Gunner's quadrant and perpendicular, c 1780.
4 0 c m
 
29cm
actual image size: 21cm x 32cm

Gunner's quadrant and perpendicular, c 1780.

© Science Museum / Science & Society Picture Library

Description

This instrument was designed primarily to ensure that a cannon or mortar was elevated to the required angle. Quadrants were also used for navigational purposes to determine the altitude between some heavenly body and the horizon. George Adams (1750-1795) was instrument maker to George III, as his father was before him.
 

Image Ref.

10302750
 

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