What's New at ISRM and Ongoing Blog
Most recent Activities, Gifts, Edits and Additions
If you are wondering about the process of creating images for posting slide rules specimens, here is a 7 minute video captured from my screen while editing the many scans required to document a slide rule into one single image.ISRM Scanning Procedure Screen Capture
YYYY.MM.DD-## - Gallery - Description of Edits, Additions[Replacements] or Donations.
2018.09.17 Received gift of s,ide rules belong to the Donald S. Batchelor Collection, by daughter Sarah Harrison of Fort Campbell, Kentucky.
2018.09.07 - Calculators - Added Rockwel 64RD Advanced Slide Rule Calculator. Gift of Marti and manny Leinz of Chino, CA. Added numerous calculator ads from Popular Science and New Scientist Magazine
2018.09.05 - Adders - Added The Lightning Calculator. 1921-1942. Gift of Philip Rodley, Upper Hutt, New Zealand.
2018.09.05 - MiscUSA - Added GUCO No. 139 Thin Film Slide Rule, similar to C-Thru. Gift of Leroy Hausler Collection
2018.09.05 - K&E_Standard - Revised bio on John Vincent Atanasoff origination of the first Digital Computer. from an interview with J.V.A. Jr. and the Curator.
2018.09.05 - France - Added Framed Circular Slide Rule, Unknown Manufacturer, Phot0 provided by Nathan Zeldes in Jeruselum, Israel
2018.09.04 - Post - Added[Replaced] Post 1447 Made In Occupied Japan S452, Leroy Hausler Collection. Post 1444-D Commerce, Robert Curry Collection.
2018.08.19 - Aristo - Added Dennert & Pae (D&P) No.21 Elektro Log Log. Gift of Leroy Hausler Collection.
2018.08.19 - KE_Standard - Added[Replaced] 4088-3 Polyphase Duplex sn137431 1927, Gift of Ellen Hathaway. 4071-3 Duplex Trig sn014420 [S304]. 4055 Favorite sn 833111, Hausler Collection.
2018.08.18 - KE_Specialty - Added K&E 4139 Cooke Radio Rule (SRT scale) - sn452225 and K&E 4143 Kissam Stadia (for Surveyors) sn399383. Gifts of Leroy Hausler Collecction.
2018.08.16 - KE_Standard - Added[Replaced] K&E 4080-5 20inch LogLogTrig sn896492 New Scale Set, 4070-3_ Duplex Trig sn251113 [S303]. Gift Of Leroy Hausler Collection
2018.08.15 - KE_Standard - Added K&E 4092-3 Log Log Duplex sn282613, 3 Patent Dates (Pat. June 5, '00 - Dec. 22, '08 - April 1, 1924) Gift Of Bill Boas
2018.08.10.01 - Military - Added Howitzer 155mm High Angle 7R Charge Vietnam Era slide rule Oct1972 to existing set. Acquisition source unknown.
2018.08.09 - KE_Standard - Added N4083-3 sn833117 Vector LogLog bio info, Belonged to Claude Ellis Johnson (1918-2003) NASA Engineer, Huntsville, Alabama. Notes from daughter, Claudia 10/15/07
2018.08.09 - SR_Library/KE - Added M345 K&E Polyphase Duplex Trig No. 4070 Slide Rule Manual copyright 1939, gifted by Ellen Hathaway
2018.08.08 - SR_Library/British - Added Fowler Universal Calculator manual M392. belongedto Richard Levy
2018.08.08 - Lawrence - Added Engineering Instruments 250-BT belonging to Marilyn Stobbs Ulrich, and Copper Wire Calculator gifted by Leroy Hausler Collection.
2018.08.07 - PocketWatch - Added Fowler Universal Calculator belonged to Richard Levy
2018.08.07 - Concise - Added Sama &Etani 600 (AVCO) belonged belonging to Richard Levy
2018.08.06 - Received 4 slide rules belonging to Richard Levy (1932-2017). Gifted by his his wife, Midge Levy, and his son Benjamin Levy of Vancouver, Washington.
2018.07.31 - Nestler - Added[Replaced] Nr.0130 Multimath[P130], No 21 Darmstadt [S436], Nr 0239 Rietz. Hausler, Barnes Collections
2018.07.30 - Pickett - Added[Replaced] Model 520 Type A-1 Aerial Photo, Magnesium. Model 700 Type A-1 Pocket. Hausler Collection
2018.07.30 - Post - Added[Replaced] Teledyne Post 44AC-600 Versalog II dcWF [S081]. Hausler Collection
2018.07.30 - Dietzgen - Added[Replaced] 1735 Vector Type Log Log Early Frameless Cursor [S508]. Hausler Collection
2018.07.30 - Faber - Added[Replaced] 163/81 Novo Mentor [P108], 57/87 Rietz dc 473. 2/83 Log Log Duplex [S256], 111/87, 1/98 Elektro. 1/87 Rietz [S118]. 57/87 Rietz [S004], 57/89 Austria. Hausler and Barnes collections.
2018.07.30 - Faber - Added[Replaced] 4 variations of the 52/82 23 and 23 scales. 52/82 D-Stab Swiss [S242], 52/82 NoDStabMarks Germany, 52/82 NoDStabMarks Swiss, Gifts of Hausler, Weaver, Barnes Collections.
2018.07.29 - Dietzgen - Added[Replaced] 1739-L Clear-Scale [S357] Same As FC 52-82 Germany. Gift of Dick Rose
2018.07.29 - Blundell/BRL - Added[Replaced] _BRL_Academy_304_Darmstadt [S237] Gift Of Colin Barnes UK
2018.07.29 - Aristo - Added[Replaced] Nr.909 Multitrig [S351], 0901 Junior WFX25 [04.11.10.03], Aristo 99 dcG596 [S99], 0970 multilog dc577, 0969 StudioLog dc2LI5 Wide Cursor. Gifts of Hausler Collection and Colin Barnes
2018.07.29 - Charvoz-Roos - Added Charvoz 0903 Scholar (Aristo) dcG5725. Gift of James J. Pennel Family
2018.07.28 - Hemmi/Geotec - Added[Replaced] Geotec 341-3012 Versalog II [REF]. Gift of the Leroy Hausler Collection
2018.07.28 - Post - Added Teledyne Post 1422 LogLog (Hemmi P262). Gift of Leroy Hausler Collection
2018.07.28 - Aristo - Added[Replaced] 903 Scholar LL dcG6237 [S202] Gift Of Colin Barnes UK
2018.07.28 - Hemmi - Added Hemmi 250 Basic Trig dcMH Aug 1962. Gift of Leroy Hausler Collection
2018.07.28 - Post - Added 1462H Postrig Made In Occupied Japan. Belonged to Dr. Richard E. Chandler, Prof. Emeritus, NCSU. Gift of Leroy Hausler Collection
2018.07.28 - Library/Europe - Added ISRM M388 1/54 and 111/54 Darmstadt with Addiator Instructions. Gift of Bill Boas
2018.07.28 - Library/Japan - Added ISRM M391 Relay Bamboo Slide Rule Instructions. Gift of Bill Boas
2018.07.27 - Post - Added Teledyne Post 44BA-470 (same scales as 1447) with photos and bio Gift of William (Bill) A. Boas of Wray, Colorado
2018.07.27 - Faber - Added Faber-Castell 111/54A Darmstadt Slide Rule w/Addiator with photos and bio Gift of William (Bill) A. Boas of Wray, Colorado
2018.07.27 - Ricoh - Added Skyline No.505 (Relay) dcH.K-4 (1959) and Lutz 151P Multilog. with photos and bio of William (Bill) A. Boas
2018.07.26 - Hemmi - Added Hemmi 40RK dcTA Bamboo and P40RK dcTH. Gifted by Dick Rose. Hemmi 153 no dc Original owner William B. Wood
2018.07.26 - Received gifts of slide rules from William (Bill) A. Boas of Wray, Colorado. Bill was a previous doner in 2006.
2018.07.24 - Blundell - Added[Replaced] Blundell Harling 904 Duplex LogLog [S347]. Gift of Colin Barnes, United Kingdom
2018.07.24 - KE_Standard - Added[Replaced] KE 4053-3 Lot 17 c1916 [10.03.01.10] Donated by Ann Morton of Lakewood, Colorado, Daughter of Henry Stuart Morton
2018.07.24 - MiscJapan - Added Jakar No99 Duplex LogLog. Gift of Colin Barnes, United Barnes. Jakar No.1011 LogLog, Gift of Dick Rose
2018.07.24 - Hemmi - Added[Replaced] Sun Hemmi P280 [Ahrend 435660 is in Netherland Gallery]. Gift of Colin Barnes, United Kingdom
2018.07.24 - Aerospace - Added Cox & Stevens Fairchild C119/RQ4 Load Adjuster Slide Rule. Gift of James Pennel Collection
2018.07.23 - Graphoplex - Added[Replaced] No. 1600. [S255]. Gift of Leroy Hausler Collection.
2018.07.23 - Pickett - Added[Replaced] N904-ES Decimal Keeper [13.02.20.03]. G. Gift of Dorinda Wong, Pleasanton, California. Magnesium 902 1949 [S175] Round braces, Triangle Cursor, Gift of James Pennell Collection
2018.07.23 - Pickett - Added Model 52T Aerial Photo Slide Rule. Mexico. Aerodyne Contract. Gift of Mark Mazzella in honor of owner Howard Nelson, Goshen, NY
2018.07.23 - KE_Standard - Added[Replaced] 68-1648 Old 4153-1 [P110]LoadAdjuster_C119-RQ4 Gift of Leroy Hausler
2018.07.23 - Post - Added Post Versalog dc FF (1955) (Blk Cos, no SN) belonged to Dean Keith Edmonds, Gifted by son Robert Edmonds, Broomfield, Colorado,br> 2018.07.23.01 - KE_Standard - Added[Replaced] Found undocumented K&E 68-1555 old 4168 sn046449.[P104], 4098 sn 34544 [12.06.24.28 if located],
2018.07.22 - KE_Standard - Added[Replaced] 4151-1 [P003]. 4181-1 belonged to Dean Keith Edmonds, Gifted by son Robert Edmonds, Broomfield, Colorado,br> 2018.07.22 - Post - Added[Replaced] 1441 PreWWII_US Blue1888 [P128], 1441 MIOJ, 1441 No Post Logo dcFF 1955. 1441 dcKF [P147]. Gifts of Ed Millis and James Pennel Collections.
2018.07.22 - Post - Added[Replaced] 1447K dcOA (Hemmi on front), 1444K dcEF No Post Oval Logo (Hemmi on back)[P121], 1444K dcLD Post Oval Logo (Hemmi on back)[P170] Gifts of Ed Millis.
2018.07.22 - Military - Added 75mm Howitzer M24 (Chaffee Tank) No.3 vGraphical Firing Table. Gift of Ed Millis.
2018.07.22 - Nordic - Added UTO 651U Darmstdt Hellerman. Gift of Mike Weaver of Bridgend, United Kingdom.
2018.07.22 - British - Added[Replaced] W.H. Smith Simplified Reitz [P207]. Gift of Mike Weaver of Bridgend, United Kingdom.
2018.07.21 - France/MARC - Added two MARC Pocket slide rules. Gift of Ed Millis, Dallas, Texas
2018.07.21 - MiscUSA - Added[Replaced] Guedon MARC Licence Made in France[P153], Promo Builders Iron Foundry Ad. Gift of Ed Millis
2018.07.20 - MiscUSA - Added[Replaced] Charles Bruning 2401 Early Cursor [P163]. Added Bruning 2410 with Texas Instruments Logo.
2018.07.20 - Nordic - Added Diaw 601-1 V2 Lockheed Engineers and Scientist Guild Promo. Gift of Ed Millis
2018.07.20 - MiscUSA - Created B.F. Grizzle sub gallery. Added 1971 Water line capacity SR. Duplicated Grizzle slide rule in Lawrence gallery.
2018.07.20 - Pickett - Added Photo of Polly Hattemer of Redondo Beach to her Pickett N-16-ES slide rule
2018.07.20 - Nordic - Added scans of Diwa 621, 631 Duplex, 641, 661; UTO 602, 631, 661, 651U Duplolog, 651U Darmstadt. Scans from/by Phil Stanley Collection
2018.07.19 - MiscUSA - Added Novotni Paper Board Slide Rule (1917). Scan by Phil Stanley
2018.07.18 - Circular - Added Hutchinson Calculator No.2 Gas and Flow through Pipes. with Manual. Belonged to Robert N. Curry.
2018.07.18 - MiscUSA - Added 2 American Journal Gas Flow Computers to Whitehead and Hoag brand. Belonged to Robert N. Curry.
2018.07.18 - MiscUSA - Added Perrygraph SR catagory for slide charts with slide rules scale. Added 3 slide charts belonging to Robert N. Curry.
2018.07.18 - Aerospace - Added Felsenthal Co FNA-9 Dalton Dead Reckoning Computer Variant. Gift of Leroy G. Hausler Collection
2018.07.18 - Circular - Added Lufkin Rule Company Screw Thread and Tap Drill chart
2018.07.18 - Aerospace - Batori USA, Navigational/Vector Computer. B-23, Type Made in Switzerland
2018.07.18 - MiscUSA - Lietz catagory. Added 1894 Science and Engineering magazine article on the Lietz company
2018.07.18 - Circular - Moved T&T Fast Calculator to MiscUSA Gallery. Moved related items to Aeroospace and Military Galleries.
2018.07.17 - Adders - Added Sheradco Fraction Of An Inch Adding Machine. Gift of Ed Millis.
2018.07.17 - MiscUSA - Added Whitehead & Hoag brand sub-gallery: added 4 more slide rules from ISRM and MIT galleries
2018.07.17 - BrandIndex - Added Whitehead & Hoag, Newark, New Jersey.
2018.07.17 - MiscUSA - Added Whitehead & Hoag Slide Rules: Heliopot Promo and Aeronav Instruments. Gift Of Ed Millis
2018.07.17 - - Hemmi - Added Model 30 10cm pocket slide rule belonging to Arnold D. Straussman (c1908-1983) with bio and photo. Gifted by his daughter Judith B. King. 2018.07.17 - - KE_Standard - Added 4092-3 Vector Log Log sn100651 and 4088-1 Polyphase Duplex sn298504. belonging to Arnold D. Straussman (c1908-1983) with bio and photo. Gifted by his daughter Judith B. King. 2018.07.16 - Aerospace - Added Aeronav Instruments Private Pilots Flight Computer Model-I. Made by Whitehead and Hoag. Gift Of Ed Millis
2018.07.16 - SR_WhosWho - Added entry for Millie Ludwig, who owned Grafton Plastics of Grafton, Wisconsin, that made rebranded slide rules for companies like Bruning and Post.
2018.07.16 - SR_Terms - Added entry for Grafton Plastics of Grafton, Wisconsin, that made rebranded slide rules for companies like Bruning and Post. It was owned by Millie Ludwig and her husband.
2018.07.16 - Received gift of 3 slide rules belonging to Arnold D. Straussman (c1908-1983) with bio and photo, by his daughter Judith B. King.
2018.07.15 - Unique - Added Dualistic High Speed Slide Rule . Ten-Twenty Slide Rule [REF], Gift of Ed Millis 2018.07.15 - United Kingdom - Added The Technical Aeronautical Slide Rule. Gift Of Ed Millis,br> 2018.07.15 - Dietzgen - Added 1735 Vector Type Log Log Rule, sn 111567. Gift of Ed Millis
2018.07.15 - KE_Standard - Added[replaced] 4058C Beginners Slide rule, Version 1 [S478}, 4058C V2. Gifts of Ed Millis, Dallas Texas.
2018.07.15 - KE_Specialty - Added N-4100 Stadia rule sn623559. Gift of Ed Millis, Dallas Texas.
2018.07.15 - KE_Standard - Added[replaced] 4035 Lot 2 all-glass cursor. K&E 4088-3 sn70104 1927 Times Roman Font[S438]. 4093-3 Duplex Vector sn52044 [S263], 4088-3 LogLogDuplex Vector sn833117 1952[S013]. N4053-3 sn61784 c1924 [S584] Gifts of Ed Millis, Dallas Texas.
2018.07.15 - Rarities - Added Dring & Fage DF312 Customs Excise Rule Jan 5, 1862, 24inch.gift Of Philip Rodley, Upperhutt, NZ
2018.07.15 - KE_Standard - Added K&E N4088-5 20" Polyphase sn545519 c1938. 4071-3 Polyphase sn 596150. Gift of Ed Millis, Dallas Texas.
2018.07.15 - Lawrence - Added[Replaced] B.F. Grizzle Gas Pipe Line Slide Rule [Ref]. Belonged to Robert N. Curry.
2018.07.14 - Aerospace - Added Goble Airline Pilots Flight Computer. Gift of Ed Millis, Dallas Texas.
2018.07.14 - KE_Standard - Added[Replaced] 4056 Favorite sn818452 [S053] gift of Ed Millis, 4056 Favorite sn563371 black Cursor, gift of Pamela Eaton. 4081-3 Decitrig sn 703557, belonged to Robert N. Curry.
2018.07.14 - BrandIndex - Added missing reference links.
2018.07.14 - MiscUSA - Added[Replaced] 2 1969 Kel-Co Trot Calculator and Kel-Co Class calculator[S337] for Thoroughbred race horses. Gifts of Phil Stanley. Added expanded information on A. Kelsey Company.
2018.07.13 - Blundell - Added Platts Bros. Textile Hank Calculator with Instructions. Blundell Slideograph. Gift of Phil Stanley
2018.07.13 - MiscUSA - Added Gisholt Time Computer (plastic film construction) and Gisholt Logo. Gift of Phil Stanley
2018.07.13 - British - Added brand catagory and refrigerant slide rule for Imperial Chemical Industries (ICI). Gift of Phil Stanley
2018.07.13 - Acumath - Added Festus Model 50 c1938, predecessor to Acurule 50. Gift of Phil Stanley
2018.07.13 - Relay/Ricoh - Added Compass 1020 Made In USA byBruning. Added Compass Logo to brand header. Gift of Phil Stanley
2018.07.13 - Eastern Europe - Added[Replaced] UGK RGPG Pocket Duplex [P218]. Gift of Phil Stanley
2018.07.13 - Germany - Added[Replaced] Dr. Ing Seehase Promo Slide Rule [P105]. Gift of Phil Stanley
2018.07.13 - Hemmi - Added Hughes-Owens 1762 Made in Occupied Japan. Gift of Phil Stanley
2018.07.13 - MiscJapan - Added Royal MYCOM Refrigerant Compressor Pressure and Conversion. For R12, R22 and NH3 refrigerants. Gift of Phil Stanley
2018.07.13 - Faber - Added A.W. Faber refrigerant vapor pressure convertor for Bitzler F22, F12 and CH3CL refrigerants. Gift of Phil Stanley
2018.07.13 - K&E Standard - Added [Replaced] K&E 4035 8 inch Mannheim Lot 34 [REF]. Gift of Phil Stanley
2018.07.12 - British - Added [Replaced] Simplon BiLateral Log Log [S107]. Gift of Phil Stanley
2018.07.12 - MiscJapan - Added new brand Taisho Kogyo No. 202 combined slide rule and protractor. Gift of Phil Stanley
2018.07.12 - Hemmi - Added Geotec 341-3690 Versalog II. Gift of Phil Stanley
2018.07.11 - Pickett - Added[Replaced] Pickett & Eckel Model 2 DeciLog [S444], Magnesium stock, 1st version. Original retail box. Gift of Phil Stanley.
2018.07.11 - Orient/East Asia - Added[Replaced] Flying Fish 1200 Duplex Log Log. [P261] Gift of Leroy Hausler Collection.
2018.07.11 - SR_WhosWho - Added Philip (Phil) E. Stanley. Long time Oughtred Society member, collector, and contributor to ISRM. Best known as an appraser on the PBS series Antique Road Show.
2018.07.11 - Received gifts of 18 slide rules/slide chart from the collection of Phil Stanley of The Analytical Engine, Worcester, Massachussets.
2018.07.11 - Charvoz-Roos - Added Aristo Maverick Charvos 20-0195 dc1969. Repaired Charvos 0905 Shut-Commerz
2018.07.10 - Hemmi - Added Hemmi No.22 slide rule, a gift from Giuseppe Bianchi in Italy, via Ted Hume, Texas.
2018.07.09 - SR_Loaner - Added photos of students from University of Iowa. Dr. Cynthia Farthing PhD held a seminar titled "Uncovering the Hidden Figures: Women's Role in Mathematics and Science from World War II to Today".
2018.07.08 - SR_Loaner - Added photos of students from Mount Vernon Middle School. ISRM received a stack of thank you notes on 3x5 cards from Kim Bjork's 8th grade class.
2018.07.08 - Pickett - Added images of Pickett 505-ES Accuraspeed Slide Rule designed by E.G. Saenz. Contributed by Brian Sheltra.
2018.06.29 - Ephemera - Added images from 4 movies or TV shows showing slide rules. Courtesy of Paul Holdsworth
2018.06.29 - Ephemera - Added 3 newspaper articles showing Teledyne acuisition of Frederick Post in December 6, 1967. Courtesy of Doug Harland.
2018.05.01.01 - Received gift of Hemmi No.22 slide rule from Giuseppe Bianchi in Italy, via Ted Hume, Texas. Replace References.
2018.04.13 - SIC - Added S.I.C No. 250 circular slide rule belonging to Melvin Eugene Oppliger (c1941-2017). Gifted by wife, Barbara
2018.04.13.01 - Received gift of S.I.C No. 250 circular slide rule belonging to Melvin Eugene Oppliger (c1941-2017). Gifted by wife, Barbara. Replace C35.
2018.04.11 - Aristo - Added[Replaced] 0968 Studio, 0968 V3, 10175 CIE Electrical, Maverick Charvoz 20-0195, gifts of the Leroy G. Hausler family.
2018.04.11 - K&E_Standard - Added K&E 4051-5 20 inch with bio of Joseph J. Graf,, Sr. Gifted by grandson. Joseph J. Graf III.
2018.04.11 - Post - Added Versalog 1460 sn40398 dc March 1963. Gifted By James J. Pennell Collection with bio. Personal slide rule used by James J. Pennell.
2018.04.11 - K&E_Standard - Added K&E 68-1130 Deci-Lon 5 S/N 012785 c1962-1975 Variance with serrated slide. With bio. Personal slide rule of James J. Pennell.
2018.04.10 - Received donations from Frederick Sauter and Glenn Borland
2018.04.07 - Faber - Added/Replaced Faber 63/82 and 63/83 pocket slide rules in retail package. Gift of Leroy G. Hausler collection.
2018.04.06 - Received slide rule collection belonging to Leroy G. (Jerry) Hausler (?-2016) of Seneca, South Carolina. Gifted by his Family of Lakewood, Colorado. Leroy was a retired pharmacist and member of the Oughtred Society from 2006 until 2016.
2018.03.30 - Received donation from Richard Burns.
2018.03.20 - Received gift of a slide rule collection used by Robert N. Curry (192?-20??) in his education and career. Gifted by his friend Alice Bowling of Louisville, Kentucky. Included in the collection is his 1981 book: Fundementals of Natural Gas Conditioning
2018.02.15.01 - Received gift of 4051-5 20" slide rule from Joseph J. Graf Jr.. Belonged to his father Joseph J. Graf Sr. a telegrapher with the Lackawann Rialroad in Scranton, PA. With bio and picture. Add to Gallery
2018.01.18.01 - Received gift of Radio Shack EC-245 Statesman Thin Slide Rule Calculator with charger from Dr. Christopher Fink, Ph.D. of Fredericksburg, Virginia.
2018.01.14 - Received donations from Giuseppe Bianchi, Italy; Jose Gabriel Fernandez, Spain; and Thomas Yorker, New York.
2018.01.03 - Received gift of slide rules used by Dorinda Wong of Pleasanton, California.
2018.01.01.01 - Recieved gift of Pickett 52T Aerial Photo Slide Rule Type A-1, U.S. Air Force. Astrodyne Inc.. Made in Mexico. belonging to Howard Nelson of Goshen, New York. Gifted by Mark Mazzella of Schoharie, New York. To gallery
2017.12.30 - Received donation from Mary J. Levasseur, Brenda Barnes. Now a Friends of the Museum.
2017.12.17 - Received gift of a slide rules from the James J. Pennell Collection from his daughter,Brenda Barnes, and son, Barry Pennell of Apex, North Carolina. James J. Pennell (Jim) was born in Wilkes County, North Carolina June 9, 1927 and died in November 2015. He was an electronics technician caring for the instrument landing system of Raleigh Durham Airport (RDU) for decades after serving in the Navy and Air Force. He used and collected slide rules consistently throughout his life acquiring them from friends and at yard sales. It is an honor to donate his collection to the Slide Rule Museum.
2017.10.13 - Circular - Added Fearns A7 Universal Metric Converter, Donated By Barbara Cunningham, Australia, belonged to Brian Charles Cunningham
2017.10.13 - SR_Library/Japan - Added Hemmin 257 Chemical Engineering slide rule Brief Instructions.
2017.10.13 - Concise - Added(Replaced) Concise Type-E Weights and Measures Conversion Tables Data Computer, belonged to Brian Charles Cunningham
2017.10.13 - Dietzgen - Added(Replaced) Dietzgen 1771 Redi-Rule Promo (P043), belonged to Brian Charles Cunningham
2017.10.13 - SR_Terms/encyclopedia - Expanded W.H. Harling info.
2017.10.12 - Faber - Added Faber Castell 1/87 Rietz, no scale labels, belonged to Brian Charles Cunningham
2017.10.11 - Concise - Added(Replaced) Concise No.32 Key chain with Perpetual Calender(C07). Ed Millis Collection
2017.10.11 - Scanned the Brian Charles Cunningham collection.
2017.10.10 - Received gift of slide rules from Barbara Cunningham, belonged to Brian Charles Cunningham (1935-2013), Willagee, W.A., Australia. Their son Andrew Inherited them but wished to donate his Dad's collection to ISRM.
2017.10.01 - Ephemera - Added scans of Arizona newspaper articles about Pickett in Nogales. Contributed by Douglas Harland
2017.10.01 - Pickett - Added scans of Arizona newspaper articles about Pickett in Nogales. Contributed by Douglas Harland
2017.09.30 - SR_BrandIndex - Added T & T Electric Manufacturing.
2017.09.30 - SR_Library/USA - Added T & T Electric Fast Calculator Instructions, gift of Michelle Black, belonged to father John Black, Morro Bay, California, and an archive image of a specimen from the Sphere Research.
2017.09.30 - MiscUSA - Added T & T Electric Fast Calculator, gift of Michelle Black, belonged to father John Black, Morro Bay, California
2017.09.30 - SR_Library/Pickett - Added N-16-ES Chan Street Electronic Manual. Gifted by Polly Hattemer, Redondo Beach, California
2017.09.30 - Pickett - Added(Replaced) Chan Street N-16-ES Electronic (S354) and N803-ES LogLog. Gifted by Polly Hattemer, Redondo Beach, California
2017.09.30 - Friends - Added Michelle Black and Polly Hattemer to Friends of the Museum
2017.09.25 - Library - Received Fall 2017 Journal of the Oughtred Society
2017.09.15 - Received gift of slide rules and slide charts from Polly Hattemer of Redondo Beach, California
2017.09.12 - Aerospace and Military - Added Fesenthal Dalton Dead Reckoning Computer origalally used by Lt. Col. R.F. Cassidy during WWII in the war in the Pacific
2017.09.12 - Aerospace - Added Stanley manufactured Dalton Dead Reckoning Computer Commercial stainless version (1959). Gift of Ed Millis.
2017.09.11 - SR_Loaner - Sent 20 Post 1447 Mannheims to Dr. Cynthia Farthing, University of Iowa. Included K&E4081-3 and Gilson Binary
2017.09.11 - SR_Loaner - Sent 13 Pickett 140 LogLog to Laurie Emery, South Winneshiek Community School.
2017.09.10 - Aerospace - Added Weems manufactured Dalton Dead Reckoning Computer Commercial plastiv version (1959). Gift of Ed Millis.
2017.09.10 - Misc_USA - Updated Gilbert Small, SMALL Calculator with more views.
2017.09.10 - SR_Library/MiscUSA Added ISRM_M377_Globemaster_No62205_Japan_Instructions_GiftOfEdMillis
2017.09.10 - Misc_USA - Added Globemaster No. 62205 10 inch slide rule, along with logos and company background. Updated
2017.09.09 - Received donation from Michael Vinarcik.
2017.09.09 - Lawrence - added rare 10-B with magnifyiong cursor and 8-B artwork on the back
2017.09.09 - Faber - Added A.W. Faber Castell 1/60 Mannheim date code June 1940
2017.09.09 - Post - Added(replaced) 1450 Versatrig for dcTD1953. Donated by neighbor of Kevin Owen in Denver. (S075)
2017.09.07 - Hemmi - Added 251 MIOJ Cursor, for Mechanical Engineer dcDC1953
2017.09.07 - Misc_USA - Bruning 2401 Pocket Slide Rule Texas Instruments Promo. Gift Of Ed Millis, Dallas Texas
2017.09.07 - K&E Standard - Added ECCO 10000 Copy1946 (same as K&E 9068 Doric) Pocket Duplex Slide Rule . Gift Of Ed Millis
2017.09.06 - Scanned and edited 20 slide rules, mostly K&E
2017.09.04 - Aristo - Added Aristo 0903LL Scholar dcG5925 (1959) Variant. Gift Of Pam Eaton of Dennis, Massachusettes
2017.09.04 - Acumath - Added(replaced) numerous models slide rules to the gallery.
2017.09.01 - Pickett - Added(replaced) numerous models slide rules to the gallery.
2017.09.01 - Received donation from Jan Schoubo of Germany, now a Friend of the Museum.
2017.08.31 - Introduction - Added video of ISRM slide rule scanning process
2017.08.31 - Ephemera - Added Dustin E. Morris Photo of him as a young boy holding his father's slide rule.
2017.08.30 - Hemmi - Added(Replaced) Hemmi 200 16"[400mm] Ultra Accuracy Gift Of Ed Millis, Texas.
2017.08.30 - Post - Added Teledyne Post 1410 (Hemmi P281) dcUC (March 1970. Gift Of Ed Millis
2017.08.30 - KE_Standard - Added Version 1 Decilon 10, no ridges or model number, sn263644. Gift Of Nancy Morris
2017.08.30 - KE_Standard - Added(Replaced) 68-1251 S/N 132850 (S077) decitrig. Gift Of Nancy Morris
2017.08.30 - Misc_USA/Fullerton - Added Fullerton 1450 Version3 (Concise28) Dustin E. Morris Collection. Gift Of Nancy Morris
2017.08.30 - Ricoh/Sans-Steiffe - Added Sans-Steiffe No311 dcILC ( Version 1)Dustin E. Morris Collection. Gift Of Nancy Morris
2017.08.30 - Charvoz-Roos - Added(replaced) Compass SR-108 (P100 Roos) Dual Duplex.
2017.08.30 - Ricoh/Compass - Added Compass (Gilson) 8" Binary Circular Slide Rule and Compass SR-108 (Roos) Dual Duplex.
2017.08.30 - Misc_USA/C-Thru - Added C-thru S-888 Instructions, Dustin Morris Collection.
2017.08.30 - Library/Misc_USA - Added C-thru S-888 Instructions, Dustin Morris Collection.
2017.08.29 - Faber - Added A.W. Faber 367 with Decimal Keeper slide Rule, gifted by Philip Rodley, Upper Hutt, New Zealand. Added link to Trevor Catlow's paper "Dating pre-1920 Faber-Castelle slide rules"
2017.08.29 - Pickett - Added Pickett 800-ES Log Log slide Rule belonging to Dunstin E. Morris, with bio and photo
2017.08.29 - Hemmi - Added Hemmi 256 Radio Communication slide Rule belonging to Dunstin E. Morris, with bio and photo
2017.08.27 - Started scanning submitted slide rules, over 120 scans done in one day. Hundreds more to go.
2017.08.24 - Received gift of slide rules (bio/photo) belonging to Dustin E. Morris (1939-2017) from his wife Nancy E. Morris of Tempe, Arizona. Ham call sign: W7ITM. Thank you letter sent.
2017.08.20 - Received gift of 12 replacement Nestler modern era slide rule cursors from the original Nestler factory stock, from Juërgen Nestler. Cursors for 0215(2),0280, 0370E(3), 0235, Rietz, 0129, 0292
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
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.
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
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
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.
2016.07.01 - Received gift of slide rules from Phillip Rodley, Upperhutt, New Zealand.
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.
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
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 Wright of Odenton, Maryland.
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)
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.
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
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
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..
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.
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 Schools. 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 (1940-2016) in the UK has gifted the following 25 plastic SR's for schools
2015.05.08 - Received Loaner slide rules back from NV Fitton, Alexandria, Virginia.
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.
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.
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
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 - Hemmi 251 dcDC (1953)- Acquired Post 1462H MIOJ to use cursor for a Hemmi 251. Placed a Ricoh cursor on the Post, 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.
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.
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
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.
2014.12.09.01 - 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:
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:
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
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:
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:
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.
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.
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.
2014.06.11.01 - 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.
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.
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.
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.
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
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
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.
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
2013.10.07 - Received new acquisitions from multiple sources.
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
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.
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.
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.
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)
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)
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.
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.
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
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
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
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
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
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
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.