The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 219
, for a fewminutes at a time, when the gasesand vapors, which generally lie low(mainly in the interstices of theclouds which constitute the photo-sphere), and below its upper surface,are elevated for the time being by some eruptive action.For the most part, the lines which appear only at suchtimes… … ASTRONOMY. I99 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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