Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 227
forwards above the polesof an electro-magnet, M. Thearmature, when on one side, isattracted by the poles until itarrives directly over them. Asit reaches this position, the cir-cuit is broken by the break-piece, and the bar moves on bythe momentum it has acquired,for some distance. The circuitis… … REVOLVING ELEGTRO—MAGNET. 211 f\>. 145.
