Bui. 1 26, U. S. Dept. of Agriculture. 



Plate IV. 



Fig. 1.— Covering Used for Canal and Method of Heating when Concrete 

 Lining was being Constructed, North Side Twin Falls Land & Water Co., 

 Milner, Idaho. 



Fig. 2.— Outside View of Covering Used for Canal when Concrete Lining 

 was being Constructed, North Side Twin Falls Land & Water Co., Milner, 

 Idaho. 



