A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 95
e centre of the yellow. The prismatic spectrum in-duces the supposition that heat is produced by slowerand longer vibrations than those of light, but the inter-ference spectrum corrects this hypothesis, and showsthat they coexist in the same place at the same time,and are probably one and the same… … At M is a stand for the source of heat, with a concavemirror for concentrating the rays; at N, a perforatedscreen; at P, a plate of the substance to be examined;at T, a thermo-electric pile; at G, a galvanometer. Sis an unperforated screen that can be turned down, outof the way. What is the…
Chemistry · Physics
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