Bui, 376, U. S. Dept. of Agriculture. 



Plate XI. 



Fig. 1.— Pipes from Surge Tank to Power House. 



Right-hand pipe held at constant velocity. ISHoot pipe in distance. (No. 52. 



FiQ. 2.— An Example of Twin Line Ccngtruction. 



Fig. 3.— Winter Flow is Retarded by Slush Ice. 

 Note rings for grating removed to prevent ice accumulation. 



