Rectangular protractor, late 18th century.
Image number: 10328089
A brass rectangular protractor, made by Dollond of London. As well as the usual angular scale the instrument contains a diagonal scale for plotting distances on a map or plan.
- Image number:
- 10328089
- Credit:
- Science Museum/Science & Society Picture Library
- Date taken:
- 20 October 2003 19:09
- Image rights:
- Science Museum
