Bui. 376, 
U. S. Dept. of 
Agriculture. 
Plate XI. 
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Fig. 1.— Pipes from Surge Tank to Power House. 
Right-hand pipe held at constant velocity. 13|-foot pipe in distance. (No. 52.) 
Fig. 2.— An Example of Twin Line Construction. 
Fig. 3.— Winter Flow is Retarded by Slush Ice. 
Note rings for grating removed to prevent ice accumulation. 
