Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 429
tem con-sists of an aluminum strip,ad, carrying two discs, B, C\to the backs of which arefastened pieces of magnetized watch spring, ns and »V, theupper pair having their poles opposite to those of the lowerpair. Such a system, provided the magnets are all alike andin the same plane, would be… … Fig. 258. SJENSITI YE GAL YAXOME TERS. 419 fiber, so that the discs hang in the centers of two coils, I)and E, wound in opposite directions. The face of one ofthese discs, B, carries a silvered mirror, and the deflectionof the needle may be read with a telescope and scale. Thevibrations are damped…
Physics
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