Wright, Mark R., 1854- · London : Longmans · leaf 237
fects areobtained, but when the currentceases the steel retains its mag-netism. An electric magnet forms an ex-cellent means of magnetising mag-nets (fig. 233). It is only necessaryto draw the bar of steel from one endto the other, repeating the opera-tion several times on both sides. Ifwe rub the… … Fiti. 233
Physics
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