 | John Pringle Nichol - 1860 - 942 Seiten
...exact equivalence, capable of easy statement, holds between tlicse heat motions, and ordinary motions. The amount of heat necessary to raise the temperature of one pound of water one Fahrenheit degree from 32°, is called the thermal unit, and this thermal unit is accompanied... | |
 | American Gas Light Association - 1903 - 678 Seiten
...temperature between 32° and 212°, that in general the British thermal unit may be safely taken as the amount of heat necessary to raise the temperature of one pound avoirdupois of pure water one degree Fahrenheit. Thus, we may say that to raise the temperature of... | |
 | Isaac Todhunter - 1877 - 450 Seiten
...we must select a unit of heat, which is also termed a thermal unit. Tims wo may_ take for this unit the amount of heat necessary to raise the temperature of one pound of water from 0° C. to 1° C.; or we may take for this unit tho amount of heat necessary to melt one... | |
 | Noah Webster - 1884 - 362 Seiten
...unit chosen for tho comparison or calculation of the quantity of heat. That most commonly employed Is the amount of heat necessary to raise the temperature of one pound of water one degree centigrade. In Franco the thermal unit in the rnlorie. ThCr'mal-ly, adv. Ina thermal... | |
 | Sturtevant, B. F., Co - 1896 - 184 Seiten
...condensation of that steam, reappear as available for heating. The standard unit of heat is equivalent to the amount of heat necessary to raise the temperature of one pound of water through one degree Fahrenheit at its point of greatest density. A heat unit is not to be confounded... | |
 | 1879 - 542 Seiten
...out, in the process of combustion, rather more than 14,000 British units of heat, each such unit being the amount of heat necessary to raise the temperature ] of one pound of water 1° Fahrenheit of j heat. To effect this combustion, 140 cubic feet of atmospheric air, weighing... | |
 | Angus Sinclair - 1890 - 448 Seiten
...necessary for the comprehension of combustion as ordinary weights and measures are for mercantile purposes. The amount of heat necessary to raise the temperature of one pound of water, at its greatest density, one degree Fahrenheit is called a heat-unit, or sometimes a thermal... | |
 | Isaac Sharpless, George Morris Philips - 1892 - 384 Seiten
...capable of doing a definite amount of work. (See Art. 20.) The English unit referred to in Art. 353 is the amount of heat necessary to raise the temperature of one pound of water one degree Fahrenheit. This unit has no other name. The " Calorie," derived from the Metric... | |
 | 1894 - 954 Seiten
...to raise that body one degree to the quantity required to raise an equal weight of water one degree. The amount of heat necessary to raise the temperature of one pound of cold water, i° F., is called a unit of heat. And when a weight of one pound falls through a distance... | |
 | Albert Edward Seaton - 1895 - 478 Seiten
...measured in units of heat or thermal units. The British thermal unit is the amount of heat required to raise the temperature of one pound of pure water one degree Fahrenheit when at or near its greatest density (39 1° F.). The Mechanical equivalent of heat is the number (772)... | |
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In defining the unit of heat it is necessary to specify the temperature of the water because the amount of heat necessary to raise the temperature of one pound of water through one degree varies slightly at different temperatures. 
