BOILER TESTS. 



TABLE No. 7. 



* Increase. 



If we assume an evaporation of 11.00 pounds of water from 

 and at 212 degrees per pound of combustible for the perform- 

 ance of anthracite broken coal , which seems to be a result within 

 easy reach in good practice, and farther assume 11 per cent, for 

 an average percentage of ash in such coal, the above compari- 

 son will be applied to an evaporation of 9.79 pounds of water 

 from and at 212 degrees per pound of coal. The performance 

 of the various fuels, expressed in pounds of water evaporated 

 per pound of dry coal, will then be as follows : 



