Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 183
se of the poisedneedle, and is also repelled or < attracted by another magnetor solenoid, the polarity beingas explained £or a single con-volution, 1f 172. 176. Rules for Deter-mining Polarity of a Sole-noid.—Clasp the solenoid,or helix, in the right handso that the fingers pointaround it in the… … Fig. 148.—Ampere Frame Stand with Coils.The movable coils are poised on needle pointsand the terminals dip in concentricmercury cups. current around the coil when theclasp the coil with the right hand, so that ELECTROMA GXETISM. 165 OtftCTlOH OF N MAGNETIC FORCE t the thumb outstretched at right…
Electricity · Magnetism
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