420 On the Heat developed in Combustion 



which is developed, we should be better able to form 

 conjectures as to the state of the water, if it be at all 

 times found in this inflammable liquid. 



The results of the experiments which I made with 

 alcohol are less regular than those of the experiments 

 made with water, as might have been expected ; but they 

 have nevertheless been sufficiently uniform to establish 

 a fact which will be regarded, without doubt, as very 

 curious and important. 



As the vapour which is extracted from spirit of wine 

 when boiled, varies a little with the intensity of the fire 

 used in boiling it, I took care to note the time which 

 was taken in every experiment, in order to be able to 

 judge, by comparing the quantity of vapour condensed 

 with the time employed to form it, of the intensity of 

 the heat employed to boil the liquid. 



In the following table we shall see the details and 

 results of five experiments made on the same day 

 (January 21, 1812) with alcohol of different degrees of 

 strength. The capacity of the calorimeter was always 

 equal to that of 2781 grammes of water, and the ther- 

 mometer employed was that of Fahrenheit. 



