Transactions of the Royal Society of Edinburgh . w Trails . Ray. Sac. E&mT STEPS in SPECTROSCOPY according to INCREASING TEMPERATURE, AS SHOWN by the NUMBER, INTENSITY, and SPECTRU M-PLACE of all KNOWN LINES, RESPECTIVELY. Plate 25000 30|000 W& Edinb-or^ J Trans. Roy. Soc. Edrrr* Vol. XXIX, Plate III.

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