The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 58
or any heavy body sus-pended by a thread or small rod from a point of support, and,when disturbed, free to move about such a point as a centre.If a pendulum be drawn aside from its perpendicular or placeof rest, and let fall, it will continue to vibrate in a verticalplane for several minutes, or… … Let P, Fig. 28, represent a pendulum suspended from thepoint C. If we bring this pendulumbqipk to the point P, and let it fall,it will describe the arc P P, reach-ing P with such a velocity as to becarried forward and rise upon the op-posite side of the perpendicular toP; from this point it again…
Physics
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