American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 180
long of having first made the application,Huyghens is unquestionably the first that, inhis Hbrologium Oscillatoreum, explained thetheory of the pendulum ; and on this ac-count, perhaps, the invention of the pen- dulum clock has been usually ascribed tohim. After demonstrating the true theory ofthe… … cycloidal and a circular curve, and the pointto the right represents the centre of oscilla-tion of an imaginary pendulum. The re-sult Huyghens sought was, that, after thispoint had passed the perpendicular line, itshould be gradually raised up in a certaindegree as it ascended the circular curve ;…
Clocks and watches
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