Navigation slide rule, c 1800.

Hills, Jennie

Navigation slide rule, c 1800.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

'Sliding Gunters', or navigator's rules with a slide, such as this 2 foot example in boxwood, are comparatively rare. Most navigators preferred to stick with the ordinary 'Gunter' scale based on the combination of trigonometric, logarithmic and surveying lines suggested by Edmund Gunter in the 1630s.

Image Details

Artist
 
Image Ref.
 
10328094

© Science Museum / Science & Society Picture Library

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