Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 502
bins is the same as would be produced by introducing intothem the poles of the magnet. To render the electrical pulsations of this class ofmachines very frequent, the armature may be rotated, asshown in Fig. 466, which represents a modification of an old Fig. 467. … and well known magneto-induction machine, in which thebobbins, D, are placed on pole extensions of the magnets,C, and the variations in magnetic force are produced bythe wheel armature, E. Another method of generating currents by a rotary 48o EXPERIMENTAL SCIENCE. Fig. 468.
Physics · Lantern projection · Electric apparatus and appliances
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