Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 52
om that point as a centreindefinitely. A single wave carefully followed by theeye, is seen to move forward unaffected by its neighbors.The length of Fig. 41 represents the length of the wave,and the diameter of the circles, its height. The part raisedabove the surface of the water when at rest, is… … the liquid have a vertical motion, or up and down ; andalso a rotation upon an axis. The vertical movement is well illustrated by Snells Ap-paratus, Fig. 40.* A series ofkeys is moved by an eccentricso that as the crank is turned,they move up and down. Fol-lowing their toj>s with the eye,the…
Physics
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