Abstract
IN the month of July, 1879, I published in the Reports of the Royal Berlin Academy of Sciences, some photographs of the spectra of Geissler tubes, filled with rarefied hydrogen. In these photographs are visible, besides the old well-known hydrogen lines, H, α, β, γ, δ, a great many other lines in the violet and ultra-violet at the extreme end, very thin and faint, but of a character very similar to the old well-known hydrogen lines. One of the most intense of these new lines coincided almost exactly with the H line (Fraunhofer) of the sun-spectrum.
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By Dr. H. W. Yogel, from the Photographic News of February 20.
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The New Hydrogen Lines Observed by Photography, the Star Lines, and the Dissociation of Calcium 1 . Nature 21, 410 (1880). https://doi.org/10.1038/021410a0
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DOI: https://doi.org/10.1038/021410a0