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
Fig. 15. allowed to come to rest. Sucha line points to the centre ofthe earth. For this reason plumb lines atdifferent points as V and V arenot parallel, while they may evenbe at right angles to each other, asthe horizontal and perpendicularplumb lines of Fig. 15. 84. A plane perpendicularto the… … 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…
Physics
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