Slide Rule Info
OS Slide Rule
Long Scale SRs
History of SRs
Slide Rule Fun
About the OS
Resources - Information Available
Slide Rule Seminar
OS Numeracy Card Instructions (revE)
"NUMERACY" has sometimes been defined as the quantitative version of "literacy", leaving the
burden of definition to that older term. Many definitions of Numeracy have been created, from
"ability to do arithmetic", or "handling a 4-function calculator", up to the more
"Numeracy is about grasping numbers and units, their names, values, and calculations."
The Oughtred Society (OS) Numeracy Card can be used as an aid to remember the
names of numbers by their values, as measurement tool for units of length, and as a slide rule for
basic calculations. The OS Numeracy Card is a handy companion of credit-card size, a perfect fit
to carry along in the wallet at all times.
How Slide Rules Helped Win the War
This online course on slide rules contains video lectures and reading materials,
with links to other resources. The course will teach you how slide rules operate, how to use a slide rule, and some information
on related topics. Dr. Alex E.S. Green is the instructor, Julio C. Castro designed the online course.
Slide Rule Books, Manuals and Publications
- Meilensteine der Rechentechnik by Herbert Bruderer is a new publication (in German) giving an in-depth history of mathematics
and computer science including descriptions of many historical devices used for calculations. An extensive review is given by the
Mathematical Association of America.
Book ordering information can be found from de Gruyter Oldenbourg, Berlin/Boston
Beginner's Guide to Collecting Slide Rules (1.54Mb PDF)
is a new "on-line" publication on this website.
It contains the following chapters:
- Why collect slide rules?
- What slide rules to collect?
- What makes a slide rule valuable?
- Where to buy slide rules?
- How to find more information about slide rules?
- Slide rules that are popular with collectors.
The last chapter is a list of 97 suggested slide
rules in 4 categories -- Inexpensive, Medium
priced, Higher priced, Highest priced.
Thumbnail images appear in the 4 categories
above and are clickable to view a detailed image
with description for each rule.
Beginners Guide was created by Ted Hume and
All About Slide Rules
The Oughtred Society is pleased to present this new document for all to use.
With this document, the Oughtred Society wishes to introduce itself and provide a service to the
great numbers of slide rule enthusiasts, collectors, and users with whom the Society is not currently
acquainted. In doing this, the Society extends an invitation to all to join us in this fascinating
This online document, All About Slide Rules, presents what its title suggests, complete information
about slide rules. In its seventeen chapters, with 103 pages and 114 photographs, it contains
information of all types, from What Is a Slide Rule and How It Works, to History, to Common and
Less Common Types, to How to Use a Slide Rule, to Major Makers and Some of Their Common
Models, to Books and Manuals, to Cleaning and Care, to Slide Rules on the Internet, to Collecting
... and more.
Books, Manuals, and Articles
This chapter from the All About Slide Rules book is a reference list containing 75 books and manuals, compiled by David Sweetman.
ISRM Libraries - Free Downloads of Books and Manuals
Over 500 titles of text and materials are available from
International Slide Rule Museum . Library galleries are organized by catagory, country or manufacturer:
General (including Circular and Aviation models), Books (out of print), United States, Russia/China,
Japan, British/Australia, Europe/South America, Pickett, Post (and Hemmi),
Keuffel & Esser, Dietzgen,and Retail Catalogs. Many scanned and archived from Oughtred Society members from around the world.
Mike Konshak, the ISRM curator, is an active member of the Oughtred Society.
K&E Salisbury Products
Division Slide Rules
A personal story by former K&E Production
Manager and Plant Manager, Joseph L. Soper, including many of the details of the latter years of
K+E's slide rule manufacturing and production. There are 102 photos shown within
the 145 pages of this book.
- The United Kingdom Slide Rule Circle (UKSRC)
has more than 200 reprints available at low cost.
List of Reprints [Acrobat PDF document].
To order, Contact the UKSRC by e-mail at "email@example.com".
Or visit the
UKSRC's Web site.
Books and Manuals
are available from slide rule dealers and
on eBay from time to, and as scans for free download.
See, variously, these sources:
- The German Slide Rule Group
(Rechenschieber-Sammler-Treffen) maintains a
recommended book list
RST Web site.
- The Dutch Circle of Slide Rule Collectors
recommended book list
Circle Web site.
Recent specialized books about slide rules:
Click title to see cover
- Joint Slide Rules, by Peter Hopp. 19.85 GBP (about $31.70)
plus 3.42 GBP (about $5.50) shipping from the UK to USA,
Buy at www.ebay.co.uk
- Pocket Watch Slide Rules, by Peter Hopp. $39.95 plus $6.00
shipping from Astragal Press in the USA to USA addresses.
- Otis King Calculators, a History of Production 1920-1977,
by Colin Barnes and Tedford White. 18 GBP (about $29.39)
plus 6.75 GBP (about $11.02) shipping from the UK to USA.
Contact Colin Barnes. colinabarnes "a t" talktalk.net
- Rechenschieber--Slide Rules A.W.Faber--A.W.Faber-Castell,
by Peter Holland. 15 Euro (about $20.77) shipping to USA
included from Peter Holland. pholland "a t" t-online.de
- Collectanea de Logarithmis, by Klaus Kühn. EURO 50 ( about $70).
For more than ten years Klaus Kühn has studied the history of
logarithms and logarithmic tables. At the IM2013 meeting in Berlin
he presented the results of his study, packaged in a tool called
Collectanea de Logarithmis (Collected Works Concerning Logarithms).
The tool gives access to thousands of articles, books, tables and
other publications on history of the invention, calculations,
tabulations and applications of logarithms from mediaeval times until
the present - 2014 being the quadri-centennial anniversary of Napier's
first book on the logarithm, Mirifici Logarithmorum Canonis
The tool consists of a DVD with a USB-stick protection "dongle",
giving access to an online database.
Rod Lovett maintains
a searchable database of the
slide rule literature
- The Oughtred Society's
Journal of the Oughtred Society.
- The United Kingdom Slide Rule Circle's
Skid Stick and Slide Rule Gazette
of the International Meetings of Slide Rule Collectors,
Hyperbolic Slide Rules
Bill Robinson has been continually updating this significant work from when it was first published in a 2005 Oughtred Society Journal.
In addition to the spreadsheet format below, a new gallery devoted to Hyperbolic Slide Rules
has been created.
Long Scale Slide Rules
Ed Chanberlain has been interested in long scale slide rules for many years and has compiled a list devoted to
Long Scale Slide Rules
Why Slide Rules Work
Mathematical Foundations of the Slide Rule, by Professor Joe Pasquale, University of California, San Diego
Abstract: We present a mathematical principle that provides a precise formulation for the types of
functions a slide rule can be designed to calculate. In addition to providing the
mathematical foundations for how and why a slide rule works, this principle establishes
its mathematical possibilities and limits. We also present the theory of how slide rule
scales are constructed.
Slide Rule Prices
Rod Lovett maintains
a searchable database of
eBay slide rules sales
from October, 1999, to present.
Slide Rule Web Sites
The Oughtred Society Web site's
Links Library has
a comprehensive, up-to-date list of Web sites on slide rules and other calculating instruments.
Other Slide Rule Information
Free Download: All About Slide Rules by the Oughtred Society
What is a Slide Rule
How a Slide Rule Works
Learning Your Way Around a Slide Rule
Common Scales and Their Functions
Common Types of Slide Rules
Major Companies and Some of Their Common Models
Less Common Types
Tricks and Time Savers
Cleaning and Care
Slide Rules on the Internet