Calculating Gears - January/February 1997
The article "Calculating Gears" appeared in the January/February 1997 issue of Gear Technology.
Interesting gear factoids discovered wasting time on the Net while pretending to be working...The first four-function mechanical calculator was built by the mathematician Gottfried Leibniz in 1694. While not commercially available for nearly 200 years, the design was the basis of many such calculators until well into this century.
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