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 287
s unnecessary. 437. Magneto-Electric Machine.—In the in-strument represented in Fig. 173, an armature, benttwice at right angles, is made to revolve rapidly, infront of the poles of a compound steel magnet of theU form. The U-magnet, whose north pole is seenat N, is fixed in a horizontal position,… … the pillar P to a small pillar between the poles of themagnet. Each of its legs is enclosed in a helix offine insulated wire. The upper part of the pillar Pslides over the lower part, and can be fastened in anyposition by a binding screw. In this way the bandconnecting the two wheels may be…
