Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 135
orm thus: (a.) -f attracts —. (b.) + repels {d.) — attracts +. (c.) — repels etc. etc. Experiment 84.—Magnetize a number of fine sewing-needles bydrawing the 4- end of a bar magnet three or four times from the eye to the point of each.Cut several smallcorks into slicesabout an eighth ofan inch… … Fig. 2IO. each other and they mutually repel + end downward, over the needles; sides. Similarly, bring the — end over them ; they will be attracted toward the centre. 4:39. Laws of Magnets.—(1.) Every magnet MAGNETISM. 305 has two similar poles; like poles repel each other;unlike poles attract each…
Electricity · Magnetism
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