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 156
em-selves soon lose their magnetism. They should,therefore, be provided with armatures. Armaturesare pieces of soft iron placed in contact loith oppositepoles, as shown in Fig. 234. The two poles of themagnet (or magnets, for two bar magnets may bethus protected) act inductively upon the… … Fig. 234. 450. Magiietic Units,—All magnetic quantities, strength ofpoles, intensity of magnetization, etc., are expressed in terms ofspecial units derived from the fundamental units of length, mass andtime, i.e., they are C. Q-. S. units. {a) Unit Strength of Magnetic Pole.—The unit magnetic pole…
Electricity · Magnetism
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