Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 33
ig. ic. line. A liquid at rest, Fig. 16, presents a horizontalsurface. 85. Deviation of the Plumb line. A plumb line suspended near a large mass ofmatter, e. g., beside a mountain, is attractedby the mountain as well as by the rest of theearth. This causes it to move towards themountain, and the… … Dr. Maskelynesuspended a plumbline upon oppositesides of Mt. Sche-hallien, in Scot-land, see Fig. 17,and found the de-viation of each tobe about six sec-onds of arc. FromFig. 17. this he determined the attraction of the mountain, and then the density of the earth. He found the last to be about five…
Physics
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