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slide rule
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slide rule

Mathematical instrument with pairs of logarithmic sliding scales, used for rapid calculations, including multiplication, division, and the extraction of square roots. It has been largely superseded by the electronic calculator.

It was invented in 1622 by the English mathematician William Oughtred. A later version was devised by the French army officer Amédée Mannheim (1831–1906).



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? Mentioned in ? References in periodicals archive
 
The Navitimer wrist instrument is equipped with a circular slide rule that can be used for basic math, as a telemeter, pulsometer, tachymeter, currency converter.
Breitling Watches? Humble Beginnings by Abe S. / Consumer news, advice, product reviews community
On the set of Doctors and Nurses there were these kind of circular slide rule things where you had to put in your weight and your height and it told you what weight category you were in - it told me I was `pre-obese'.
Me & My Health by The Journal (Newcastle, England)
``On the set of Doctors and Nurses there were these kind of circular slide rule things where you had to put in your weight and your height and it told you what weight category you were in -it told me.
Inside out: health check by Daily Post (Liverpool, England)
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