Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 280
earth, and quitebeyond the measuring power of a com-pass needle. A galvanometer on a plandue to Professor James Clerk Maxwell,employs a permanent magnet, or an elec-tro-magnet, which is stationary, betweenthe poles of which may freely turn a coilbearing the current to be measured. Thiscurrent in… … Suspended coil with D, soft iron core. N, S, magnetic poles. 232 MEASUREMENT of magnetic force on the vertical sides of the coil, a piece of softiron, D, is fixed between the poles of the magnet. This iron be-comes magnetized by induction, so as to produce a very powerfulfield of force, in the…
Inventions · Inventors
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