W. Scan donatred by Alessandro Castellani, Italy
      2011.02.28 - Donation - Bonney Forge Piping Sector disk from Manual Gimeniz,
      2011.02.14.01 - Donation - Acu-math 400,Simplex Trig, round corners, no Logo c1968

      2010.12.12 - Donation of several slide rules gifted by Andrew Keller, Longmont, Colorado
      • 10.12.12.01 - Teledyne Post 1426 Business (Hemmi P452)
      • 10.12.12.02 - Pickett N4-ES Vector-Type Log Log 1960-62 (may be tagged as ISRM 12.01.21.01)
      • 10.12.12.03 - Pickett N-515-T Electronic CIE Logo
      • 10.12.12.04 - Pickett N-531-ES Capitol Radio Engineering Institute
      • 10.12.12.05 - Pickett N902-T Simplex Trig
      2010.10.23.01 - Pickett - Added 8-T McGann Density Computer.
      2010.09.15.02 - Circular - Jeppesen Computer Model R-1. Gift of James Robert Weber Estate.
      2010.09.15.01 - Circular - Dalton Dead Reckoning Computer, Type E6B AN-5835-1 Military Version cWWII. Gift of James Robert Weber Estate.
      2010.09.14.02 - Circular - Compass Midget (1931, 1936) - 10.2cm dia Donated by David Viscusi, Carlsbad, California
      2010.09.14.01 - Ricoh -Lafayette F341 Duplex Log Log Trig Donated by Ed Millis, Dallas, TX
      2010.09.13.02 - Pickett and Circular - Added Pickett 101-C Donated by Mike Medlock, Greenwood, Indiana
      2010.09.13.01 - Hemmi - Added "Byoutou," 1944 slide rule, owned and donated by Dr. Di Chen, Physicist, Minnisota
      2010.09.12 - Donation of slide rules from Robert Weber Estate. Gift of Terry Cook. Administrator
      • 10.09.12.01 - Post 1462 Note: Metal Ends
      • 10.09.12.02 - Dalton dead Reconing Computer
      2010.09.09.01 - Richardson - SR donation by Bill Weinman.Eugene, Oregon
      2010.08.20 - Donation - Hemmi Electrical SR, Dr. Di Chen, Physicist, Minnisota
      2010.06.20 - Donation - Oughtred Society Slide Rule Reference Manual from Clark McCoy, Oughtred Society.
      2010.05.10.01 - Donation of Pickett N1010-ES by Al White Colorado. Al used this while working at Bendix Corp in Teterboro, New Jersey in their drafting department. 1964-1972.
      2010.03.01 - Donation - A variety of 9 Slide rules/slide charts from Robert E. Eaton, Univ CO, Boulder.
      • 10.03.01.01 - K&E 4092-3 sn526892 Good, markings on stock, complete sleeve w/markings - Replaced Cursor
      • 10.03.01.02 - K&E 4100 Stadia Slide Rule
      • 10.03.01.03 - Pickett N500-ES HI LogLog Round Yellow logo. Slide Rule w/manual, Favorite Slide rule of Robert E. Eaton
      • 10.03.01.04 - American Airlines Navigational Computer Type "B", Favorite Slide rule of Charles H. Eaton
      • 10.03.01.05 - Concise Science Tables and Slide Rule - US Govt.
      • 10.03.01.06 - Whitehead Holding Pattern Computer
      • 10.03.01.07 - Post 4161 Pocket Versalog Slide Rule
      • 10.03.01.08 - Fosdick Drilling Calculator Slide chart
      • 10.03.01.09 - Metrics Made Easy Slide chart
      2010.03.01 - Donation - 23 K&E 4053 7 K&E 4081 Slide rules from Martha H. Prince, Tuscon, AZ. Part of John prince Collection.
      • 10.03.01.01 - 4081-3 sn266 Excellent, box, sleeve, brochure "Horse Sense", no markings except price $25.50 on box
      • 10.03.01.02 - 4081-3 sn195398 Good, Replacement for S006, name on sleeve flap to ISRM
      • 10.03.01.03 - 4081-3 sn365785 1948, Replacement for S005 to ISRM
      • 10.03.01.04 - 4053-3 SN 741, 1913 Alum frame cursor,Very Good, Cdbd sleeve Add to to ISRM
      • 10.03.01.05 - 4053-3 SN 267, 1914 All glass cursor(reman), metal blocks, Very Good, Leather sleeve (no Flap), 'Leo.Frank 1914' in well on back of stock, Add to to display
      • 10.03.01.06 - 4053-3 SN 801, 1915 All glass cursor(chipped), metal blocks, Very Good, Cdbd sleeve Add to to ISRM
      • 10.03.01.07 - 4053-3 SN 917, 1915 All glass cursor(glass repaired), metal blocks, Very Good, Leather sleeve (no Flap) Added to ISRM K&E Gallery
      • 10.03.01.08 - 4053-3 SN 59, 1916 All glass cursor, plastic support, Excellent, No markings, Good Leather sleeve w/flap, Add to For Display
      • 10.03.01.09 - 4053-3 SN 476, 1922 All glass cursor, plastic support, Used glass from sn16. To ISRM.
      • 10.03.01.10 - 4053-3 SN 44, 1922 w/1936 replacement improved cursor. Excellent. No Markings. Leather sleeve missing flap. To ISRM
      • 10.03.01.11 - 4053-3, Production #317, 1915 (the only year with the metal cursor bars) To ISRM
      • 10.03.01.12 - 4053-3 SN 545, 1916 All glass cursor, plastic support, Fair Case, Name 'Rand'on back of stock
      • 10.03.01.13 - K&E N4053-3 S/N 920438 c1916-1933
      • 10.03.01.14 - K&E N4053-3 S/N 178042 c1933-1935
      2010.02.10 - MiscJapan - Added Royal 1091, scan provided by Phillip Rodley of New Zealand.

      2009.12.09.01 - Received donation of Nestler Rietz S, OEM Made by Uchida Yoko Co., Tokyo, Japan. Donated by Goichi Iida of Uchida Yoko Co., Tokyo, Japan.
      2009.02.01.01 - Circular - Air Force Type MB-2A Air Navigation Computer. Donated by Jason McHenry, Tucson, Arizona
      2009.11.16.02 - Concise - Added Sama & Etani/Concise CTCS-552 Slide Rule - Copyright 1967 Donated by Jason A. McHenry, Tucson, Arizona
      2009.11.16.01 - Concise - Added Sama & Etani/Concise EE-112 Reactance Slide Rule - Copyright 1966 Donated by Jason A. McHenry, Tucson, Arizona
      2009.10.30.01 - Acquired and posted Charvos Roos PSR-101D (W.J. Boos patent)
      2009.10.27.02 - Added(Replaced) Pickett 120 Trainer and Pickett catalog sheets.
      2009.10.27.01 - K&E - N4083-03 owned by Vern Estes, founder of Estes Rockets. Canyon City, Colorado
      2009.10.23.01 - Pickett - Received Donation of Picket N902-ES from Roberta Rosty, Saddlebrook, New Jersy
      2009.10.21 - Received donation of slide rule collection belonging to Martin C. Jensen of Redlands, California. Added to Who's Who Gallery
      • 09.10.21.01 - Pickett N4-T Vector Type Log Log, with Round braces and metal cursor bars
      • 09.10.21.02 - Aristo Rietz 89 Pocket Rule
      • 09.10.21.03 - Pickett Microline 160-T Pocket Rule
      • 09.10.21.04 - Pickett N800-T Log Log Speed Rule
      • 09.10.21.05 - Slide Chart Kemet Reactance Calculator Union Carbide. Cleveland, Ohio
      • 09.10.21.06 - Slide Chart Delco-Remy QC S-Q-C-Lator General Motors Corp.
      • 09.10.21.07 - Slide Chart Vitramon Reliability Calculator Vitramon Inc.
      • 09.10.21.08 - Slide Chart Mallory Capacitor Calculator Mallory Capacitor Co.,
      • 09.10.21.09 - T & T Fast Calculator, Circular slide rule, with instructions
      • 09.10.21.10 - General Electric - Defense Electronics Division, Circular slide rule, with instructions
      • 09.10.21.11 - Concise 28N Motorola Semiconductors, Circular slide rule, with instructions
      2009.04.24 - Received donation of slide rules from Jürgen Nestler in Germany. Many NOS from the factory which closed in 1972
      • 09.04.24.01 - Nestler_23R_v1
      • 09.04.24.02 - Nestler_23R_v2
      • 09.04.24.03 - Nestler_Beta_0252_dc10-69
      • 09.04.24.04 - Nestler_Darmstadt_0210_dc2-75
      • 09.04.24.05 - Nestler_Darmstadt_0218_dc166
      • 09.04.24.06 - Nestler_Electro_0370_dc175
      • 09.04.24.07 - Nestler_EleMath-LogLog
      • 09.04.24.08 - Nestler_Hanseat_0408
      • 09.04.24.09 - Nestler_Mechanica_0260
      • 09.04.24.10 - Nestler_PolyMath-Duplex
      • 09.04.24.11 - Nestler_SystemJAKOB_0439_dc2-74
      • 09.04.24.12 - Nestler_0320_Oil-Rule
      • 09.04.24.13 - Nestler_No0215_Darmstadt
      • 09.04.24.14 - Nestler_EleMath RS Duplex
      2009.03.24.01 - Added Alco #305 Basic Manheim, made in Japan. in its retail package
      . 2009.02.28.02 - United States - Added Lietz 3050N made by Charvoz Roos
      2009.02.28.01 - Germany - Added Reiss 3201 Rietz-Spezial.
      2009.02.01.01 - Circular - Safetech E6-B Flight Computer Model FDF-60. Owner: Mike Konshak
      2009.01.13 - Hemmi - Added pre-1940 Hemmi manufacturing process web page, translated by Atsushi Tomozawa, Japan.
      2009.01.20 - Hemmi - Added Hughes-Owens 1768C dcPA, donated by David Hecht Collection
      2009.01.12 - Donation - Received a generous number of slide rules from the David Hecht Collection. We gave David a rare Pickett as a gift
      • 09.01.12.01 - K&E N4088-5 snX6623X New improved cursor c1940-1955
      • 09.01.12.02 - (Ricoh) Compass 1321 PS-4
      • 09.01.12.03 - Compass 1018
      • 09.01.12.04 - Compass 505 (Date Code K.K-4
      • 09.01.12.05 - Alvin 222P X-Act
      • 09.01.12.06 - AA SR815 dcJK-4 (1961)
      • 09.01.12.07 - Engineers No.1050 dc KK-4 (1960)
      • 09.01.12.08 - Engineers No.1500 Duplex Decitrig Log/Log dcLS-4 (1963)
      • 09.01.12.09 - Jason 802 Decitrig Log/Log dcLS-4 (1963)
      • 09.01.12.10 - Lafayette F341 Duplex Log Log Decitrig
      • 09.01.12.11 - Lafayette 99-70302 (Date Code US-3)
      • 09.01.12.12 - Lafayette 99-7031 Duplex Decitrig Log/Log dcNS-2
      • 09.01.12.13 - Lafayette 99-70310 Duplex Decitrig Log/Log dcNS-2
      • 09.01.12.14 - Lutz 252 U.S.
      • 09.01.12.15 - Micronta (Nestler) 14/52
      • 09.01.12.16 - Micronta 157 Electrical Duplex Vectorlogdc dcJ.K-4
      • 09.01.12.17 - Compass 505 (Date Code H.K-2)
      • 09.01.12.18 - Olson TL-373 (Relay 150) dc JK-4 (1961)
      • 09.01.12.19 - Relay 150 Log-Log Decitrig dcB.K-4
      • 09.01.12.20 - Relay 153 Decitrig dc HS-2
      • 09.01.12.21 - Relay 550 dcBS-2 - Open Duplex
      • 09.01.12.22 - Lafayette_99-7032 (No Date Code)
      • 09.01.12.23 - Relay DT-1015 Trig
      • 09.01.12.24 - Relay T-1031 dcKK-4
      • 09.01.12.25 - Ricoh 82 - Closed simplex dc US-5
      • 09.01.12.26 - Ricoh 102 - Closed simplex dc US-5
      • 09.01.12.27 - Ricoh 153 Trig dc LS-2
      • 09.01.12.28 - Ricoh 252 dcLS-4
      • 09.01.12.29 - Zodiak No 150 Duplex Log Log Trig dc DK-4
      • 09.01.12.30 - Hemmi 258 (Post 1460 Versalog) 1951
      • 09.01.12.31 - Sun Hemmi P261 dcXE
      • 09.01.12.32 - Sun Hemmi P262 dcXG
      • 09.01.12.33 - Sun Hemmi P280 (Ahrend 435660) c1973
      • 09.01.12.34 - Sun Hemmi P281 c1973
      • 09.01.12.35 - Hemmi P452 - Business, System H. Kroon
      • 09.01.12.36 - (Hemmi) Hugh-Owens 1766 Electronic
      • 09.01.12.37 - (Hemmi) Hugh-Owens 1768C - date code PA (Jan 1965)
      • 09.01.12.38 - (Hemmi) Hughes-Owens 1777 dcHK (Same as Post 1460 Versalog)
      • 09.01.12.39 - (Hemmi) Hughes-Owens 341-3010 dcSH (Same as Post 1460 Versalog)
      • 09.01.12.40 - (Hemmi) Hughes-Owens 34-3120 Versatrig
      • 09.01.12.41 - Post 1445 8 in Closed Simplex
      • 09.01.12.42 - Post 1446 (post-WWII)
      • 09.01.12.43 - Post 1447 - Date Code CB on front face, no Post logo
      • 09.01.12.44 - Post 1447 - Oval Post Logo on upper stator
      • 09.01.12.45 - Post 1461 Versalog II (Pocket) dcTG
      • 09.01.12.46 - Post 1460 Versalog - Marked Hemmi 258, dcBA
      • 09.01.12.47 - Post 1461 Electronic (1936)
      • 09.01.12.48 - Nestler 0121 Darmstadt
      • 09.01.12.49 - K&E 4051-5 (1936)
      • 09.01.12.50 - K&E 4058W Beginner's Slide Rule (1930-1943)
      • 09.01.12.51 - K&E 4181-1 Log Log Duplex Decitrig S/N 003925
      • 09.01.12.52 - K&E 68-1434 S/N 131170 Log Log Duplex Vector
      • 09.01.12.53 - K&E 68-1565 GP12- Simplex S/N 011932
      • 09.01.12.54 - Faber-Castell 67/87 Rietz Pocket(1965)
      • 09.01.12.55 - Faber-Castell 67/39 Rietz Pocket(1952)
      • 09.01.12.56 - Faber-Castell 67/39 Rietz - 5in (1968)
      • 09.01.12.57 - Faber-Castell 52/82 Schul D-Stab date code 3A
      • 09.01.12.58 - Faber-Castell 57/86 Columbus date code 573 (May 1973), 1962 copyright
      • 09.01.12.59 - Faber-Castell 57/87 Reitz date code 157 (Jan 1957)
      • 09.01.12.60 - Faber-Castell 57/87 Rietz Schul-Rechenstab, date code 1163 (Nov 1963)
      • 09.01.12.61 - Faber-Castell 57/87 Reitz Schul-Rechenstab, date code 965 (Sep 1965)
      • 09.01.12.62 - Faber-Castell 157/87 Rietz, date code 3A (1952), Injection Molded Geroplast
      • 09.01.12.63 - Pickett N-500-ES HI Log Log c1962, Round Black Logo , curved finger braces, Nylon cursor
      • 09.01.12.64 - Pickett Model 300 Log Duplex c1949
      • 09.01.12.65 - Pickett Model 1006 Trig (c1949)
      • 09.01.12.66 - Charvoz-Roos PSR-101
      • 09.01.12.67 - Charvoz-Roos SR-109 (Wood Stock), two-piece clear plastic cursor, c1946
      • 09.01.12.68 - Charvoz-Roos Log-Log (Model Unknown), printed scales. David's number:033
      • 09.01.12.69 - Charvoz (Aristo) 870 Multilog, date code 592 (1959). David's number:323
      • 09.01.12.70 - CREI Charvoz (Aristo) 0903LL Scholar. date code G6011 (1960). David's number:003
      • 09.01.12.71 - Aristo Nr. 89 (Rietz) Date Code GFF15 (1966)
      • 09.01.12.72 - Aristo 99 - Date Code GFF11 (1966)
      • 09.01.12.73 - Aristo 801 Rietz (Charvos-Roos) (in both MiscUSA/Charvos and Aristo galleries)
      • 09.01.12.74 - Aristo 867U Darmstadt - dc HF023 (1965). David's number:320
      • 09.01.12.75 - Aristo Nr. 89 (Rietz) Date Code GFF15 (1966) David's number:322
      • 09.01.12.76 - Aristo 0903 Scholar Note different scales - date code 3FX5 (1969) David's number:006
      • 09.01.12.77 - Aristo 0903 Scholar, date code WLA06 (1970) Note: Aristo and Model number in red David's number:008
      • 09.01.12.78 - Aristo 0903 Scholar, Note different scales - date code 3LT41 (1974) David's number:007
      • 09.01.12.79 - CREI Aristo 0903LL Scholar (Charvoz) date code G6011 (1960) David's number:003
      • 09.01.12.80 - Aristo 0903 VS-2 Scholar, date code 3FE49 (1968) David's number:004
      • 09.01.12.81 - Aristo 0903 VS-2 Scholar, date code 3LS15 (1973) David's number:005
      • 09.01.12.82 - Aristo 0905 Shut-Commerz (Commerce), date code 3FE74 (1968) David's number:009
      • 09.01.12.83 - Aristo 0906 Bi-Scholar, date code 3LA91 (1970) David's number:011
      • 09.01.12.84 - Aristo 0908 TriLog with insert. David's number:013
      • 09.01.12.85 - Aristo 915E Elektro - dc 2LA02 (1970). David's number:015
      • 09.01.12.86 - Aristo 965 Shut-Commerz II (Commerce). date code G641 (1964),David's number:016
      • 09.01.12.87 - Aristo 967U Darmstadt, date code 535 (1953),David's number:018, David's number:018
      • 09.01.12.88 - Aristo 967U Darmstadt with clear rear scale window, date code 2FX07 (1969), David's number:019
      • 09.01.12.89 - Aristo 870 Multilog - date code 592 (1959) David's number:323
      • 09.01.12.90 - Diwa 601, Maxon Premix Burner Co. Muncie, Indiana
      • 09.01.12.91 - Pickett Model 20
      • 09.01.12.92 - Alco #305 Basic Manheim, made in Japan. (note: ISRM has one in its retail package).
      • 09.01.12.93 - Diwa 911 Laminated wood with metal braces. Resembles early Dietzgen patent.
      • 09.01.12.94 - Pickett 800-ES - Log Log Synchro-Scale - 1954, metal cursor bars, rounded braces, grooved slide.
      • 09.01.12.95 - Pickett Model 200 Trig National Carbon Co. Promotional Slide Rule
      • 09.01.12.96 - Pickett Model 200 Trig RCA Promotional Slide Rule
      • 09.01.12.97 - Pickett Model 200 Trig Zach Radio Supply Promotional Slide Rule
      • 09.01.12.98 - W.H. Smith - Jakar 29 Student Log/Log
      • 09.01.12.99 - Wiljon Technik-Art Log Log Trig
      • 09.01.12.100 - Blundell Harling S143-20
      • 09.01.12.101 - Blundell Omega 405 Basic
      • 09.01.12.102 - Blundell Omega 602 Log-Log
      • 09.01.12.103 - Blundell Harling Classmate 812-1
      • 09.01.12.104 - Blundell Harling Classmate 813
      • 09.01.12.105 - Veb Mantissa Mono Rietz 1731 541
      • 09.01.12.106 - Eco-Bra 1611 Darmstadt Special
      • 09.01.12.107 - Reiss Rietz
      • 09.01.12.108 - Reiss Darmstadt DDR
      • 09.01.12.109 - Staedtler Mars 944-82 Log Log
      • 09.01.12.109 - VEB Electro-Apparate-Werke (EAW) Pocket
      • 09.01.12.110 - UTO 930 Studium
      • 09.01.12.111 - Logarex 27103 Rietz (early)
      • 09.01.12.112 - Logarex 27401-X Rietz
      • 09.01.12.113 - Tianjin Squirell 6502
      • 09.01.12.114 - Shanghai May 7th (c1968-1978)
      • 09.01.12.115 - Nestler 0121 Darmstadt Pocket
      • 09.01.12.116 - Pickett N803-ES Modern logo, curved braces, grooved convex lens.
      • 09.01.12.117 - Post 1462H Postrig Made in Occupied Japan 1945-1952,
      • 09.01.12.118 - Lietz 2971-P - date code 57-11 (Nov 1957)
      • 09.01.12.119 - SIC 1530 Technilog dc1961
      • 09.01.12.120 - SIC 1530 Technilog dc1962 with diamond logo
      • 09.01.12.121 - Dietzgen 1765P dc958
      • 09.01.12.122 - Dietzgen 1772A
      • 09.01.12.123 - UTO F2145
      • 09.01.12.124 - UTO Nr3-931U Poly-e Studium
      • 09.01.12.125 - UTO No. 1 Studium
      • 09.01.12.126 - UTO 503 Studium
      • 09.01.12.127 - UTO 561 Studium
      2009.01.11.01 - Received donation of Pickett N15-T GIW Hydraulic slide rules From Dennis Hagler, of Georgia Iron Works. Including a 4 ft version.SR and 1970 Manual Donated by Reab Berry of GIW Industries, 1961 Manual Donated by Dan Hagler(designer of SR). Some artifacts donated by ISRM to the Smithsonian Math History Museum.
      2008.11.20 - Received donation of slide rules belonging to famous motorcycle tuner, Shell Thuet (1912-2011). Donated by Shell himself.
      • 08.11.20.01 - Charvoz (Aristo) 0970 MultiLog Date Code 593 (March 1959) (in both MiscUSA/Charvos and Aristo galleries)
      • 08.11.20.02 - Pickett 800-ES square braces extended cursor bars flat lens.Round Black Logo.
      • 08.11.20.03 -
      2008.11.17 - Lawrence - Eng. Inst. Printer's Proportional Rule. Donation by Ruth Moyer, Reston, VA. Belonged to Alfred Wilcox.
      2008.06.28 - Nestler - Added 1917 Mannheim. ISRM 08.06.28.01. Donated by Marsha Boulton, UK. Used by her great grandfather, Thomas Boulton
      2008.04.10.01 - Dietzgen andCircular - Added Dietzgen 1797M (Gilson Midget) donated by Bruce Chelf of Porter, Indiana

      2007.07.11 - Received two manuals from Anne Hollek, in memory of her Grandfather, Abraham (Jake) Jacobson. (1890-1986) WWI and WWII veteran, man of faith and optimism, retired from the U.S. Post Office. Inventor - US Patent# 2939147 issued 1960.
      • M226 - Post 1447 Slide Rule Instructions
      • M180 - K&E How to Choose A Slide Rule
      2007.02.12.02 - Germany - Staedtler Mars 54401 Darmstadt - (1961) donation by Russel Fox, Anchorage Alaska
      2007.02.12.01 - Aristo - Added 867U - dc 61 23 (1961) donation by Russel Fox, Anchorage Alaska

      2006.12.30 - Donation/Pickett - Pickett PEC-531 General Cable - Cable Pressurization Computer, Donated by Bram Wouters, Arizona.
      2006.12.20.01 - Donation/Ricoh - Skyline Technolog 151 donated by Bill Boas, Lakewood, CO.
      2006.08.04 - Donation - Fedra Log Log dcAug1968 Donated By Seth Balish
      2006.02.07.01 - Donation of W&G Artillery Slide Rule by Stephen Sheen of Australia, used by father, George Sheen in WWII

      2003-2004 Initial 'seed' acquisitions contributed by the Mike Konshak collection to form ISRM. Most of the Konshak collection was donated to Computer History Museum in 2006. The following items were retained to support ISRM. accession numbers are based in part by the date the specimens were scanned.
      • 04.11.10.01 - Aristo 868 Studio - date code 2LST5 (1973) NIB
      • 04.11.10.02 - Aristo 870 Multilog - date code 2FL09 (1967) NIB
      • 04.10.21.01 - Geo. W. Richardson's Direct Reading Slide Rule - 1909
      • 04.11.09.01 - Geo. W. Richardson's 'Slide Rule Of 1917' for J. H. Weil & Co.
      • 04.06.15.01 - K&E Short Base Triangulation Rule US Army
      • 05.01.04.01 - Sterling 684 10" Mannheim, white - 1968
      • 06.01.24.01 - Sterling 684 10" Mannheim, Epoxied - 1968 Belonging to Leslie Konshak
      • 04.10.09.01 - Sterling 565 Sterling 565 "Dial-A-Matic Automatic Adding Machine
      • 04.04.22.01 - K&E 4081-5 20" LogLogDeciTrig sn860426 Replaced cursor with spacers
      • 04.04.23.02 - K&E 4092-3 LogLogTrig sn256159 Retrofit one cursor glass with plastic lens from S.I.C. cursor
      • 04.04.22.02 - Post 1447 - date code dcBI Post logo on slide
      • 04.11.11.01 - Nestler 0291 had missing cursor -Pickett 140 fits fine!
      • 04.10.12.01 - Veb Mantissa Record 1731-421 (was S437)
      • 04.07.03.01 - Reiss Darmstadt DDR
      • 04.09.20.01 - Staedtler-Noris_944-02 - Open simplex (was S361)
      • 04.11.10.03 - Aristo 901 Junior dc1S67 Logo Stamped In Brace
      • 04.11.10.04 - Aristo 903LL Scholar Logo Stamped In Brace
      • 04.11.10.05 - Aristo 0969 StudioLog with "M" logo
      • 04.04.22.03 - Pickett Model 80 Black and clear sleeve
      • 05.03.10.01 - Acumath Connecticut Spring Corp Spring Design - c1955
      • 04.09.27.01 - C-Thru S-96 Circular Slide Rule

      Earlier additions to be added as I am able to recreate the history of updates.


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