Bui. 126, U. S. Dept. of Agriculture. 
Plate I. 
Fig. 1.— Santa Ana Canal near Orange, Cal. 
(Showing moss and mineral accumulation on wetted surface.) 
Fig. 2.— By-pass Chute, Orland Project, U. S. Reclamation 
Service, Orland, Cal. 
(From a photograph furnished by A. N. Burch. project manager.) 
