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| 79 to 83 of 227 glossary terms |
| globe dial: form of sundial, where the hour lines are on the outer surface of a sphere.
| gnomon: the part of a sundial that casts the shadow for indicating the time.
| golden numbers: numbers denoting the positions of years in the lunar cycle, see article on time and date.
| graphometer: type of surveying instrument, see article on the graphometer.
| gunner's caliper: a instrument used to take dimensions in gunnery, such as the diameter of cannons and projectiles.
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