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 369
Fig. 237. Fig. 238. more powerful than steel magnets, but the property they possess,more especially if the iron is quite soft and the bars short, of beingessentially temporary, of only existing during the passage of thecurrent, of being created and destroyed, so to speak, with it,renders them…
Electricity · Magnetism
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