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 138
ect-angular coil of wire, O(Fig. 71), being substitut-ed for the ring. The rota-tion is much more rapid inconsequence of the prox-imity of the rectangle tothe magnet, not only nearits poles, but throughoutthe greater part of itslength. By this means,the great speed of eight orten thousand… … 122 DAVIS S MANUAL. Fig. 72. connection ; these wires pass through the brass archsurmounting the U-magnet, but are insulated from it. 194. Revolving Galvanometer Needle.—Fig.72 represents an instrument of similar construction to the Upright Galvanometer(Fig. 55), except thai, a con-tinued…
