A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 196
me time puttingpieces of caustic potassa, P P PP, into them. Thebands become wider and change their shape, until, whena perfect void is obtained, they disappear. Materialparticles seem to be necessary to the transfer of thecurrent, as in the case of the Voltaic arc. By inclosinga variety of… … of color may be obtained. These are called Geisslerstubes. THERMO-ELECTRICITY. If we take a bar of antimony, a, Fig. 159, and one ofbismuth, 6, and, having soldered them end Fig. 159.to end at c, pass a feeble current throughthem in a direction from the antimony tothe bismuth, the temperature of…
Chemistry · Physics
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