Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 624
CENTRIFUGAL FORCE. 6l more. Thus it was discovered that, as the movements ofthe pendulum are dependent upon the force of gravity,and as this force decreases the farther we get from thecentre of the earth, the equator must be farther from theearths centre than the poles, and therefore the poles must
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