Abstract
DOUBLE Reversal of Lines in Chromosphere Spectrum.—The magnesium lines of the b group, and the two D-lines of sodium have been seen several times (first on June 5, 1880) doubly-reversed in the spectrum at the base of a prominence.
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YOUNG, C. Spectroscopic Notes, 1879–80 . Nature 23, 281–282 (1881). https://doi.org/10.1038/023281b0
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DOI: https://doi.org/10.1038/023281b0