Abstract
WITH reference to the question raised by Mr. H. N. Draper in NATURE, vol. xliv. p. 446, as to the practical superiority of an alum solution over simple water in absorbing such radiations as are chiefly instrumental in producing heat, I may recall some experiments made by myself five years ago (Brit. Assoc. Report, 1886, p. 309). The source of radiation employed was a paraffin lamp with a glass chimney, the various solutions were contained in a glass cell with parallel sides, and the “radiometer” was a delicate thermopile, the face of which was blackened with camphor smoke. The following results, among others, were obtained:—
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BIDWELL, S. Alum Solution. Nature 44, 565 (1891). https://doi.org/10.1038/044565d0
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DOI: https://doi.org/10.1038/044565d0
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