A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 423
spectrum of Tebbutts comet of 1881, is the usual one.The other two are unique. Brorsens comet, at its later returns, showed theordinary comet spectrum, and it might perhaps be considered possible thatan error was made in fixing the position of the bands at the first observa-tion. But the peculiar… … m Fig. 198. — Coiuet Spectra. (For convenience in engraving, the dark lines of the solar spectrum in the lowest strip of thefigure are represented as bright.) gave the usual spectrum; so that in this case it hardly seems possible thatthe anomalous result can be a mistake, though the spectrum itself…
Astronomy
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