 | 1871 - 808 oldal
...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... | |
 | 1871 - 792 oldal
...flames, and these researches were carried on, at intervals at all events, till 1827, when he wrote : "The colours thus contributed by different objects...of detecting extremely minute quantities of them." Here we find spectrum analysis almost stated in terms, and yet, although Herschel, Brewster, and Fox... | |
 | Encyclopaedia - 1845 - 876 oldal
...it is obtained, and its identity at all times. The colours thus communicated by the different base« to flame, afford in many cases a ready and neat way of detecting extremely minute quantities of them ; but this rather belongs to Chemistry than to our present subject. The pure earths, when violently... | |
 | Sir William Crookes, George Wharton Simpson - 1860 - 858 oldal
...its identity at all times. The colours thus communicated by the different bases to Зяте afiord in many cases a ready and neat way of detecting extremely minute quantities of them ; but this rather belongs to chemistry than to our present subject. The pure earths, when violently... | |
 | 1862 - 328 oldal
...Hetrcpolilana, in the year 1817, Herschel says, — " The colours thus communicated by different bases to flame afford in many cases a ready and neat way...of detecting extremely minute quantities of them." But it is to Fox Talbot, a gentleman well-kno on to us as one of the first investigators of the beautiful... | |
 | William Allen Miller - 1863 - 618 oldal
...put in powder into the wick of a spirit-lamp. 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 analysis of the spectra of artificial lights was resumed by Fox Talbot in 1826, in vol. v. of Brewster's... | |
 | 1863 - 720 oldal
...powder into the wick of a spirit-lamp « . . . . » 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 Lieutenant Drummond,... | |
 | 1863 - 694 oldal
...powder into the wick of a spirit-lamp « . . . . » 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 Lieutenant Drummond,... | |
 | 1863 - 708 oldal
...powder into the wick of a spirit-lamp « .... « 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 Lieutenant Drummond,... | |
 | Edward Isidore Sears - 1865 - 858 oldal
...muriates succeed best from their volatility ;" " the colors thus communicated by the different bases to flame, afford in many cases a ready and neat way...of detecting extremely minute quantities of them." TalbotJ, in 1826, analysed the spectra of various artificial lights. He observed a constant yellow... | |
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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... 
