 | John Pringle Nichol - 1860 - 942 էջ
...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... | |
 | Isaac Todhunter - 1877 - 450 էջ
...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 էջ
...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 էջ
...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 էջ
...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 էջ
...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 էջ
...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 էջ
...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... | |
 | Iltyd I. Redwood - 1895 - 182 էջ
...BRITISH THERMAL UNIT. A British thermal unit is the standard unit of heat in this country, and represents the amount of heat necessary to raise the temperature of one pound weight of water one degree Fahrenheit — the temperature of the water being 32°; on the other hand,... | |
 | Sturtevant, B. F., Co - 1896 - 184 էջ
...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... | |
| |
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. 
