a. An instrument to measure the value of gravity or for measuring variations in the magnitude of the Earth's gravitational field. Measurements of gravity are accomplished generally by one of three methods: dropped ball, pendulum, or spring gravimeter. The latter type of gravimeter, which is based upon the principle of the weighted spring--where the length or measured variations in the length of the spring are a function of the gravitational field at different locations, is the type widely used today. See also: Graf sea gravimeter; gravitational prospecting. Hunt b. An instrument for determining specific gravities, particularly of liquids. See also: hydrometerc. An instrument that measures variations in the density of underlying rocks. BS, 9 d. An instrument for measuring variations in the gravitational field, generally by registering differences in the weight of a constant mass as the gravimeter is moved from place to place. Syn: gravity meter See also: astatic gravimeter
Source:
Dictionary of Mining, Mineral, and Related Terms












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