Gunner's quadrant and perpendicular, c 1780.

Image number: 10328259

Gunner's quadrant and perpendicular, c 1780.

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 number:
10328259
Credit:
Science Museum/Science & Society Picture Library
Date taken:
21 October 2003 10:09
Image rights:
Science Museum
 

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