Abstract
IN spectroscopic literature there are many casual references to a continuous background in the vacuum tube spectra of various gases, such as oxygen, chlorine, etc. Usually these observations appear to have been confined to the visible region, and I can recall no comments on continuous spectra in the ultraviolet except in the case of hydrogen. Schniederjost (Zt. f. Wiss. Phot., 1904, p. 265) and Friederichs (Bonn Diss., 1905) observed such a spectrum at low pressures, which extended to a wave-length of about 2100. The latter attempted to use the uncondensed discharge through a small capillary tube at about 2 mm. pressure as a source for the photography of absorption spectra, but found that the results were unsatisfactory, even with exposures varying from twelve to twenty-four hours.
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LEWIS, E. The Continuous Spectra of Gases. Nature 95, 394–395 (1915). https://doi.org/10.1038/095394c0
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DOI: https://doi.org/10.1038/095394c0
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