Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 367
ng contact. Without a condenser we have a brightspark between the screw and stud each time contact is broken,which, by prolonging the current, increases the time occupiedin destroying the magnet, and thus diminishes the E.M.F. ofthe induced current. With a condenser the first effect of theextra… … Fig. 229. The Primary Coil (Fig. 229).—This is composed of a fewthicknesses of stout copper wire (£) surrounding a bundle ofsoft iron wires (A). The inner coil is connected with thebattery through the contact breaker. chap, vij Current Induction. 349 The Secondary Coil.—This (C) is coiled outside…
Electricity
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