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 322
stand; oneof these is connected with the band which sustainsthe glass mercury cup, C. To the second screv/-cup is soldered one end of the coarse wire coil, theother extremity of which is connected with the bandupon which the brass cup, B, also intended to holdmercury, is fixed. A bent wire, W,… … approaches nearly the end of the enclosed bundle ofiron wires. 502. When the connections are made with thebattery, the current traverses the w^ire, W, and theinner helix, causing the iron wires to become-mag-netic. They now attract the end of the iron rod,R; the motion of the rod raises the bent…
