Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 26
e tangent tothe Earth in the meridian at h obviously meets OP in the samepoint c. The pendulum is still swinging in the direction ac, sothat relatively to the tray it will have apparently changed itsdirection in the clockwise direction through an angle hca. Inthe same time the Earth has rotated… … Fig. 4.- -Theory of FoucaultsExperiment. 14 GENERAL ASTRONOMY same time, it follows that the rate of rotation of the pendulumis to that of the Earth as angle bca to angle boa. But angle bca __ arc ab . arc ab __ ao angle boa ac ao ac = sin acO = sin aOA = sine latitude. 11. Other Proofs of the…
Astronomy
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