George Fuller's spiral slide rule, no 849, c 1880.

Image number: 10210468

George Fuller's spiral slide rule, no 849, c 1880.

The spiral slide rule was invented to increase the length of the scale, and hence the accuracy, of the conventional slide rule. The Fuller's instrument also contains printed mathematical tables. This example was made by W F Stanley.

Image number:
10210468
Credit:
Science Museum/Science & Society Picture Library
Date taken:
20 October 2003 12:10
Image rights:
Science Museum