58 Dr Fyfe on the Prevention of Smoke^ SfC. 



The above table shews that, by the consumpt of each lb. 

 of coal, 10.75 lb. of water were evaporated from 170. Nu- 

 merous other trials were made in the same way, with other 

 kinds of Scotch coal, sometimes for the same, sometimes for a 

 shorter period, and with a pressure nearly the same, but occa- 

 sionally lower. The following are the results : — 



