Question

Who invented Napier's bone? When were they invented?

Answer 1

Answer:

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Answer 2

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Napier's Bones, c. 1690. John Napier, the inventor of logarithms, also invented this aid to calculation known as 'Napier's Bones' in 1617. The 'bones' consist of a set of rectangular rods, each marked with a counting number at the top, and the multiples of that number down their lengths.

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