 | John Pringle Nichol - Physics - 1860 - 942 pages
...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... | |
 | Smithsonian Institution. Board of Regents - Discoveries in science - 1869 - 488 pages
...friction of cast-iron plates with one another 774.88 foot-pounds as the expendtnre of power which is necessary to raise the temperature of one pound of water 1° F. A not very different result was obtained by Joule when he compared the quantity of heat set free in... | |
 | United States. Congress. House - United States - 1869 - 516 pages
...friction of cast-iron plates with one another 774.88 foot-pounds as tlie expendturo of power which is necessary to raise the temperature of one pound of water 1° F. A not very different result wae obtained by Joule when he compared the quantity of heat set free in... | |
 | Henry Evers - Locomotives - 1873 - 168 pages
...graduated, to enable the observer to read off easily the change in temperature. 18. Unit of Heat. — A unit of heat is the amount of heat necessary to raise the temperature of a pound of water one degree. Suppose a pound of water to be raised from 10° C. to 20°C.,it has... | |
 | Henry Evers - Steam - 1873 - 176 pages
...graduated, to enable the observer to read off easily the change in temperature. 18. Unit of Heat. — A unit of heat is the amount of heat necessary to raise the temperature of a pound of water one degree. Suppose a pound of water to be raised from 10°C. to 20°C., it has... | |
 | American Gas Light Association - Gas - 1903 - 678 pages
...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 - Physics - 1877 - 450 pages
...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... | |
 | Thomas Newbigging - 1883 - 514 pages
...ditto. 1 Ib. of carbonic oxide, burning to carbonic acid, yields 4478 ditto. NOTE. — The standard unit of heat is the amount of heat necessary to raise the temperature of a pound of water 1° Fahr. As a rule, when firing with coke, cleaning off the fire bars once in... | |
 | Noah Webster - 1884 - 362 pages
...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... | |
 | Engineering - 1879 - 542 pages
...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 11 Ibs.,... | |
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The calorie is the amount of heat necessary to raise the temperature of one gram of water one degree centigrade. 
