 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, which, when examined by prismatic analysis, are found to possess the peculiar definite...  Once a Week - Page 9edited by - 1870Full view - About this book
 | Richard Anthony Proctor - 1871 - 550 pages
...spectra of the vapours of different elements. ' The pure earths,' he said, ' when violently heated, yield from their surfaces lights of extraordinary splendour,...possess the peculiar definite rays in excess which characterise the tints of the flames coloured by them ; so that there can be no doubt that these tints... | |
 | Henry Enfield Roscoe - 1873 - 542 pages
...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,...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... | |
 | Henry Enfield Roscoe - 1873 - 552 pages
...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,...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... | |
 | sir Henry Enfield Roscoe - 1873 - 550 pages
...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,...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... | |
 | 1878 - 720 pages
...bright coloured bands only. In 1822, Herschel said :— " The pure earths, when violently heated, yield from their surfaces lights of extraordinary splendour,...there can be no doubt that these tints arise from molecules of colouring matter reduced to vapour ; and held in л state of violent ignition." He suggested... | |
 | Graeme Mercer Adam, George Stewart - 1878 - 726 pages
...coloured bands only. In 1822, Herschel said: — "The pure earths, when violentlyheated, yield fro;n their surfaces lights of extraordinary splendour,...there can be no doubt that these tints arise from molecules of colouring matter reduced to vapour ; and held in a state of violent ignition." He suggested... | |
 | Gustav Kirchhoff - 1882 - 832 pages
...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,...possess the peculiar definite rays in excess which characterise the tints of flames coloured by them, so that can be no doubt that these tiuts arise from... | |
 | Sir Arthur Schuster, Sir Arthur Everett Shipley - 1917 - 396 pages
...many cases, a ready and neat way of detecting extremely minute quantities of them," and " no doubt these tints arise from the molecules of the colouring...reduced to vapour, and held in a state of violent motion." Fox Talbot in 1826 looked at the red lights occasionally used to illuminate the stage in theatres.... | |
 | 1862 - 670 pages
...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,...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... | |
 | 1863 - 1212 pages
...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,...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... | |
| |
