St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 78
Fig. 94. MAGNETIC EFFECTS OF EIvECTRIC CURRENT. 75 a core. (See Study, Chapter XXII., for experi-ments.) 97. Forms of Electromagnets. Fig. 95 shows astraight, or bar elenromagnet. Fig. 96 shows a simpleform of horseshoe eleHromagnet. As this form is not easilywound, the coils are generally wound on… … Fig. 95- cores which are then joined by a yoke. The yokemerely takes the place of the curved part shown in Fig.96. In Fig. 97 is shown the ordinary form of horseshoeele(ftromagnet used for all sorts of ele<5trical instruments.(See Apparatus Book, Chapter IX., for home-madeelecftromagnets.) 98.…
Electricity
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