Gunner's quadrant and perpendicular, c 1780.

Gunner's quadrant and perpendicular, c 1780.
Gunner's quadrant and perpendicular by George Adams the Younger, 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.
 
Currently on display in:
Mathematics
Year made :
c.1780
Inventory number :
1975-179
 

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