Abstract
V. Classification into Species. WE are now in a position to apply all that has gone before in a summarized statement of the various spectral changes, including those connected with hydrogen, which take place not only in these objects studied by Dunér, but in those others to which I have referred as forming the true beginning of the group.
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Suggestions on the Classification of the Various Species of Heavenly Bodies 1 . Nature 38, 56–60 (1888). https://doi.org/10.1038/038056d0
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DOI: https://doi.org/10.1038/038056d0