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 206
zed by drawing them from the bend to theextremities across the poles of the U-electro-magnet,in such a way that both halves of the bar may passat the same time over the poles to which they areapplied. This should be repeated several times,recollecting always to draw the bar in the samedirection.… … cat^.s the direction in which the motion should takeplace. Of course, the result will be the same, ifthe steel bar is kept stationary, and the poles of 190 DAVISS MANUAL.. the electro-magnet are passed over it in the re-verse direction. 304. In order to remove the magnetism of a steelmagnet of the…
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