Napier's Bones

Napier's Bones

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Caption: Napier's bones, an early calculating machine designed by John Napier which converted multiplication problems into a sequence of simple addition.

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Keywords: addition, arithmetic, calculate, calculating machine, calculator, early calculating machine, historical, history of science, invention, john napier, machine, math, mathematical, mathematics, maths, multiplication, napier, napier'ss bones, napier'ss rods

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