American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 269
OLOGICAL JOURNAL. A FEW WORDS ON PENDULUMS. EDITOB HoBOLOGICAL .JoTTBNAL : Having read with much satisfaction manyvaluable articles in your Journal, and amongothers some very interesting ones upon pendu-lums, the thought occurred to me that per-haps a few more words might be written onthat subject… … perfect pendulum, which can only be a crea-ture of the imagination. The reasons why acycloidal pendulum possesses this qualitywill appear from the following demonstra-tion : We lay down as a fundamental propositionthat the velocity of a cycloidal pendulum inits lowest point is proportional to the…
Clocks and watches
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