Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 519
496 CONTINUOUS-CURRENT MACHINES [422- … attached to it, would be nearly unitoim ; the ring, placed in thisfield, acquires by influence poles at the two ends of a diameterwhich are of the opposite kind to those of the adjacent pole-pieces ;it thus absorbs the lines of force proceeding from the pole-pieces,and conducts them through its…
Electricity · Magnetism
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