Pendulum Moves East to West
The observations, so numerous and so important, of the pendulum as object are especially relevant to the length of its oscillations. Those that I propose to make known to the [Paris] Academy [of Sciences] are principally addressed to the direction of the plane of its oscillation, which, moving gradually from east to west, provides evidence to the senses of the diurnal movement of the terrestrial globe.
Léon Foucault, Jules Antoine Lissajous, Recueil des travaux scientifiques de Léon Foucault ... (1878)
Notes
Demonstrating the rotation of the Earth.
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Pendulum Moves East, West Demonstrating, diurnal movement, terrestrial globe, Academy [of Sciences] are principally addressed to the direction of the plane of its oscillation, which, moving gradually from east to west, provides evidence to the senses of the diurnal movement of, oscillations, oscillation, rotation, senses, plane, length, observations