78 



PLATE III 



Flow recorder installation in Coldwater Canyon: above, 7-d.ay 

 chart on clock-driven drum; below, spiral cam which permits a 

 direct record on the chart in units of discharge. 



r 



^ 



B. Site of experimental station at Isleta, N. Mex. , showing type 

 of surrounding vegetation. Consumptive use of water by sedge 

 was determined in the small area fenced at the extreme right. 



