Note on the Chromosphere Spectrum

Details Note on the Chromosphere Spectrum Note on the Chromosphere Spectrum

Nov 1891

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1891natur..45...28y&link_type=abstract

Nature, Volume 45, Issue 1150, pp. 28 (1891).

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Scientific paper

WITH the new spectroscope of the Halsted Observatory, which has a 5-inch Rowland grating of 20,000 lines to the inch, I have repeatedly observed of late that the bright chromosphere line, Angström 6676.9 (No. 2 in my catalogue of chromosphere lines), is not coincident with the corresponding dark line of the solar spectrum, but is less refrangible by about one-third of a unit of Rowland's scale. This chromosphere line, therefore, can no longer be ascribed to iron, but must be due to some other substance as yet undetermined.

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