Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 292
n) sometimes appear. There seem to becases, also, in which different bands replace the ordinary 276 COMETS. [§ 386 hydrocarbon bands, and the spectrum of Holmess comet of1892 was purely continuous. Mr. Lockyer maintains that asa regular thing the spectrum of a comet changes with itschanging… … Fig. 93. —Head of Donatis Comet, Oct. 5,1858. (Bond.) The spectrum makes it almost certain that hydrocarbon gases arepresent in considerable quantity, and that these gases are somehowrendered luminous ; not probably by any general heating, for there isno reason to think that the general temperature…
Astronomy · Constellations
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