• Supplemental Material - Reduction Rule Demonstrator by Greg Miller.
  

• Supplemental Material - The Dundee Coronary Risk Disk Manual.
  
• Supplemental Material - The Faber-Castell 2/84N Mathema; Scale Operationl by Richard Smith Hughes.
  

• Supplemental Material - The Hemmi Pocket Electronic Slide Rule Manual by Richard Smith Hughes.
  

• Supplemental Material - Ross Precision Computer by Richard Smith Hughes.
  

• Supplemental Material - The Boonshaft and Fuchs Direct Reading Frequency Response Sliderule Revisited see Article, page 34.
  
• Supplemental Material - Complex Numbers see Article, page 34.
  

• Supplemental Material - Ace Hoffman see Article page 19.
  
• Supplemental Material - Bob Koppany see Article page 45.
  

• Supplemental Material - Elisha Kally see Article page 51.
  
• Supplemental Material - Crompton US Patent see Article page 56.
  
• Supplemental Material - Crompton French Patent see Article page 56.
  
• Supplemental Material - Crompton Great Britain Patent see Article page 56.
  

• Supplemental Material - Meridiograph see Article page 7.
  

• Revised Table 1: Slide Rule Scale Symbols and Meanings see Article page 40.
  
• Purcell Supplemental Material See article on page 42.
  

• Small Calculator Descriptive Booklet See article page 36.
  
• Small Calculator Instruction Booklet (partial) See article page 36.
  

• Aristo Nr. 10065 System Gruter by Richard Smith Hughes (11.5MB PDF).
  

• Moinot's Second Model Stadia Slide Rule by Otto van Poelje (2.96MB PDF).
  
• Turbulent Flow Slide Rule Instructions (14.9MB PDF).
  

• Pickett C19-T Instructions Supplement to "Pickett C19-T Microwave Transmission Slide Rule" by Richard Smith Hughes (7.3MB PDF).
  
• Full text of references for "Two 'Cadrans Logarithmiques' by Le Blond and Gattey For Old-to-Metric Unit Conversions in France (1799)" by Otto E. van Poelje and Michel Morizet.
  • SEIN 1816 Ampere Rapport Cardran Gattey ref 8 (1.1MB PDF).
    
  • Biographie le Blond ref 9 (1.3MB PDF).
    
  • Biographie Gattey ref 10 (3.2MB PDF).
    

• In Experiments Where Sense Is Judge" - Isaac Newton's Tonometer And Colorimeter. by Charles R. Adams. (11MB PDF - 49 pages). Revised Sep 22, 2014.

Logaritmal a JAVA Script of the slide rule program by Reinhard Atzbach, Germany. (pops up in its own tab).

• Joseph Funke's German Patent. 1920DE335921C on his adding device. supplement to article by Stephan Weiss entitled "Tens Carry Only by Geometry". (204KB PDF).


• Alternative Trigonometric Solutions for Rietz-type Slide Rules by Marion Moon. (230KB PDF).

• George R. Stibitz's Film Slide Rule, by Dieter von Jezierski and David Rance is an Addendum listing Band and tape calculator patents. (804KB PDF).


• Dietzgen Dates by Lodge corrections. Errata for Estimating Production Dates for Dietzgen Micromatic and Microglide Log Log Duplex Slide Rules by Ian Lodge, to correct an incomplete TABLE 2 on page 31.


• Stibitz Calculating Examples V4-1 Errata for George R. George Stibitz's Film Slide Rule by Dieter von Jezierski and David Rance, to correct multiple formula typos in the section "How did the Film Slide Rule work?".


• PROSTHAPHAERESIS AND JOHANNES WERNER (1468- 1522)A history of the forerunner of the logarithm and of its inventor by Klaus Kuehn and Jerry McCarthy (2.59MB PDF).

On Old Russian Cylindrical and Circular Slide Rules by Timo Leipälä. This JOS Plus material is the complete article with Russian names in Cyrillic alphabet. Also included are 19 References for the article, all in Cyrillic, that are not in the JOS article. as we could not typeset the Cyrillic characters. (2.30MB PDF).

• On Old Russian Cylindrical and Circular Slide Rule Patents by Timo Leipälä. to supplement his JOS article. (321KB PDF).


• THE INTRODUCTION OF SLIDE RULES IN SPAIN by Gonzalo Martin (www.photocalcul.com) (Translation by Jose G. Fernández) (1.03MB PDF).

• A Brief Introduction to Transfer Functions to accompany the JOS article "The Hemmi 301 and Boonshaft & Fuchs Slide Rules" by Richard Smith Hughes (0.13MB PDF).


• Calculating Apparatus, Patent US3402285 This is the US Patent to accompany the JOS article "Wang LOCI Calculators - Electronic Calculating by Logarithms" by Peter Holland & Otto van Poelje (0.11MB PDF).


• Some Comments Regarding the Faber Castell Slide Rule Mathema 2/84 by Peter Wutsdorff (3.53MB PDF).


• Basic Slide Rule Operation for Scientists and Engineers by Richard Smith Hughes. This is a lengthy detailed article. The JOS article is a brief introductory version that refers readers to the JOS Plus longer version. (166KB PDF).


• Hemmi 301 Control Engineering Frequency Response Slide Rule Manual accompanies Richard Hughes' JOS article "The Hemmi 301 and the Boonshaft & Fuchs Slide Rules". The JOS Plus material is the a file of the manual, scanned by Paul Ross, with some introductory comments by Hughes.(1.08MB PDF).


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• Extension of Slonimsky's Multiplying Device, by Stephan Weiss (0.11MB PDF).


• Extended version of Nicolaus Goldmann's Architectural Rods, by Hans-Joachim Vollrath (2.59MB PDF).


• Millions of Slide Rules Are Still Made Today,with Thousands of Variations by Walter Shawlee (2.08MB PDF).


• Determining K&E Slide Rule Production Dates, by Clark McCoy and Richard Hughes. This article is composed of two parts; an historical background on K&E's serial number philosophy by Clark, and the methods used in determining the serial number series rollover dates and slide rule dating by Richard. (128KB PDF).


• The Chinese Jiangshi Slide Rule, by William K.Robinson. Bill writes: "The Chinese JIANGSHI type YI (B) Slide Rule is probably the most unusual of all of those shown in my JOS listing of slide rules with hyperbolic function scales." (692KB PDF).

David M. Riches
Sterling Slide Adders

This is the companion web page for the article by David Riches in the Journal of the Oughtred Society, Vol. 19, No. 2, Fall 2010. It contains:

List of figures and captions for Sterling Slide Adders (72KB PDF)

and 14 figures from the article, plus an additional 5 images (JPG)

Fig01 Addiator 1 Fig02 Addiator 2 Addmaster Old 1 Addmaster Old 2 Fig03 Addmaster Old 3 Addmaster New 1

Addmaster New 2 Fig04 Addmaster New 3 Fig05 Arithma Fig06 Kingson Fig07 Produx Fig08 Produx Original

Fig09 Correntator 1a Fig10 Correntator 2a Fig11 Exactus 1b Fig12 Exactus 2b Fig13 Pocket Adding Machine Fig14 Addometer

This is the companion web page for the article by Otto van Poelje in the Journal of the Oughtred Society, Vol. 19, No. 2, Fall 2010. It contains:

• El Milick in LIFE 21-3-1949 page20 (JPG)
• French Patent By El Milick FR1007309A (PDF) (48KB PDF)
• Montre Logarithmique Manual (In French Language) (1.06MB PDF)

Bryan Purcell
Using Old Tools to Solve a Modern Problem
The Reintroduction of the Slide Rule to the Classroom

This is the companion web page for the article by Bryan Purcell in the Journal of the Oughtred Society, Vol. 19, No. 1, Spring 2010. It is the unabridged original eight page version of the article, in which Bryan discusses many positive aspects of using slide rules in the classroom.

Read the Unabridged article (341KB PDF)

This is the companion web page for the article by Otto van Poelje in the Journal of the Oughtred Society, Vol. 19, No. 1, Spring 2010. It contains:

• Dutch and English versions, translated page by page, of the description booklet for the Ayres Disc slide rule. (60KB PDF)
• Dutch and English versions, same as above, of the original description booklet for the Ayres Disc slide rule, with images of each page of the original booklet. (16MB PDF)

This is the companion web page for the article by Richard Davis in the Journal of the Oughtred Society, Vol. 19, No. 1, Spring 2010.

Read the Dempster RotaRule brochure from 1928-1929. (3.5MB PDF)

This is the companion web page for the editoral by Bob Koppany in the Journal of the Oughtred Society, Vol. 19, No. 1, Spring 2010, in which he mentions the new cover design. Designing a new cover for the Journal was quite a challenge. During the process Bob studied several possible designs, the last of which appears as the cover of JOS Vol. 19, No. 1 and is planned to be used on all future issues.

View these cover designs (1.1MB PDF).

Clay Castleberry
Multitasking Slide Rule for the 1950s

• Chadwick #7285 Computer Lighter Instructions (1.4MB Jpeg) Chadwick #7285 Computer Lighter Instructions (302KB PDF)
  
  This is the companion web page to the article "Multitasking Slide Rule for the 1950s" by Clay Castleberry, in the Journal of the Oughtred Society, Vol. 18, No. 2, Fall, 2009.

Peter Alfeld
Many Formulas

Below are links to PDF files with all expressions described in that article. In all Tables, Exp(x) means 10 to the power x, exp(x) is the natural exponential of x, log(x) is the base 10 (common) logarithm, and ln(x) is the natural logarithm.

• One variable expressions. (145 expressions,7 pages, 44KB)
• Two variable expressions. (3540 expressions,277 pages, 660KB)
• Three variable expressions. (24314 expressions,1902 pages, 4.82MB)
• Display from OS 2009 Winter Meeting:
  • Title Page (one page, 16KB PDF)
  • Introduction (two pages, 24KB PDF)
  • Concise List of two variable expressions (fifteen pages, indexed to complete list, 304KB PDF)

Richard S. Hughes
Updated Stadia Slide Rules Table (and images), p. 33

Richard Smith Hughes
Faber-Castell 989 Komplex-Rechenplatte

• Faber-Castell 989 Komplex-Rechenplatte (MS Word Document ~16MB) Faber-Castell 989 Komplex-Rechenplatte (pdf Document 7.06MB)
  
  English Translation of the German Manual by Dieter von Jezierski & Rodger Shepherd - Published here by the kind permission of Dieter von Jezierski and Rodger Shepherd

William K. Robinson
Mendell Penco Weinbach and the K&E Log Log Vector Slide Rules

• Mendell Penco Weinbach and the K&E Log Log Vector Slide Rules (MS Word Document ~4MB) (Adobe PDF Format 5.4MB)
  
  An indepth article about Professor Mendell Penco Weinbach and his contributions to the development of the two K&E Log Log Vector Slide Rules, models 4093 and 4083.

Otto van Poelje
Sliding Gunter, pp. 12-18

• Table of books and specimens of sliding Gunter rules
  (Microsoft Excel format)
  as discussed in The Sliding Gunter - Versions for Navigation at Sea.

Werner H. Rudowski
The Oldest German Slide Rule, pp. 1-4

• The Oldest German Slide Rule
  Updated 10-24-2007 (Adobe PDF format 6MB)
  

Werner H. Rudowski
How Well Known, pp. 1-9

• How Well Known Were Slide Rules in Germany, Austria and Switzerland Before the Second Half of the 19th Century?
  Updated 10-01-2007 (Adobe PDF format 5MB)
  

Richard Smith Hughes and William K. Robinson
Table 6, p. 59

• Chinese vector (hyperbolic) slide rules. (HTML format) updated 12/2006

Otto van Poelje
The Navigation Scale, Improved by B. Donn, p. 36

• Benjamin Donn pamphlet, "The Description and Use of the Navigation Scale, 1772, 12pp., transcribed by Otto van Poelje. (PDF format)

William K. Robinson
Slide Rules with Hyperbolic Functions, p. 55

• Table of all known hyperbolic slide rules. (HTML format) updated 12/2006
• Table of all known hyperbolic slide rules. (XLSX format) updated 05/02/2012

Warren M. Salomon
Hemmi's 50 Centimeter Slide Rules, p. 18