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Scientific American, Vol. 34, No. 13 (March 1876) (1876)

leaf 4

An illustration from Scientific American, Vol. 34, No. 13 (March 1876), 1876, leaf 4
c field of an electro-magnet was much more pow- that a bar of soft iron, surrounded by insulated wire, is sub- magnet, and revolved a series of four coils before its poles erful than that of a permanent one, and that electro-mag- jected to the influence of one of the poles of a perma- As Professor… … nected with a copper conductor, R, bent at right tator. angles so as to pass through the ring. When the In the next place. Page took two magnets and ring is revolved, several of these conductors touch revolved his coils between them. This was the Fig. 5.-GRAMME'S MAGNETO-ELECTRIC MACHINE. © 1876…

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