Plate XI 



Fig-. 18. Evaporation rates at bottom (3) and near the top of the northwest (5) 

 and the southeast-facing (7) slopes of the ravine. Stations 3, 5, and 7 



Fig. 19. Evaporation rates at foot of the northwest facing slope (3), and 

 middle (6) ana top (7) of the southeast-facing slope of the most niesophytic 

 portion of the ravine. Stations 3, b, and 7 



