The 'Multiplicateur Enfantin' ready reckoner, c 1880.
Image number: 10327828
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
