| J. B. Hearnshaw - 1990 - 554 pages
...Sir John Herschel (1792-1871). He wrote in 1823: The colours thus communicated by the different bases to flame afford, in many cases, a ready and neat way...of detecting extremely minute quantities of them' (3). Herschel was therefore one of the first to suggest that flame colours could be used for chemical... | |
| Michael J. Crowe - 1994 - 468 pages
...with various metallic salts, stated: "The colours thus communicated by the different bases to flames afford, in many cases, a ready and neat way of detecting extremely minute quantities of them. . . ." By 1828 Josef Fraunhofer had published papers in which he ( 1 ) described over 500 dark lines... | |
| John Holmes Agnew, Walter Hilliard Bidwell - 1871 - 828 pages
...these researches were carried on, at intervals at all events, till 1827, when he wrote, " The colors thus contributed by different objects to flame afford...of detecting extremely minute quantities of them." Here we find spectrum analysis almost stated in terms, and yet, although Herschel, Brewster, and Fox... | |
| 1863 - 1212 pages
...put (in powder) into the wick of a spiritlamp The colours thus communicated by the different bases to flame afford in many cases a ready and neat way of detecting extremely minute quantities of them The pure earths, when violently heated, as has recently been practised by Lieat. Drummond, by directing... | |
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