An Early Example Of A Portable Calculator
More than three centuries ago, the Parisian physician and polymath
Claude Perrault devised a fascinating small mechanic calculator, Abaque
Rhabdologique. Subsequently, many mathematicians and inventors have
improved, and re-shaped, Perrault's ingenius machine.
As an heir of this tradition, Troncet created what he called the Arithmographe. Essentially, it is a small stylus-driven metal calculator consisting of flat metal bands with notched edges pointing at numbers from one to nine.
As an heir of this tradition, Troncet created what he called the Arithmographe. Essentially, it is a small stylus-driven metal calculator consisting of flat metal bands with notched edges pointing at numbers from one to nine.
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