McFarlane calculating cylinder, 19th century.
Image number: 10210736
A cylindrical form of slide rule made by McFarlane. Cylindrical slide rules, like circular versions of the instrument, were designed to get greater scale length than would be practical with a conventional slide rule. This enabled calculations to be made with greater accuracy than with a standard slide rule.
- Image number:
- Science Museum/Science & Society Picture Library
- Date taken:
- 29 October 2003 12:00
- Image rights:
- Science Museum