The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J. (Charles Joyce), 1839-1917 · New York, J. Wiley & sons; · leaf 74
ring, the ball will rotate about the axis of the string,while the plane in which it vibrates will not be affected. Now, let us suppose that a pendulum is suspended at the northpole, and is made to vibrate: and let us further suppose that theearth rotates from west to east, once in 24 hours. The… … PENDULUM EXPERIMENT. 69 will move about in the plane of the horizon, in a direction op-posite to that in which the earth is rotating, and with an equalvelocity, thus completing one revolution in 24 hours. In Fig.28, let ACBD be the horizon of the ob-server at the north pole, and let the earthrotate…
Astronomy
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