Smith and Dolier's arithmetical scales, late 19th century.
Image number: 10327845
These scales were used to set many different sums in addition and subtraction. Pupils in a class would probably have used slates to do the sums.
- Image number:
- Science Museum/Science & Society Picture Library
- Date taken:
- 30 October 2003 09:16
- Image rights:
- Science Museum