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 209
f« Magnetic Pop Gun. 10. Typical Two-Pole Magnet. Fig. 181.—Typical Forms of Electromagnets 11. Stevens and HardytPlunger Magnet. 1W ELECTROMAGXKTS. 191 strutted to meet special requirements, according to the par*iicular work to be performed by them. When it is desireto construct an electromagnet…
Electricity · Magnetism
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