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90 to 94 of 227 glossary terms
gunner's sight and level: instrument used to set a large gun to the horizontal, or to elevate and aim it on a target, see article on the gunner's sight and level.
hodometer: device for measuring distance by means of a wheel, pushed along the ground, attached to a geared movement with a dial or other form of distance register.
horary quadrant: quadrant used to tell the time, usually from a measure of solar altitude, see article on the quadrant.
horizon obliquus: line denoting the local horizon on an astrolabe latitude plate, see article on the astrolabe.
