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Scientific American, Vol. 80, No. 17 (April 1899) (1899)

leaf 3

An illustration from Scientific American, Vol. 80, No. 17 (April 1899), 1899, leaf 3
n pulley on the shaft of the drill generator. The exciter N. Marvin, was confronted on all sides with difficulties, the usual manner and are led down to the mines below usually furnished is capable of supply current suf- and the limitations prescribed by the exacting condi- through existing… … not been made in England. Fig. 3.—THE OENEBATOB. spring, 7, which closely resembles a cax © 1899 SCIENTIFIC AMERICAN, INC.

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