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" The heat transferred from one body to another by radiation is proportional to the difference of the fourth powers of the absolute temperatures of the two bodies. While this is strictly true only of the ideal "black bodies... "
A Study of Four Hundred Steaming Tests Made at the Fuel-testing Plant, St ... - Page 135
by Lester Paige Breckenridge - 1907 - 196 pages
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Bulletin of the United States Geological Survey

Geological Survey (U.S.) - Geology - 1907 - 212 pages
...extremely small hole were made in such a body, heat would be radiated through the hole in proportion to the difference of the fourth powers of the absolute temperatures of the black body and the surrounding objects. BOLTZMANN AND STEFAN'S LAW. See Stefan and Boltzmann's law....
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Principles of Physics: Designed for Use as a Textbook of General Physics

William Francis Magie - Physics - 1911 - 588 pages
...examination of the results, was able to state them in the law that the radiation was proportional to the difference of the fourth powers of the absolute temperatures of the thermometer and of the enclosing wall. Since by Prevost's law of exchanges (§ 254) each of these bodies...
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Bulletin, Issues 23-25

United States. Bureau of Mines - Mines and mineral resources - 1912 - 570 pages
...portion of the wall. The amount of heat passing across a given air space by radiation depends upon the difference of the fourth powers of the absolute temperatures of the surfaces inclosing the air space. The laws governing the rate of heat transmission by conduction and...
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Bulletin, Issues 18-21

Mines and mineral resources - 1912 - 572 pages
...energy (heat, for example) radiated from a black surface to a cooler black surface is proportional to the difference of the fourth powers of the absolute temperatures of the bodies. TEMPERATURE, ABSOLUTE. See Absolute temperature. TEMPERATURE GRADIENT. As used in this bulletin,...
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Marine and Naval Boilers

Frank Lyon, Alfred Walton Hinds - Steam-boilers, Marine - 1915 - 444 pages
...exposed to such radiant heat has been found to depend upon the condition of the surface of the body and the difference of the fourth powers of the absolute temperatures of the radiating and absorbing bodies. Black bodies absorb a relatively larger proportion of heat than bodies having surfaces...
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Bulletin, Issues 18-30

Engineering - 1917 - 594 pages
...of heat radiation is equal to the product of the three factors, coefficient of emission, area, and difference of the fourth powers of the absolute temperatures of the radiating body and of the black receiving surface: P = kA (T.1 - Tb') k = A (TV - Tb') In this manner values...
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Transactions of the American Institute of Mining, Metallurgical ..., Volume 53

American Institute of Mining, Metallurgical, and Petroleum Engineers, American Institute of Mining Engineers - Metallurgy - 1916 - 484 pages
...of electrical energy. The heat transferred from one body to another by radiation is proportional to the difference of the fourth powers of the absolute temperatures of the two bodies. While this is strictly true only of the ideal "black bodies," the variation is so small...
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Finding and Stopping Waste in Modern Boiler Rooms: A Reference Manual to Aid ...

H. S. B. W. Cochrane Corporation, Philadelphia - Steam power plants - 1918 - 286 pages
...the hot surfaces of the furnace and the angle of exposure to the cold surfaces of the boiler. (6) On the difference of the fourth powers of the absolute temperatures of the hot and cold surfaces. In any given steam generating apparatus, the first of the above conditions is...
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Methods of Measuring Temperature

Ezer Griffiths - Temperature - 1918 - 208 pages
...deflections varied inversely as the square of the distance. Since the quantity of radiation received varied as the difference of the fourth powers of the absolute temperatures of the radiator and receiver, it was necessary to vary the sensitivity of the bolometer in order to keep the...
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A Dictionary of Applied Physics: Mechanics, engineering, heat

Richard Glazebrook - Physics - 1922 - 1090 pages
...losses increase very rapidly with temperature difference, the loss being approximately proportional to the difference of the fourth powers of the absolute temperatures of the ?M and inner wall surface respectively — agreeably with Stefan's Law. He states also that radiation...
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