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 63
esirable to have the dis-tance between the poles in the decomposing cell assmall as possible, as the current passes more easilyand the action is more rapid. Where, however,different colors are to be exhibited, the instrument represented in Fig. 31 maybe used with advantage.This is a U-shaped tube,… … ELECTRO — METALLURGY. 47 tube may be in two parts, cemented together intoa brass support or stand, with a porous diaphragm be-tween. When the experiment with sulphate of soda,<§. 6S, is tried with this instrument, three separatezones of color, blending into each other, are perceived.At the…
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