Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 199
aller current will deflect it than whenFig. 166.— Single Coil Mirror-Reflecting or .-, ^„ ii . A- ,. c ■, , Direct Scale Astatic Galvanometer. the earth s directive force has to be overcome. This principle isused in increasing the sensibility of galvanometers. In Fig. 165,the galvanometer coil… … Fig. 167.—Connections of Double Coil Astatic Galvanometer. arranged so that the deflections may be read from the circular scale,or the instrument may be used as a mirror-reflecting galvanometer, bymeans of the small mirror attached to th. vertical fibre suspension.A controlling magnet is also…
Electricity · Magnetism
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