Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
o thatof the contact end of the magnet,which will cause the extremitiesof the magnetized bar to have likepoles with each other, but oppo-site to that of the centre, as shownby the letters. 620. Figure 47.—Induc-tion without contact.—Everymagnet is surrounded by a sphereof magnetic influence, called… … Fig. 47.
Physics · Astronomy
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