CA LORI PIC POWER OF FUELS. 



pletely, owing to being enclosed in the ash and consequently 

 shut off from access of air. This is especially the case with 

 those ashes which are easily fuzed by the heat of the fire. 

 Ashes containing carbonates are much more easily fuzed than 

 those containing phosphates or sulphates. On this account a 

 chemical analysis of the ash is at times quite desirable. 



Some difference in evaporation is noticed in using the dif- 

 ferent sizes of coal, more particularly with the fine sizes. 

 With the proper arrangements for burning fires a good yield 

 is obtained, but with the ordinary grates the yield is much 

 lower. 



