Bui 87, U. S. Dept. of Agriculture. 



Plate VI! 



Fig. 1.— A Flume in the Construction of which Small Round Timber was Used 

 for Everything Except the "Box." 





Fig. 2.— Crude Form of Flume Construction where only the Lining is of 

 Sawed Lumber, the Remainder being Constructed of Small Round Timber 

 and Poles. 



