The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 344
ter.When adjusted the magnetic needle hangs as shown in the cut,Fig. 219, without any tendency to turn towards either curved polepiece. If all iron parts are symmetrical and of similar metal, a cur-rent through the coils will make no difference. It will work inmagnetic opposition upon the two arms,… … Fig. 220. Pole Pieces, Magnetic Needle and Mirror of Magnetic Bridge. curved arms will differ, and the magnetic needle will turn one wayor the other. In practical use different samples of iron are sub-stituted for the unwound members of the fourth side of the parallel-ogram, and the needle by its…
Electricity
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