 | 1866 - 924 pages
...carbon, and arrived at the extraordinary result that a quantity of dissolved iodine sufficiently opaque to cut off the light of the mid-day sun was, within...mirror, silvered in front, the rays emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
 | 1865 - 388 pages
...carbon, and arrived at »he extraordinary result that a quantity of dissolved iodine sufficiently opaque to cut off the light of the mid-day sun was, within...mirror, silvered in front, the rays, emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
 | 1865 - 372 pages
...quantity of dissolved iodine sufficiently opaque to cut'olFtbe light of the mid-day sun was, within tiie limits of experiment, absolutely transparent to invisible...mirror, silvered in front, the rays, emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
 | 1865 - 400 pages
...After several trials the author found that a solution of iodine in bisulphid of carbon, so opake as to cut off the light of the midday sun, was, within...absolutely transparent to invisible radiant heat. When the rays from the electric lamp were concentrated into a cone by means of a small glass mirror... | |
 | 1865 - 846 pages
...After several trials the author found that a solution of iodine in bisulphid of carbon, so opake as to cut off the light of the midday sun, was, within...absolutely transparent to invisible radiant heat. When the rays from the electric lamp were concentrated into a cone by means of a small glass mirror... | |
 | Royal Institution of Great Britain - 1866 - 730 pages
...glass in thin layers had a greeuish hue : I have since found black glass ,,ir more diathermic. — JT the mid-day sun was, within the limits of experiment,...Concentrating by a small glass mirror, silvered in front, the rayti emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing... | |
 | 1867 - 844 pages
...the extraordinary result that a quantity of dissolved iodine sufficiently opaque to out off the lignt of the mid-day sun was, within the limits of experiment,...mirror, silvered in front, the rays emitted by the carbon points of the electric lamp, we obtain a Convergent cone of light. Interposing in the path of... | |
 | John Henry Pepper - 1869 - 722 pages
...arrived at the extraordinary result, that a quantity of dissolved iodine sufficiently opaque to cut-off the light of the mid-day sun was, within the limits...mirror, silvered in front, the rays emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
 | 1865 - 372 pages
...carbon, and arrived at the extraordinary result that a quantity of dissolved iodine sufficiently opaque to cut off the light of the mid-day sun was, within...mirror, silvered in front, the rays, emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
 | John Henry Pepper - 1877 - 764 pages
...carbon, and arrived at the extraordinary result, that a quantity of dissolved iodine sufficiently opaque to cut off the light of the mid-day sun was, within...mirror, silvered in front, the rays emitted by the carbon points of the electric lamp, we obtain a convergent cone of light. Interposing in the path of... | |
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... to cut off the light of the mid-day sun was, within the limits of experiment, absolutely transparent to invisible radiant heat. This then is the substance by which the invisible rays of the electric light may be almost perfectly detached from the... 
