Bui. 194, U. S. Dept. of Agriculture. 
Plate XVIII. 
Fig. 1.— Capurro Ditch, Nevada. 
(No. 241— Downstream from Station 1.) 
Fig. 2.— Roller Canal, Louisiana. 
(No. 245 — Showing meter station.) 
Fig. 3.— Reno Ditch, Nevada. 
(No. 254 — Downstream from Station 0.) 
