A popular history of astronomy during the nineteenth century (1902)
Clerke, Agnes M. (Agnes Mary), 1842-1907 · London, A. and C. Black · leaf 368
was, however, a condition sine qua non for the exhibitionof the cometary type of spectrum. When a continuous current was 1 Astr. Nach., No. 1,488. 2 Annuaire, Paris, 1883, p. 185. 3 Phil. Trans., vol. clviii., p. 556. 4 Hasselberg, Mem. de VAc. Imp. de St. Petersbcwrg, t. xxviii. (7th ser.), No.… … GrRExYT Comet. Photographed, May.,. 1901, with.the thirteen-inch Astrographic Refractor ol theRoyal (Observatory, Ca] f Good H ope. chap, x RECENT COMETS 343 employed, the carbonic oxide bands asserted themselves to theexclusion of the hydro-carbons. The distinction has great signifi-cance as…
Astronomy
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