American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 237
velocity the same as it had at the first instantof its ascent. On the foundation of these conclusions,which are to be found demonstrated mathe-matically in any text-book on natural philos-ophy, the whole theory of the oscillations ofa simple pendulum will be explained by thefollowing diagram. ABC… … oscillation of an imnginary pendulum. Ifthis point be allowed to follow the inclinedplane in the direction of B, the same kind ofmotion will be produced, and it will have ac-quired the tame velocity when it reaches Bas it would if it fell in a vertical line from Hto A ; and the velocity thus…
Clocks and watches
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