United Kingdom British Slide Rules England was the home of John Napier (1550-1617), Edmund Gunter (1581-1626), William Oughtred (1575-1660), and many others, giving the British the credit for kicking off the development of the wide use of slide rules and calculators based on logarithims. This gallery shows British based manufacturers and distributors in the United Kingdom that do not have their own gallery. More British slide rules may be found in: Blundell-Harling (BRL);Pocket Watches; Rarities; PIC/Thornton; Unique. Note that Jakar Slide Rules made by Fuji intended for the British market are shown in the MiscJapan Gallery.

KEEP ISRM FREE!

Francis James Anderson

patent GB190309095A.

While a Reconstruction Officer stationed in Waterford, Ireland, with the rank of Major, Francis James Anderson designed aslide rule that folded (sub-divided) the conventional C and D scales into 4 to 8 or more lines to increase the accuracy of the readings without increasing the overall length of the slide rule. He would follow up with another design that was easier to handle than the first. They were made by the firm L. Casella, 147, Holborn Bars, London. from 1904-1910. Anderson became a Lt. Col.

Anderson's Improved Slide Rule 1903 prototype REF	Anderson's Improved Slide Rule 1903 prototype Designed by Lt. Col. Francis James Anderson Made in England by L. P. Casella, 147, Holborn Bars, London. Based on 1903 patent 9095 Front Scale: 8 Folded Scales [ 8 Folded Scales ] 8 Folded Scales - All Single Decade Back: [ blank ] Archive - U.K. Science Museum Collection
Anderson's Improved Slide Rule ISRM 24.07.04.26	Anderson's Improved Slide Rule (1904-1910) Made in England by L. P. Casella, 147, Holborn Bars, London. Based on 1903 patent 9095 Front Scale: 300mm || 4 Folded Scales: C4, C3, C2, C1 [ D4, D3, D2, D1 ] 8 Folded Scales Single Decade || 12inch Back: [ blank ] Gift of Tom Dilatush Collection Specimen at the Powerhouse Museum, Australia.

Albert John Anido

The Anido Slide Rule (1923) MVK 13.02.20.02 British Patent GB195286 Figure 1 & 2

The Anido Slide Rule (1923) Designed by Albert John Anido (1883-1949), of 69 Earls Court, London, England Patent: GB 195,286 March 29, 1923 Note: Railroad track type divisions. Has Special Plus and Minus Log scales used for Constants Conversions. Note: 2: Peter M. Hopp has a reference in his book that eludes to Albert Nestler making slide rules for Anido c1938. Front Scale: 10in (10ths) // +L, A [ B, C ] D, -L \\ 25cm Back Scale: [ Constants Conversions, LE, T ] Well (using beveled end of slide as indicator): [ Sines, Cos ] Gift of Dick Rose, owner of Rose Vintage Instruments, Ohio Albert John Anido (ca1890) Albert John & Ernestine Regina Anido (ca1900) Known history: Albert John Anido was Born in Montevideo, Uruguay (1883). He had a sister, Ernestine Regina Anido (1879-1948) and brother William Nicholas Anido (1881-1914). Mentioned as an elected student in the Journal of the Institution of Electrical Engineers, Volume 40 (1907-1908) page 411. Graduated B.SC.(Eng) at the University of London in 1909. Married to Nellie Helen Blanch Forsdyke. They had a son, John David Forsdyke Anido (1916-2001). The 1914-1919 Jerseymen roll of service includes an Albert John Anido of military age who fought in the First World War and the 21 March 1916 London Gazette lists the London Electrical Engineers: Corporal Albert John Anido to be Second Lieutenant (on probation) working with the anti-aircraft corps. A later record in the London Times shows an Albert John Anido (sn 73845) as being a pilot in training in 1941, but he would have been 58 by then, so this must be some other relation. The 1939 London Gazette shows that he died atFlat 6, Eaton Hall, 15, Eaton Gardens, Hove, Sussex, 22nd January, 1949 and his last profesion as being an Engineering Tutor. Besides his slide rule patent, Albert Anido obtained GB 260,497 Indicating ringing of bells to operators in 1926.

Bendix Limited

Bendix Limited Slide Rule MVK 20.04.01.294	Bendix Limited Slide Rule Made in England.(Unknown maker) - G.E Petty Front Scale: 13cm // A [ B, C ] D Back scale: 5inch [ blank ] .

Boots Ringplan

S349 Boots Ringplan (Mannhiem)	Boots Ringplan (Mannhiem) Made in Japan for Boots Ringplan Pharmacy Chain Front Scale 25cm, A [ B, CI, C ] D, K Back Scale: [ S, L, T ] Original Owner/Location: Unk/England Manual 8.48Mb
Boots Ringplan Precision Log Log MVK 20.02.09.03	Boots Ringplan Precision Log Log Made in Japan for Boots Ringplan Pharmacy Chain Front Scale LL3, LL2, LL1, A [ B, BI, CI, C ] D, DI, K, LL0 Back Scale: [ T2, T1, L, S ] Original Owner/Location: Ruth Stanier/England Instructions (1.95MB PDF)
Boots Ringplan Duplex Log Log REF	Boots Ringplan Duplex Log Log Made in Germany for Boots Ringplan Pharmacy Chain Front Scale L, K, A [ B, CI, C ] D, LL1, LL2, LL3 Back Scale: T1 Cot1, T2 Cot2, DF [ CF, CIF, CI, C ] D, S Cos, ST, P Photo contributed by Rod Lovett Collection
Boots Ringplan Standard REF S294	Boots Ringplan Standard Made in Japan for Boots Ringplan Pharmacy Chain Front Scale 25cm // A [ B, CI, C ] D, K \\ 10in Back Scale: [ S, L, T ]
Boots Ringplan 13cm 5in Standard pocket MVK 20.04.01.335	Boots Ringplan 13cm 5in Standard pocket Made in Japan for Boots Ringplan Pharmacy Chain. Note narrow 24mm cursor Front Scale: 13cm // A [ B, CI, C ] D, K \\ 5in Back Scale: [ S, L, T ] Gift Of Philip E. Stanley, Worcester, Mass.
Boots Ringplan 14cm Standard pocket MVK 20.04.01.220	Boots Ringplan 14cm Standard pocket Made in Germany for Boots Ringplan Pharmacy Chain. Note: wider 27mm cursor Front Scale: 14cm // K, A [ B, CI, C ] D, L Back Scale: [ S, ST, T ] Gift Of Philip E. Stanley, Worcester, Mass.
Boots Ringplan 15cm Precision Log Log pocket MVK 20.04.01.253	Boots Ringplan 15cm Precision Log Log pocket Made in Japan for Boots Ringplan Pharmacy Chain. Note:30mm wide cursor Front Scale: 15cm // LL3, LL2, K, A [ B, CI, C ] D, K, LL1 Back Scale: [ S, ST, T ] Gift Of Philip E. Stanley, Worcester, Mass.

British Slide Rule Co

REF British Slide Rule Co - The Supreme

British Slide Rule Co - The Supreme Made in England Front Scale 10 in // M, S, A [ B, CR, C ] D, T, N \\ 27 cm Back Scale Equivalents Tables Note: CR is usually shown as C1 or R. M & N are usually denoted LU & LL or LL2 & LL3. Photo contributed by Dave Riches Collection

Classic Brand Slide Rules

Classic Series 1 Pocket REF P217	Classic Series 1 Pocket Made in England Front Scale 5inch // A [ B, C ] D || 13cm Back: Conversions Original Owner/Location:Unk/England
Classic Series 1 REF S270	Classic Series 1 Made in England Front Scale 10inch // A [ B, C ] D || 26cm Back: Conversions Original Owner/Location:Unk/England
Classic Series II REF P012	Classic Series II Made in England Front Scale 5inch // UL, A [ B, C ] D, L || 13cm Back: Conversions Original Owner/Location: G. McVittie/England
Classic Log-Log REF S425	Classic Log-Log Made in England Front Scale 10inch // UL, A [ B, S, T, C ] D, L || 26cm Back: Conversions Original Location: England

S.P. Clemenston
17 Buckingham St., Strand, London, England

Clementson Steam Pipe Sizing Slide Rule MVK 14.09.25.02	Clementson Steam Pipe Sizing Slide Rule Made in England by S.P. Clementson, 17 Buckingham St., Strand, London, England Front Scale: Steam Pressure Gauge (Lbs. PER Sq. INS.), Steam Pressure For Velocity Reading [ Pressure Drop, Velocity FT/SEC, LBS/HOUR ] Pipe Diameter, Red Diameters for Velocity Readings Back: Blank Gift of Phillip Rodley, Upper Hutt, New Zealand Phillip Rodley

Dargue Brothers. Ltd. "SIMPLON", Halifax, England

Simplon SR-1 Mannheim 5 inch Got a scan or a specimen to donate?
Simplon SR-2 Mannheim 5 inch Got a scan or a specimen to donate?
Simplon SR-3 Uniface 5 inch Got a scan or a specimen to donate?
Simplon SR-4 Student Mannheim 10 inch Got a scan or a specimen to donate?
Simplon SR-5 Uniface 10 inch Got a scan or a specimen to donate?
Simplon SR-6 Enhanced Mannheim 10 inch Got a scan or a specimen to donate?
S491 Simplon Primary	Simplon Primary Made in England Front Scale: LU, A [ B, CI, C ] D, LL Back: Equivalents Original Owner/Location: Unk/Chinoor, England
P208 Simplon Bilateral S-B-5	Simplon Bilateral S-B-5 Made in England - Pat Pending Front Scale: A [ B, C ] D Back: Scales: A, Sine(S), Log(L), Tan(T), D Reversible bilateral cursor
Simplon Primary LogLog Slide Rule MVK 17.05.02.34	Simplon Primary LogLog Slide Rule Made in England Front Scale: LU, A [ B, CI, C ] D, LL Back: Equivalents Gifted by Mike Weaver, UK
Simplon Bilateral (Log Log) MVK 18.07.11.03	Simplon Bilateral (Log Log) Made in England - Pat 413308 Front Scale: LU, A [ B, CI, C ] D, LL Back Scale: A, Sine, Log, Tan, D Reversible (bilateral cursor) Gifted by Phil Stanley of Worcster, Massachussettes Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.
Simplon SR-10 Bilateral (Rietz System) REF S390	Simplon SR-10 Bilateral (Rietz System) Made in England - Pat 413308 Front Scale (extended) D3, A [ B, C ] D, L Back Scale A, Sine(S), Log(L), Tan(T), D Reversible (bilateral) cursor Original Owner: E.C. Evans/ England
Simplon SR-10 Bilateral (Rietz System) REF S399	Simplon SR-10 Bilateral (Rietz System) Made in England - Pat 413308 Front Scale (extended) D3, A [ B, C ] D, L Back Scale A, Sine(S), Log(L), Tan(T), D Reversible (bilateral) cursor
REF Simplon XL-10 (Log Log) Bilateral	Simplon XL-10 (Log Log) Bilateral Made in England - Pat 413308 Front Scale (extended) LU, A [ B, CI, C ] D, LL Back Scale A, Sine(S), Log(L), Tan(T), D Reversible (bilateral) cursor Archive - Rod Lovett Collection, UK
REF Simplon Electro Log Log	Simplon Electro Log Log Made in England - Pat 413308 Front Scale (extended): LU, A(Kw) [ B(Hp), CI, C ] D, LL Well: Dynamo (Motor), Volt Back Scale: Log, D Back of Slide: A, Sine(S), Tan(T), D Reversible (bilateral) cursor Archive - Cyril Catt Collection, Australia Simplon "Primary", "Bilateral", "Major" Slide rule Instructions (1.6MB PDF) Simplon Special Marks on Slide rule

English Electric Co. Ltd, Strand. London, England 1918-1959

English Electric Co Ltd 1918-59	English Electric Co Ltd 1918-59 Made in England. Note: Pat. ApplN. 30421/38 Front Scale: A [ B, C ] D Back: [ B1, C1 ] (need to reverse slide) Gift of Philip Stanley Collection

Theodore Farmar
100 Station Approach Road, Ramsgate, Kent, England

Farmar's Profit-Calculating Rule	Farmar's Profit-Calculating Rule Made in England - Business Slide rule Roller: Slide: Archive - Scan by Nathan Zeldes, Israel.

Helix LogLog U02 MVK 20.04.01.334	Helix LogLog U02 Made in Japan for Helix Works, Stourbridge, Worcestershire, England. Front Scale S, K, A [ B, CI, C ] D, L. T Back: Blank Gifted by Philip Stanley Collection
Helix LogLog U07 ISRM 17.05.02.54	Helix LogLog U07 Made in England by Helix Works, Stourbridge, Worcestershire, England. Front Scale L, LL2, LL3, A [ B, CI, C ] D, S, T, ST Back: Blank Gifted by Mike Weaver, UK
Helix Top Precision A50S ISRM 17.05.02.54	Helix Top Precision A50S Made in Japan for Helix Works, Stourbridge, Worcestershire, England. Front Scale K, S, A [ B, CI, C ] D, T, SL Back: Blank Gifted by Philip Stanley Collection
Helix Regal A102S ISRM 12.05.02.02	Helix Regal A102S Made in Japan for Helix Works, Stourbridge, Worcestershire, England. Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank Acquired out of England Note: Both the Regal and Hellerman slide rules use the same cursor and may be swapped with each other. Helix Regal series Instructions (2.1MB pdf).

Hellerman Slide Rules Ltd.

1989 London Gazette Liquidation Notice

HELLERMAN SLIDE RULES LIMITED P.O BOX 810, FRIARY COURT 65 CRUTCHED FRIARS,LONDON EC3N 2NP,UNITED KINGDOM Incorporated: 19 Jan 1960 by Esmond Hellerman Dissolved: 1989 Esmond Hellerman imported and distributed slide rules from Japan, Denmark (UTO) and Czechoslovakia (Logarex) as well as numerous other drafting and engineering instruments. The business lasted 29 years.

Hellerman No. 51 ISRM 12.05.02.01

Hellerman No. 51 Made in Japan Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank Acquired out of England Note: Both the Regal and Hellerman slide rules use the same cursor and may be swapped with each other.

Imperial Chemical Industries (ICI)

ICI Arcton Refrigerant Computer ISRM 18.07.11.15

ICI Arcton Refrigerant Computer Made in UK by Imperial Chemical Industries plastic one-piece stock, plastic film cursor Front Scale: °F, PSIG: (gage) Arcton 12, (gage) Arcton 22, (absolute) Arcton 12, (absolute) Arcton 22, °C Back scale: 7in, Boiling Points, Pressure for Refrigerants, 18 cmm 28cm Gifted by Phil Stanley of Worcster, Massachussettes Philip Stanley retired from engineering to become a full-time dealer in and appraiser of antique scientific instruments and tools as The Analytical Engine. He has written two books on antique measuring instruments, and numerous articles on instruments and technology, and has given several talks on these subjects. Phil appeared on the Antiques Road Show on PBS, as an appraiser, in 2012, 2013, 2014.

Norton & Gregory Ltd

S537 Norton & Gregory Ltd

Simplon Primary Made in Japan for N&G (by ?) 25cm divided scales, extruded aluminum cursor 10in // A [ B, CI, C ] D || 28cm Well: Extended 60cm scale Back scale: S, L, T Back: Equivalents Original Owner/Location: Unk/ England

F. S. Ratcliffe
Crawford Spring Works, Rochdale, England

Ratcliffe's Spring Calculating Slide Rule ISRM 13.00.00.72

Ratcliffe's Spring Calculating Slide Rule Made in England (Possibly by Unique) - For designing coil springs Designed by F.S. Ratcliffe for Crawford Spring Works, Rochdale, England Front Scale: D [d, dc, w ] f, D1 [ d1, R ] N Note: scales references on this slide rule are not the same as generic scales Scale explanation: Mean Dia [ Wire dia, Wire dia index, Load ] Stress, Mean Dia [ Wire dia, Spring Rate ] No. of Coils Cursor Scale: C (spring index) Back: Instructions (part one) Well (top): Instructions (part two) Well (bottom): English equivalents of metric spring wire 2 Page Instructions 2.75Mb

W.F. Stanley & Company - Holborn, London, England

W. F. Stanley and Company, manufacturers of mathematical, drafting and scientific instruments, was founded in 1854 by William Ford Robinson Stanley (1829-1909); it became a limited company (corporation) in 1900. In 1861 Stanley invented a prize-winning straight-line dividing machine that was used to make accurate scales for slide rules and other mathematical instruments. Among the slide rules manufactured and distributed by the Stanley company were the C.T. Cooper slide rule and the Fuller spiral slide rule, designed by George Fuller in 1878.

REF Cooper 100 Inch Slide Rule	Cooper 100 Inch Slide Rule Made by Stanley, London for C.T. Cooper & Son. Circa 1920 Dimensions: Height 19.5cm Width 24.5 cm Depth 3cm Material: Polished hardwood fixed with brass screws and with white celluloid (early plastic) calculating scale. The cursor is metal. Scales: C [D ] 20 segments Photo from March 2009 Philip Weiss Auction and the National Museum Of American History

Taylor Instruments / TYCOS / Short & Mason, London

Short & Mason No. 3805 Hygrorule Humidity Slide Rule ISRM 20.04.10.241	Short & Mason No. 3805 Hygrorule Humidity Slide Rule (up to 1977) Made in England Front Scale: Sling/Assman curves (Based on Marvin's Tables - USA) Back Scale (Red): Stevenson Screen (Based on British MET. Office Tables) Back blank Gift of Philip Stanley Collection
Taylor No. 1326 Hygrorule Humidity Slide Rule ISRM 21.06.10.16	Taylor No. 1326 Hygrorule Humidity Slide Rule (After 1977) Made in England Front Scale: Sling/Assman curves (Based on Marvin's Tables - USA) Back Scale (Red): Stevenson Screen (Based on British MET. Office Tables) Back blank Gift of Bob Dehn Collection

Technical Sales Ltd., London

Emblem Series Instructions (19MB)

ISRM Technical Sales 1051 Tutor Emblem Series MVK 12.03.02.06	Technical Sales 1051 Tutor Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale: K, DF [ CF, CIF, CI,, C ] D, A Back: Blank Cursor: Multiple Hairlines Donated by Richard Davis, Las Vegas, Nevada
Need Technical Sales 1052 Olympic Emblem Series	Technical Sales 1052 Olympic Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale L, K, A [ B, CI,, C ] D, S Cos, ST Cos, T Cot, Back Scale 25 cm [ Blank ] 8 in Cursor: Multiple Hairlines
Technical Sales 1053 Olympic LL Emblem Series MVK 12.03.02.07	Technical Sales 1053 Olympic LL Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale L, K, A [ B, CI,, C ] D, S Cos, ST Cos, T Cot, Back Scale 25 cm [ S, LL2, LL3 ] 8 in Cursor: Multiple Hairlines Donated by Richard Davis, Las Vegas, Nevada
\Technical Sales 1071 Commercial Emblem Series MVK 12.03.02.09	Technical Sales 1071 Commercial Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale F1 [ F2, 1/C, C ] D, Units Conversions Back Scale: £, s./d. Cursor: Multiple Hairlines Donated by Richard Davis, Las Vegas, Nevada TS Emblem 1071 Commercial Instructions (7.46MB pdf).
Technical Sales 1081 TechLog Emblem Series MVK 12.03.02.08.X	Technical Sales 1081 TechLog Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale T1, T2, A [ B, BI, CI, C ] D, P, S Cos, ST Back Scale LL3, LL2, LL1, DF [ CF, CIF, CI, C ] D, L, K Cursor: Multiple Hairlines Donated by Richard Davis, Las Vegas, Nevada
Technical Sales 1091 Executive Emblem Series MVK 12.03.02.10	Technical Sales 1091 Executive Emblem Series Made in Japan for British Company T.S. (by Uchida Yoko, Co) Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Cursor: Multiple Hairlines Donated by Richard Davis, Las Vegas, Nevada

The Technical Slide Rule Company, London

The Technical - Aeronautical Slide Rule (all glass cursor) ISRM 17.05.02.36	The Technical - Aeronautical Slide Rule British Made - Wood with (all glass cursor) Front Scale (extended) 10inch // M, P, A [ B, P1, CR, C ] D, K, N \\ 27cm Back Scale: [ S, ST, T ] Back side windows Gift of Mike Weaver, United Kingdom
The Technical - Aeronautical Slide Rule ISRM 14.07.02.01	The Technical - Aeronautical Slide Rule British Made - Wood with celluloid cursor frame Front Scale (extended) 10inch // M, P, A [ B, P1, CR, C ] D, K, N \\ 27cm Back Scale: [ S, ST, T ] Back side windows Gift of Ed Millis, Dallas, Texas
S500 The Technical Standard Slide Rule	The Technical Standard Slide Rule British Made - solid celluloid cursor frame Front Scale (extended) 10inch // M, A [ B, C ] D, N \\ 27cm Back Scale: [ S, ST, T ] Back side windows Original Owner/Location: Unk/England
S240 The Technical Standard Slide Rule	The Technical Standard Slide Rule British Made - all glass cursor Front Scale (extended) 10inch // M, A [ B,  C ] D, N \\ 27cm Back Scale: [ S, ST, T ] Back side windows Original Owner/Location: Unk/England

W. H. Smith & Son

W.H. Smith Simplified Rietz ISRM 17.05.02.06	W.H. Smith & Son Simplified Rietz Made in England (by BRL?) Front Scale K, A [ B, CI, C ] D, L Gift of Mike Weaver, Bridgend, United Kingdom
W.H. Smith Simplified Rietz ISRM 17.05.02.27	W.H. Smith & Son Simplified Rietz Made in England (by BRL?) Front Scale K, A [ B, CI, C ] D, L Gift of Mike Weaver, Bridgend, United Kingdom
W.H. Smith & Son - Log Log Trig REF	W.H. Smith & Son - Log Log Trig Made in England by Blundell Harling for WH Smith Front Scale: L, LL2, LL3, A [ B, CI, C ] D, S, T, ST Back Scale: Blank Scan provided by the Steve Seale Collection, Nashville, Tennessee
W.H. Smith & Son - Log Log Trig (Version 2) ISRM 20.02.25.01	W.H. Smith & Son - Log Log Trig (Version 2) Made in England by Blundell Harling for WH Smith Front Scale: K, L, LL2, LL3, A [ B, L, CI, C ] D, S, T, ST Back Scale: Blank Gift Of John Hawkins of the UK
W.H. Smith - Jakar 29 Student Log/Log ISRM 09.01.12.98	Jakar 29 Student Log/Log Made in Japan by Fuji for British Market Front Scale L, K, A [ B, CI, C ] D, S Cos, ST, T Cot Back Scale: 25cm [ S, LL2, LL3 ] 10in Note: WH Smith sleeve and instructions Donated by David Hecht, Alexandria, VA Instructions 2.73MB PDF
W.H. Smith A505 Master Duplex REF	W.H. Smith A505 Master Duplex Made in England by Blundell Harling for WH Smith Front Scale: LL01, LL02, LL03, A [ B, L, CI, C ] D, LL3, LL2, LL1 Back Scale: K, P, ST, ST, DF [ CF,CIF, CI, C ] D, T, Cot, S, Cos Scan provided by the Steve Seale Collection, Nashville, Tennessee

Westechno Ltd. Exmouth, Devon, England

Westec Electronics Slide Rule ISRM 13.04.26.02

Westec Electronics Slide Rule Made in England by B.R.L. (ref P2361) for Westechno. Ltd., Exmouth, Devon, England Patents: Provisional No.49828 Front Scale (Lr)H, K, (fx)2π, A [ (Cr)B, S Cos, T Cot, (Lx or Cx)CI, XL or fr) C ] D (XC), L, Ln, ST Back: Design aids for Reactance, Resonance, Temperature, Ohm's Law, Frequency and Wavelength, Equivalents, etc. Note: This is the only slide rule, besides those made by Pickett, to have an 'Ln' scale Gift of Phillip Rodley, Upper Hutt, NZ Phillip Rodley

Wiljon Technik-Art

Wiljon Technik-Art Log Log Trig ISRM 09.01.12.99	Wiljon Technik-Art Log Log Trig Made in England by Blundell Harling Front Scale K, LL2, LL3, A [ B, L, CI, C ] D, S, T, ST Back: Blank Donated by David Hecht,Alexandria, VA

Wollaston, William

REF Wollaston Chemical Slide Rule

Wollaston Chemical Slide Rule Made in England by William Hyde Jackson Wollaston_ Front Scale: Chemical Equivalents William Hyde Jackson Wollaston - (1766-1828) United Kingdom. Chemist. Physicist. Physiologist. Practised medicine from 1789-1801. Wollaston became wealthy by developing the first physico-chemical method for processing platinum ore in practical quantities, and in the process of testing the device he discovered the elements palladium (symbol Pd) in 1803 and rhodium (symbol Rh) in 1803. Also known for Camera lucida and Dark lines in the solar spectrum. Developed the Wollaston Slide Rule of Chemical Equivalents in 1814. Made discovery of absorption lines in solar spectrum; 1793 - elected a fellow of the Royal Society (FRS); 1795 - elected a fellow of the Royal College of Physicians; 1802 - The Royal Society awarded him the Copley medal;

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