Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 155
two magnets at themiddle of the bar to be magnetized and simultaneouslydrawing them in opposite directions from the middle tothe ends. A steel bar may be magnetized by striking iton end with a wooden mallet while it is held in the direc-tion assumed by the dipping needle. If a bar of steel beheated… … Fig. 233. The bar may be permanently magnetized by drawing it,from its centre, in one direction over one pole of a power-ful electro-magnet and then, from its centre, in the oppo-site direction over the other pole and repeating the pro-cess a few times (Fig. 233). A bar of steel placed within a…
Electricity · Magnetism
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