iul. 194, U. S. Dept. of Agriculture. 
Plate XI 
HL 91 
^ • JIM 
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Fig. 1 .—Crowley Canal, Louisiana. 
(No. 161 — Upstream from meter station.) 
Fig. 2.— Santa Ana and Orange Canal, California, Just after Cleaning. 
(No. 172— Upstream from Station 10.) 
Fig. 3.— Central Main Canal, Imperial Valley, California. 
(No. 173— Downstream. Portable rating car over Station 0.) 
