Contributions to Molecular Physics in the Domain of Radiant Heat: A Series of Memoirs Published in the 'Philosophical Transactions' and 'Philosophical Magazine' with AdditionsD. Appleton, 1873 - 446 pàgines |
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Altres edicions - Mostra-ho tot
Contributions to Molecular Physics in the Domain of Radiant Heat: A Series ... John Tyndall Visualització completa - 1893 |
Contributions to Molecular Physics in the Domain of Radiant Heat: A Series ... John Tyndall Visualització completa - 1872 |
Contributions to Molecular Physics in the Domain of Radiant Heat: A Series ... John Tyndall Visualització completa - 1873 |
Frases i termes més freqüents
absorbed Absorption per 100 Acetic ether actinic action æther air-pump alcohol Amylene apparatus aqueous vapour atoms augmented beam Benzol bisulphide of carbon blue calorescence carbonic acid cell cent chamber chemical chloride Chloroform cloud colour column cube cubic inch Deflection Absorption degrees density diathermancy dry air dynamic radiation effect electric electric-light employed ethyl experimental tube experiments focus Formic ether galvanometer gases glass heat-rays hydrochloric acid hydrogen flame intercepted invisible Iodide of methyl iodine lamp lampblack layer light liquid luminous Measures Observed Calculated Melloni memoir mercury minutes moist air molecules needle nitric acid nitrite of amyl obtained olefiant gas opaque oxide oxygen particles passed perfectly placed plates of rock-salt plates of salt platinum spiral polarization precipitated Professor Magnus quantity radiant heat radiation source of heat spectrum substance sulphuric acid Sulphuric ether surface TABLE temperature thermo-electric pile thickness tion transmission transparent Unit-measure vibrating visible wire
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Pàgina 231 - But it cannot be doubted that the same effect would be produced by radiant heat of the same periods, provided the motion of the ether could be rendered sufficiently intense. The effect in principle is the same, whether we consider the platinum wire to be struck by a particle of aqueous vapour oscillating at a certain rate or by a particle of ether oscillating at the same rate. By plunging a platinum wire into a hydrogen flame we cause it to glow, and thus introduce shorter periods into the radiation....
Pàgina 413 - ... diffused in the air. The cylinder which contained the air through which the calorific rays passed was polished within, and the rays which struck the interior surface were reflected from it to the thermo-electric pile which measured the radiation. The following objection was raised : — You permit moist air to enter your cylinder ; a portion of this moisture is condensed as a liquid film upon the interior surface of your tube ; its reflective power is thereby diminished ; less heat therefore...
Pàgina 432 - Nothing could more perfectly illustrate that ' spiritual texture ' which Sir John Herschel ascribes to a comet than these actinic clouds. Indeed the experiments prove that matter of almost infinite tenuity is competent to shed forth light far more intense than that of the tails of comets.
Pàgina 411 - ... term atmosphere and the term radiation. It is well known that our atmosphere is mainly composed of the two elements oxygen and nitrogen. These elementary atoms may be figured as small spheres scattered thickly in the space which immediately surrounds the earth. They constitute about 99£ per cent, of the atmosphere.
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Pàgina 422 - Benzol, bisulphide of carbon, nitrite ofamyl, nitrite of butyl, iodide of allyl, iodide of isopropyl, and many other substances may be employed. I will take the nitrite of butyl as illustrative of the means adopted to secure the best result with reference to the present question. And here it may be mentioned that a vapour, which when alone, or mixed with air in the experimental tube, resists the action of light, or shows but a feeble result of this action, may...
Pàgina 258 - Nothing, I think, could more forcibly illustrate the special relationship which subsists between the optic nerve and the oscillating periods of luminous bodies. The nerve, like a musical string, responds to the periods with which it is in accordance, while it refuses to be excited by others of vastly greater energy which are not in unison with its own.