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'La Multi' calculator, c 1920.

Hills, Jennie

'La Multi' calculator, c 1920.
3 4 c m
actual image size: 32cm x 26cm


Prototype of La Multi, a French calculating device which did not prove succesful. The 'La Multi' calculator was based on Napier's bones, developed by John Napier (1550-1617) in the early 17th century, which allowed the user to add instead of multiply.

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© Science Museum / Science & Society Picture Library

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