538 Account of Experiments 



have been found by experiment to contain different 

 quantities of absolute heat, or, in other words, to re- 

 quire different quantities of heat to heat equal quan- 

 tities or weights of them to any given temperature, or 

 any given number of degrees, it will be necessary to 

 determine how much of each of these ingredients is 

 employed in forming any given quantity of dough. 



Now, in the foregoing experiments, as 1 102 loaves of 

 bread were formed of 1736 Ibs. of rye-meal, it appears 

 that there must have been i -jVo Ib. of the meal in each 

 loaf; and, as these loaves weighed i\ Ibs. each when 

 they were put into the oven, each of them must, in a 

 state of dough, have been composed of i^V? Ib. of rye- 

 meal and lyiftj- Ib. of water. 



Supposing these loaves to have been at the tempera- 

 ture of 55 of Fahrenheit's thermometer when they 

 were put into the oven, the heat necessary to heat one 

 of them to the temperature of 212, or the point of boil- 

 ing water, may be thus computed. 



By an experiment, of which I intend hereafter to give 

 an account to the public, I found that 20 Ibs. of ice-cold 

 water might be made to boil with the heat generated 

 in the combustion of i Ib. of dry pine-wood, such as 

 was used in baking the bread in the six experiments 

 before mentioned. Now, if 20 Ibs. of water may be 

 heated 180 degrees (namely, from 32 to 212) by the 

 heat generated in the combustion of i Ib. of wood, 

 ITOTF Ib. of water may be heated 157 degrees (from 

 55, or temperate, to 212) with loooou of a pound of 

 the wood. 



Suppose now that the rye-meal contained the same 

 quantity of absolute heat as water, as the quantity of 

 meal in each loaf was i -fifa Ib., it appears that this quan- 



