'La Multi' calculator, c 1920.

Image number: 10327822

'La Multi' calculator, c 1920.

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.

Image number:
10327822
Credit:
Science Museum/Science & Society Picture Library
Date taken:
30 October 2003 09:16
Image rights:
Science Museum