 John thence concludes — 1st. That it is the heat of these rays, not their light, which operates the change ; 2ndly. That this heat possesses a peculiar chemical quality which is not possessed by the purely calorific rays outside of the visible spectrum,...  On the Connexion of the Physical Sciences - Page 267by Mary Somerville - 1849 - 524 pagesFull view - About this book
 | Royal Society (Great Britain) - Electronic journals - 1843 - 540 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and thirdly, that the heat radiated from obscurely hot iron abounds...analogous to those of the region of the spectrum above described. The author then describes the photographic properties he has discovered to belong to mercury,... | |
 | Royal Society (Great Britain) - Electronic journals - 1843 - 552 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and thirdly, that the heat radiated from obscurely hot iron abounds especially in rays analogous to th'tse of the region of the spectrum above described. The author then describes the photographic properties... | |
 | Mary Somerville - Science - 1846 - 496 pages
...possessed by the purely calorific rays outside of the visible spectrum, though far more intense; and, 3dly. That the heat radiated from obscurely hot iron, abounds...as in nature, but by the application of heat, the color is changed from blue to brown, from positive to negative; even by keeping in darkness the blue... | |
 | Mary Somerville - Physical sciences - 1846 - 496 pages
...by the purely ciilorific rays outside of the visible spectrum, though far more intense ; and, 3dly. That the heat radiated from obscurely hot iron, abounds...the lights and shadows are the same as in nature, bnt by the application of heat, the color i* changed from blue to brown, from positive to negative... | |
 | Mary Somerville - Physical sciences - 1846 - 496 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and, 3dly. That the heat radiated from obscurely hot iron, abounds...positive, that is, the lights and shadows are the game as in nature, bat by the application of heat, the color is changed from blue to brown, from positive... | |
 | Encyclopaedia - 1851 - 276 pages
...peculiar chemical quality which is not possessed by the purely calorific rays outside of the visible spectrum, though far more intense; and, 3rdly, that...those of the region of the spectrum above indicated." I have proved this fact with a great number of preparations of cobalt, nickel, bismuth, platinum, and... | |
 | Robert Hunt - Daguerreotype - 1852 - 324 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and, Srdly, that the heat radiated from obscurely hot iron abounds...those of the region of the spectrum above indicated." Sir John Herschel then proceeds to show that whatever be the state of the iron in the double salts... | |
 | Mary Somerville - Science - 1853 - 492 pages
...possessed by the purely calorific rays outside of the visible spectrum, though far more intense; and, 3dly. That the heat radiated from obscurely hot iron, abounds...white ground and positive, that is, the lights and sl.adows are the same as in nature, but by the application of heat, the color is changed from blue... | |
 | Robert Hunt - Calotype - 1853 - 356 pages
...peculiar chemical quality which is not possessed by the purely calorific rays outside of the visible spectrum, though far more intense ; and, 3rdly, that...those of the region of the spectrum above indicated." Sir John Herschel then proceeds to show that whatever be the state of the iron in the double salts... | |
 | Robert Hunt - Calotype - 1852 - 378 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and, Srdly, that the heat radiated from obscurely hot iron abounds...especially in rays analogous to those of the region of fihe spectrum above indicated." Sir John Herschel then proceeds to sho'w that whatever he the state... | |
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