The book of philosophical experiments, illustrating the principal facts and curious phenomena of electricity, galvanism, magnetism, optics, chemistry, heat, etc., with introductory observations of each science, and upwards of 300 experiments (1839)
Dalton, J. S. (John S.) · New York : [s.n.] · leaf 34
d. HEAT OF THE COLORS OF THE SPECTRUM. 244. The heating powers of the rays of thesolar spectrum arc found to be of different de-grees. If the bulb of an air thermometer bemoved in succession through the differently-col-ored rays, it will be found to indicate the greatestheat in the red rays ; next… … out of the confines of the red rays, but with thebulb still in the line of the spectrum, it rises evenhigher than in the red rays, and continues to risetill removed half an inch beyond the extremityof the red ray. In this situation, quite out of thevisible light, the thermometer has been known…
Physics
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