...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...

...researches were carried on, at intervals at all events, till 1827, when he wrote, " The colors thus contributed by different objects to flame afford in...of detecting extremely minute quantities of them." Here we find spectrum analysis almost stated in terms, and yet, although Herschel, Brewster, and Fox...

...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...