. Cassier's magazine. A MODEL ELECTRIC MINING PLANT 269. 270 CASSIERS MAGAZINE iiiiiiiiiiiiipiiiS A VIEW OF THE POWER HODSE AND SECTION OF THE DAM, LOOKING UP-STREAM profitably by the use of electric powertransmitted long distances. Mining is one of the industries chieflybenefited by the use of electricity formotive power; primarily by reason ofits cheapness it permits the treatment ofores of very low grades at a profit. Thesecondary consideration is that whateverpower,—steam, air, or electricity,—beused in a mine, it must necessarily bevery flexible and at the same time asefficient as possibl


. Cassier's magazine. A MODEL ELECTRIC MINING PLANT 269. 270 CASSIERS MAGAZINE iiiiiiiiiiiiipiiiS A VIEW OF THE POWER HODSE AND SECTION OF THE DAM, LOOKING UP-STREAM profitably by the use of electric powertransmitted long distances. Mining is one of the industries chieflybenefited by the use of electricity formotive power; primarily by reason ofits cheapness it permits the treatment ofores of very low grades at a profit. Thesecondary consideration is that whateverpower,—steam, air, or electricity,—beused in a mine, it must necessarily bevery flexible and at the same time asefficient as possible. Although the twofirst-mentioned powers are flexible andefficient to a certain degree, they can-not compete with electricity in these re-spects. A comparative test, underaverage conditions, would show a widemargin in favour of electricity, especiallyif the latter be derived from a water- power generating station. It is notthe intention of the writer, however, toenter into any mathematical comparisonof the relative motive powers, but togive a simp


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