..."mechanical equivalent of heat," and from which we learn that the amount of heat which is necessary to raise the temperature of a pound of water one degree of the centrigrade scale, is equivalent to the mechanical force which would lift the same pound of water to...

...applied in the condensation of the air capable of raising 795 Ibs. to the height of one foot in order to raise the temperature of a pound of water one degree of Fahrenheit's scale. In another experiment, when the air condensed in one vessel was allowed to pass...

...explained the meaning of this great governing principle stands Joule, the worthy successor of Dalton. ' Mr. Joule has proved that the quantity of heat requisite...expended in percussion, friction, or raising a weight, n. definite quantity of heat is generated ; and conversely, when work is performed by the consumption...

...found that one pound of matter, falling seven hundred and seventy-two feet, will produce heat enough to raise the temperature of a pound of water one degree of Fahrenheit. This is now received as the unit of force. 5. Force is indestructible. It is never increased...

...Helmholtz, Him, Eegnault, &c., establish that a calorie is equivalent to 425 kilogrammeters, that is to say that the quantity of heat requisite to raise the temperature of a kilogram of water to 1 degree centigrade produces a mechanical action represented by the elevation...

...same ratio that it does up to that temperature, it would be about 0'26 at 1650°, so that in this case the quantity of heat requisite to raise the temperature of a pound of iron to that extent above 16° — the average atmospheric temperature — would be 424'84 heat unite....

...which had disappeared will reappear without increase or diminution. Thus, the amount of heat which will raise the temperature of a pound of water one degree of the thermometer will, if expended, say in the expansion of steam, lift a weight of 772 pounds one foot,...

...which had disappeared will reappear, without increase or diminution. Thus the amount of heat which will raise the temperature of a pound of water one degree of the thermometer, will, if expended, say in the expansion of steam, lift a weight of 772 pounds one foot,...

...which had disappeared will reappear, without increase or diminution. Thus the amount of heat which will raise the temperature of a pound of water one degree of the thermometer, will, if expended, say in the expansion of steam, lift a weight of 772 pounds oue foot,...

...had disappeared will reappear, without increase or diminution. Thus, the amount of heat which will raise the temperature of a pound of water one degree of the thermometer, will, if expended, say in the expansion of steam, lift a weight of 772 i>ounds one foot,...