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 301
gnetic induction, thus correspond to analogous ideas.204. Magnetic Screens.—If a hollow block of iron be placedin a magnetic field, the perturbation of the lines by the iron issuch as to make the field within the cavity less intense than theundisturbed field. In the case of a hollow cylinder placed… … Fig. 177. plane of the paper) is supposed constant. The reciprocal of theirdistance apart at any place is therefore a measure of the intensityof induction there. The figure represents the case where the per-meability is 100. It will be seen that the two dotted lines of in-duction which lie close to…
Electricity · Magnetism
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