Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 49
of force of a magnetic field. Each individualiron filing becomes a magnet by induction before it isattracted, and when attracted, acts inductively on its neigh-bor in the same manner. The methods given in paragraphs12, 13, 14, etc., for making magnets are based on the prin-ciple of magnetic… … Fig. 43.—Needle Attracted. poles of a poised needle, approaching from an eastern orwestern direction, as in Fig. 43, the needle is deflected fromits original position toward the steel. It induces an unlikepole in the end of the steel nearer to it, and a like poleat the other end. The two unlike…
Electricity · Magnetism
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