380 On the Heat developed in Combustion 



lent man, I sincerely wished to find in this comparison 

 a proof of the accuracy of my method, and at the same 

 time a confirmation of the estimates of M. Lavoisier. 



SECTION II. Experiments made with white Wax. 



The air of the room being at the temperature of 6 1 F., 

 2781 grammes of water, of the temperature of 56 F., 

 were put into the receiver of the calorimeter (including 

 the quantity of this liquor that represents the specific 

 heat of the instrument), and, a lighted wax taper having 

 been properly placed at the entrance of the worm, the calo- 

 rimeter was heated for 13 minutes and 26 seconds, when, 

 the thermometer announcing that the water had acquired 

 the temperature of 66 F., the taper was extinguished. 



As I took care to weigh the taper before it was lighted, 

 I found, by weighing it at the end of the experiment, 

 that 1.63 grammes of wax had been burned. 



To express the results of this experiment so as to ren- 

 der them obvious, and at the same time easy to be com- 

 pared with the results of other similar experiments, we 

 will see how much water of the temperature of melting 

 ice would have been made to boil, at the mean pressure 

 of the atmosphere, by the heat made apparent in the 

 combustion of the 1.63 grammes of wax burned. 



The distance on Fahrenheit's scale between the tem- 

 perature of melting ice and boiling water being 180, if 

 the burning of 1.63 grammes of wax were requisite to 

 raise the temperature of the water in the calorimeter 10, 

 the burning of 29.34 grammes would have been necessary 

 to raise it 180; and, if 29.34 grammes of wax could 

 furnish by combustion sufficient heat to raise the tem- 

 perature of 2781 grammes 180, a gramme of this 



