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 223
ther magnet. The brass bar is con-nected with one extremity of a horizontal beam, th?other end of which communicates motion by meansof a crank to a fly-wheel. On the axis of the fly-wheel at B is the break-piece. Each magnet beingcharged in succession, the armatures are attractedalternately,… … 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…
