 | 1828 - 450 pages
...fluid which appeared to possess every requisite I could desire. Its index being nearly the same as that of the best flint glass, with a dispersive power more than double, perfectly colourless, beautifully transparent, and, although very expansible, possessing the same,... | |
 | 1829 - 424 pages
...Mr. Barlow was led after many experiments to select sulphuret of carbon, which has a refractive index about equal to that of the best flint glass with a dispersive power more than double. " Perfectly colourless, beautifully transparent, and possessing the same optical properties, when hermetically... | |
 | Denison Olmsted - 1835 - 374 pages
...employed for this purpose was the sulphuret of carbon, a limpid fluid prepared from sulphur and charcoal.f It is singularly adapted to optical purposes, having...transparent, and, although it is very volatile, yet when * It is said that, as a general rule, Achromatic Telescopes are priced in the ratio of the cube of... | |
 | Denison Olmsted - 1842 - 384 pages
...prepared fronveulphur and charcoal. It is singularly adapted to optical purposes, having a refracting power about equal to that of the best flint glass,...should the experiments finally succeed as well as it is expected, are the following : 2. It enables us to increase the aperture of the telescope to a... | |
 | Thomas Dick - 1845 - 644 pages
...to be a substance which possessed every requisite he could desire. Its index is nearly the same as that of the best flint glass, with a dispersive power more than double. It is perfectly colourless, beautifully transparent, and although very expansible, possesses the same,... | |
 | Thomas Dick - 1845 - 608 pages
...to be a substance which possessed every requisite he could desire. Its index is nearly the same as that of the best flint glass, with a dispersive power more than double. It is perfectly colourless, beautifully transparent, and although very expansible, possesses the same,... | |
 | Denison Olmsted - 1846 - 454 pages
...prepared from sulphur and charcoal. It is singularly adapted to optical purposes, having a refracting power about equal to that of the best flint glass,...should the experiments finally succeed as well as it is expected, are the following : 1. It renders us independent of flint glass, 2. It enables us to... | |
 | Thomas Dick - 1850 - 586 pages
...to be a substance which possessed every requisito he could desire. Its index is nearly the same ne that of the best flint glass, with a dispersive power more than double. It is perfectly colourless, beautifully transparent, and, although ver}' expansible, possesses the... | |
 | Royal Society (Great Britain) - 1828 - 490 pages
...claim a preference, and to possess nearly every requisite I could desire ; having a refractive index about equal to that of the best flint glass, with a dispersive power more than double, perfectly colourless, beautifully transparent, and, although very expansible, possessing the same,... | |
 | 1830 - 470 pages
...purpose. This appeared to him, to possess every requisite he could desire ; " having a refractive index about equal to that of the best flint glass, with a dispersive power more than double, perfectly colorless, beautifully transparent, and, although very expansible, possesing the same, or... | |
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It is singularly adapted to optical purposes, having a refracting power about equal to that of the best flint glass, with a dispersive power more than double that of the same substance. It is, moreover, perfectly colorless, beautifully transparent, and... 