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" The pure earths , when violently heated, as has recently been practised by Lieutenant Drummond, by directing on small spheres of them the flames of several spirit-lamps, urged by oxygen gas, yield from their surfaces lights of extraordinary splendour,... "
Annalen der Physik und Chemie - Page 87
1863
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Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ...

Henry Enfield Roscoe - 1873 - 542 pages
...peculiar definite rays in excess which characterize the tints of flames coloured by them ; so that there can be no doubt that these tints arise from the molecules of the colouring matter, reduced to vapour and in a state of violent ignition." Talbot says: : " The flame of sulphur and nitre contains a red ray...
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Gesammelte Abhandlungen

Gustav Kirchhoff - 1882 - 641 pages
...from their surfaces lights of extraordinary splendour, which, when examined by prismatic analysis, are found to possess the peculiar definite rays in...coloured by them, so that can be no doubt that these tiuts arise from the molecules of the colouring matter reduced to vapour, and held in a state of violent...
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