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Natural Sources of Power


THE classification of a source of power as a “natural” one is purely arbitrary. The distinction would imply that a source of power could be “artificial,” which would, of course, contradict the first law of thermodynamics. The author of the present volume simply uses the word to describe those sources of power which provide us directly with mechanical energy without any intermediate transformation, such as combustion or the like; and the two particular supplies of energy to which attention is directed are wind-power and water-power.

Natural Sources of Power.

By R. S. Ball. Pp. xvi+348. (London: A. Constable and Co., Ltd., 1908.) Price 6s. net.

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