Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 337
netic poles,the field is vertical. Any great circle passing throughthe axis pp is a magnetic meridian.The declination at a point m (Fig.206) is the angle which the greatcircle, through this point and theaxis, makes with the geographicalmeridian. It varies from point topoint along the same meridian,… … Fig. 206. 246] GAUSSS THEORY 315 exactly north and soutli. This circle forms the periphery of Fig.206. On one side of this plane the north pole deflects towardsthe west, and the declination is westerly ; on the other side it isdeflected to the east, and the declination is easterly. The magnetic…
Electricity · Magnetism
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