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 166
ndarij coil hy closing and opening,in rapid succession, the circuit of a current inthe primary coil. The essential parts are described in§ 457. In the complete instrument, the axis of the coilsis a bundle of soft iron wires. These wires usually ter-minate in two small plates of soft iron which thus… … Fig. 237. the secondary coil which is made of a great many turns offine, silk covered, copper wire. {a.) The wire bundle {M, Fig 238) becomes magnetized by theaction of the battery current in the primary coil and then adds itsinductive eflPectupon the secondarycoil to the effect ofthe primary…
Electricity · Magnetism
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