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 118
g in that below B,as these conspire in their influence. 160. Horizontal Galvanometer. — If the wireis carried many times around the needle, as in Fig.54, the power of the instrument is much increased,as each turn of the wire adds its influence ,* providedthe wire is not so long, or of so small a… … supported on a tripod stand, with leveUing screws; the ends, C and D, of the wires being connected with the screw cups, A and B. i^>. 55. 1^1- Upright Galvanometer.— In this instrument, represented inFig. 55, both the coil of wire andthe needle are placed in a verticalposition, the north pole…
