That this heat possesses a peculiar chemical quality which is not 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 especially in rays analogous... On the Connection of the Physical Sciences - Page 237by Mary Somerville - 1846 - 460 pagesFull view - About this book
| Royal Society (Great Britain) - 1843 - 538 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) - 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 - 1846 - 496 pages
...spectrum. Sir John thence concludes — 1st. That it is the heat SEcT. XXV. CONCLUSIONS TO BE DRAWN. 233 of these rays, not their light, which operates the...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... | |
| Mary Somerville - 1849 - 568 pages
...by the purely calorific rays outside of the risible spectrum, though far more intense ; and, 3rdly. That the heat radiated from obscurely hot iron abounds...as in nature, but, by the application of heat, the colour is changed from blue to brown, from positive to negative ; even by keeping in darkness the blue... | |
| Encyclopaedia - 1851 - 276 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense; and, 3rdly, that the heat radiated from obscurely hot iron abounds...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 - 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 - 1853 - 492 pages
...original intensity. This curious change is not the effect of light, at least not of light alone. A cerium temperature must be attained, and that suffices in...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 - 1853 - 356 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and, 3rdly, 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... | |
| Robert Hunt - 1852 - 380 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... | |
| Robert Hunt - 1854 - 396 pages
...by the purely calorific rays outside of the visible spectrum, though far more intense ; and, 3rdly, 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... | |
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