Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 288
d. We have alreadymentioned that a pieceof iron placed near amagnet—that is to say,in the magnetic field dueto it—is magnetised forthe time being. If thepiece of iron is very small, say, an iron filing, and rests on asmooth surface, the friction arising from its small weight inter-feres but little… … Fig. 155.
Electricity · Magnetism
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