...When the spectrum is made to act on paper which has been previouslydarkened, by exposure to sunshine under cupro-sulphate of ammonia, thephenomena are materially different... 
Henry H. Snelling 「The History and Practice of the Art of Photography」
...Paper prepared with this salt, blackens over its whole extent withnearly equal intensity, when submitted to the prismatic spectrum...
Henry H. Snelling 「The History and Practice of the Art of Photography」
...) The greatest amount of white lightis at C; the yellow contains less of the chemical power than any otherportion of the solar spectrum...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...The shift of the spectrum linescan't be accounted for by distortion through space alone...
Various 「Astounding Stories, March, 1931」
...A great flash of the colors of the spectrum sent Parker reeling back...
Various 「Astounding Stories of Super-Science, November, 1930」
...The fine, crisscrossing wires disappeared, and in their stead was color, every color in the spectrum...
Anthony Gilmore 「The Affair of the Brains」
...Now let us approach Arcturus, Capella, Aldebaran: these are yellow starswith golden rays, like our Sun, and the vapor of iron, of sodium, and ofmany other metals can be identified in their spectrum...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...In the spectrum of Jupiter, for instance, we are awareof the action of an unknown substance that manifests itself by a markedabsorption of certain red rays...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...And in thesolar spectrum itself, many of the lines have not yet been identifiedwith terrestrial substances...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...But Frauenhofer found with a narrow slit, wellfocussed by the lens, that some colours were missing in the white light of thesun, and these were shown by dark lines across the spectrum...
George Forbes 「History of Astronomy」
...If sodium orcommon salt be thrown on the colourless flame of a spirit lamp, it gives it ayellow colour, and its spectrum is a bright yellow line agreeing in positionwith line D of the solar spectrum...
George Forbes 「History of Astronomy」
...In 1868 Huggins compared the spectrum of Winnecke’scomet with that of a Geissler tube containing olefiant gas, and found exactagreement...
George Forbes 「History of Astronomy」
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