Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 272
of deflection. It is a magneticneedle suspended in a brass frame. 889. I. Place the instrument in themagnetic meridian, and connect the+ pole of a battery with the southend, and the — with the north end, so that the current shall pass above the needle. The north pole of the needle now turns to the… … GALVANOMETERS. 263 III. Pass the current from north to south above theneedle, and the north pole of the needle again moves east. IV. Pass the current from north to south below theneedle, and the north pole again moves west. 890. The direction of the deflection can always be deter-mined by…
Physics
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