The 'Multiplicateur Enfantin' ready reckoner, c 1880.

Image number: 10327828

The 'Multiplicateur Enfantin' ready reckoner, c 1880.

Invented by C L Chambon, the 'Multiplicateur Enfantin' automatic calculator showed multiplication tables up to 50 times 28.

Image number:
10327828
Credit:
Science Museum/Science & Society Picture Library
Date taken:
20 October 2003 18:54
Image rights:
Science Museum