Inquiries relative to the Structure of Wood. 483 



bonization of i pound of this wood, according to the 

 usual process, can only furnish by combustion a suffi- 

 cient quantity of heat to raise 11.521 pounds of water 

 180 F. ; and as the numbers 32.043 and 11.521 are 

 nearly in the proportion of 100 to 36, it should seem 

 that the loss of heat in question is about 64 per cent. 



One very important fact, which appears to be well 

 ascertained by the results of this inquiry, is, that all the 

 charcoal produced from the carbonization of 3 pounds 

 of any kind of wood scarcely gives more heat in its 

 combustion than would be furnished by i pound of the 

 same sort of wood burned, and in its natural state. 



[This paper is printed from Nicholson's Journal, XXXIV. (1813), 

 pp. 319-325, and XXXV., pp. 95-117.] 



