Abstract
WHILST mapping down, in preparation for the coming eclipse, all the bright lines that have so far been observed and accurately measured in the chromosphere or solar prominences, I was struck with the absence of a faint yellow line, which I have myself several times observed whilst examining the contour of the sun's disc. This line is probably identical with Angström's absorption line 5883.0 (spectre normal du soleil), D″ lying almost midway between D' and the line in question. There is no danger of mistaking it for the bright yellow line seen in every solar prominence, and lying near Angström 5865.1, since the two yellow lines were seen on each occasion at the same time on the more refrangible side of D″.
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PERRY, S. The Chromosphere. Nature 3, 67 (1870). https://doi.org/10.1038/003067b0
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DOI: https://doi.org/10.1038/003067b0
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