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    Memorie della Società degli Spettroscopisti Italiani, January.—Note from Prof. Draper on photographing the spectra of Venus and α Lyræ; a 28-inch reflector and a 12-inch refractor are the instruments used, and an exposure of from ten to twenty minutes. In the photograph of the spectrum of α Lyræ bands or broad lines appear in the ultra-violet region totally different to anything in the solar spectrum.

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    Scientific Serials . Nature 16, 134 (1877) doi:10.1038/016134a0

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