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 121
ountedby a brass cup, A, and its lowerend dips into a small mercurycup on the horizontal portionof the magnet. From this part projects a bent wire,which dips into a circular cistern of mercury, openin the centre, to allow the magnet to pass through,and supported independently of it. A wire,… … REVOLVING MAGNET. 105 its middle, whence it is conveyed oif in such a direc-tion as not to act upon the lower pole. On makingconnection with the battery, the magnet will revolverapidly around the wire ; the direction of the rotationdepending upon that of the current. 167. Magnet revolving on its…
