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 224
supported in a horizontal position, with a singlearmature A fitted to vibrate horizontally betweenthem. When the battery connections are made withthe screw-cups on the baseboard, one of the magnetswill be charged, provided the break-piece is in sucha position with regard to the springs as to… … them, the movement of the break-piece interruptsthe current in the magnet, destroying its polarity,and then causes the current to be transmitted throughthe opposite one; this becomes charged in its turn,and attracts the iron bar, A, which imparts motionto the balance-wheel, W. By means of…
