. Machinery and processes of the industrial arts, and apparatus of the exact sciences. ircuit a feeblegalvanic battery, but experiment has proved otherwise. Indeed, afterthe machine has once been operated, it will not even be necessary tocall in the aid of terrestrial induction. Traces of magnetism will hanground even soft iron for a long period after it has been once magnet-ically excited, and these traces will suffice to start the series of reactions WILDES MAGNETO-ELECTRIC MACHINE. 429 by which the power of the machine is developed, whenever the arma-ture is put into motion. The idea of tur
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. ircuit a feeblegalvanic battery, but experiment has proved otherwise. Indeed, afterthe machine has once been operated, it will not even be necessary tocall in the aid of terrestrial induction. Traces of magnetism will hanground even soft iron for a long period after it has been once magnet-ically excited, and these traces will suffice to start the series of reactions WILDES MAGNETO-ELECTRIC MACHINE. 429 by which the power of the machine is developed, whenever the arma-ture is put into motion. The idea of turning back upon an electro-magnet, for the sake of aug-menting its power, the current generated by itself in the envelope of anarmature revolving before its poles, is not original with Mr. Ladd. Itis the second armature, introduced for the purpose of generating a cur-rent capable of being directly utilized, which constitutes his history of the successive steps of progress by which this construc-tion has been at last suggested, is not without interest. Fig. 88. Fig. Fig. 90. Fig. 91,
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