Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 26
Fig. 8.—Magnetising a HorseshoeMagnet. r \ / … Fig. 9.—Magnetisation by Divided Stroke. 8 PRACTICAL ELECTRICITY. to be magnetised, and a strong current of electricity passedthrough the coil from a battery or dynamo, as in Fig. 10, thesteel will be permanently magnetised with a N and S-pole,after the current is turned off. Tapping the end of the…
Electricity · Magnetism
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