Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 219
the base ofthe chromosphere is very complicated,consisting of hundreds of bright lines.The majority of the lines, however,are seen only occasionally, for a fewminutes at a time, when the gasesand vapors, which generally lie low(mainly in the interstices of theclouds which constitute the… … ASTRONOMY. 199 of the ordinary solar spectrum. But the selection of thelines seems most capricious : one is taken, and another left,though belonging to the same element, of equal intensity,and close beside the first. Some of the main lines of thechromosphere and prominences are shown in Fig. 215.…
Astronomy
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