Calculator

Napier's rods, 1600s

This is an early form of calculator. It was invented by Scottish mathematician John Napier of Merchiston to help with multiplying or dividing large numbers. Napier's rods were used by architects, mathematicians and scientists.

[Museum of London]

 

Part of Fire! Fire! a Museum of London exhibition marking the 350th anniversary of the Great Fire of London (July 2016 to April 2017).

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