and the Economy of Fuel. 



73 



The result of this interesting experiment was as fol- 

 lows : 



These experiments were made on the yth of Novem- 

 ber, 1 794. On repeating them the next day with pine- 

 wood, which had not been previously dried in an oven, 

 the result was as follows : 



Experiments Nos. 9 and 10. 



The first remark I shall make on the results of these 

 experiments is the proof they afford, by comparing them 

 with that which preceded them (No. 6), of the important 

 fact that pine-wood affords more heat in its combustion 

 than beech. This fact is the more extraordinary, as it 

 is directly contrary to the opinion generally entertained 

 on that subject ; and it is the more important, as the price 

 of pine-wood is in most places only about half as high 



