This non-commercial website was a 60th birthday present from Ros. The name stems from another family member - our daughter Siân. As a teenager she often told her friends: “My Dad? Oh, he collects expensive sticks of wood!”
When the latest PC/tablet is out-of-date in 6 months it may come as a surprise that the Englishman in the image, the Rev. William Oughtred (1575-1660), invented a calculator around 1621 that would be in continual daily use for nigh on the next 400 years. My hobby is collecting and writing about this analogue calculating wonder - the SLIDE RULE.
This site is a virtual “display cabinet” for my collection (as it gets uploaded) of
slide rules and the odd mechanical calculating aid plus a “bookshelf” for my published articles - enjoy browsing.
Anyone needing a “memory jogger” or is just intrigued how such analogue calculators of the past worked, the International Slide Rule Museum has a richly illustrated “How to use …” guide. Afterwards try doing a few trial calculations with Derek Ross’ online simulation of a Pickett N909-ES slide rule. Thinking of starting your own collection? Then the Oughtred Society’s Beginner’s Guide to Collecting Slide Rules is a great place to start.
Educators looking for maths related inspiration & teaching aids/material need look no further than Nicola Marras’ website. But if just looking for reference books on slide rules try one of these: MyList 1 or MyList 2 .
MIR No. 44
A year in the planning has paid off. Over 50 attendees have registered for the 23rd International Meeting of Collectors & Researchers of Slide Rules & Related Historic Computing Instruments. We will meet up in Bonn, Germany – click here for the conference programme.
Check out the 40-odd recently uploaded slide rules all made by French makers. Examples from 8 different makers can now be browsed – from the super rare Calculimetre by Emil David, to the test set by Henri Morin, to the colourful and “very French” modern models of perhaps the best known French maker: Graphoplex.
Site remodelled & restyled to make it “technology neutral”. It should display optimally on any type of h/w device (incl. tablets & smartphones) or browser. Also the restyled search options work faster & more intuitive.
Please tell me what you think ....
Recently uploaded, the only slide rule conceived so vital to the WWII effort that the UK & US governments had it classified.
Many thanks to whoever anonymously sent me a pocket ”Speedy” Ready Reckoner from the UK (postmarked: South Midlands).
The UKSRC Slide Rule Gazette was the guest publication on British television’s highly acclaimed weekly satirical comical news quizz HIGNFY - see the You Tube clip.
|A.W. Faber-Castell||4/60, 4/92, 8/13, 8/14, 8/15 & 8/168|
|Alro||Cobol Analyser, Ha Tex & Truck Tyres|
|Blundell Harling Ltd. (BH)||P4463 Holophane Illuminance Calculator|
|Dargue Brothers Ltd / Simplon||SD10 Duplex + any sub-ivory models|
|Engineering Instruments Inc.||Either circular “vinylite” model|
|Fearns Calculators||Barber Shop Harmony Calculator|
|Graphoplex||6245 & 6250|
|Inglis||FLASH: Pricing, Photographic Exposure, Stock Exchange, Foreign Money, Paper Trades & Health Insurance|
|Kingson||Addiator (combined slide rule & slide adder)|
|L&C Hardtmuth / Classic||10" Series III|
|Lawrence Engineering Services||S-M (C.V. Ore) & Exposure (MIT)|
|Nestler||Cursor (runner) for 342 (50cm) & 24b (100cm)|
|Slide Rule and Scale Engineering Co.||- any -|
|Unique||Norman, Perfectus, Dial, Pioneer Long Scale & Junior|