Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 278
equivalent of heatare illustrated in Fig. 293. Apaddle-wheel was made to revolvein a vessel of water by a fallingweight connected with it by pulleysand cords. Joule measured theheat produced by the motion ofthe paddle and the correspondingamount of work done by tlie de-scending weight. He… … Fia. 293.—Principle of Joules ap-paratus for determining the me-chanical equivalent of heat. 268 HEAT AND MECHANICAL MOTION mechanical energy. Later investigations by Rowland andothers placed the constant at 778 foot-pounds for one B.T.U.of lieat, which is equivalent to 4.187 joules (41,870,000…
Physics
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