Quote:
Originally posted by jubilance1922
Its an early form of a calculator. Once you learn the scales, you can move the ruler (you "slide" it) and that does the multiplication or division for you.
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Although slide rules were rarely used for simple arithmetic.
The first practical pocket calculator was invented in a concentration camp by Dr. Curt Herzstark. It was called the Curta and was the mainstay of many an engineer and scientist until the 1970s, when digital pocket calculators replaced them. Early models command top dollar on eBay and other secondary collector markets.
The Curta calculator:
More info: http://curta.org/
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Causa latet vis est notissima - the cause is hidden, the results are well known.
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Last edited by AlphaSigOU; 07-30-2005 at 09:44 PM.
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