McFarlane calculating cylinder, 19th century.

Image number: 10210736

McFarlane calculating cylinder, 19th century.

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:
10210736
Credit:
Science Museum/Science & Society Picture Library
Date taken:
29 October 2003 12:00
Image rights:
Science Museum