and the Economy of Fuel. 



The wood used as fuel in the following experiment 

 was pine moderately dried. The billets were 6 inohes 

 long, and from i to 2 inches in diameter. 



The following table shows the results of five experi- 

 ments that were made with this boiler by myself, just 

 after it was fitted up : 



Without stopping to make any observations on the 

 results of these experiments (though they afford matter 

 for several of an interesting nature), I shall proceed to 

 give a brief account of another set of experiments, on 

 a much larger scale, which were made in the copper 

 boiler of a brewery belonging to the Elector. 



