Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 505
Fig. 304. 482 GALVANOMETERS [360 … Fig. 305. The effect of the earth may be compensated by that of a magnetwhich produces in the place occupied by the needle a sensibly uni-form field in the opposite direction to that ofthe earth. This magnet, which is called thecompensating or adjusting magnet, is usually^-^ supported on a rod…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
