382 



ECONOMIC OPERATION OF CREAMERY 



Burning Wood or Coal. In some localities this question is 

 of minor importance, as conditions may be such that .coal only 

 can be used. In other sections, where both are obtainable, it 

 is of great importance. The following table 1 shows figures 

 obtained at five factories in Wisconsin where soft coal was burned 

 and five others where wood was used. 



DAILY FUEL USED AT SEVERAL CREAMERIES 



These are the best obtainable figures of comparison under 

 creamery conditions. 



If wood is burned the dryness of it is an important considera- 

 tion. If the wood is wet its power of producing heat is greatly 

 lessened, as a certain amount of heat is used in evaporating the 

 water in the wood. Air-dry wood will contain from 12 per cent 

 to 25 per cent water. The quality of coal is another variable 

 factor. In general, and from the table which follows, it might be 

 said that 2 J pounds of wood are equal to i pound of lump coal. 



1 Farrington in Hoard's Dairyman. 



