Plate XII 



Fig-. 20. Evaporation rates at the middle of both the northwest (4) and the 

 southeast (6) facing- slopes of the most mesophytic portion of the ravine. Sta- 

 tions 4 and 0. 



Fig-. 21 Evaporation rates near the top of both nor Invest (5) and southeast (7) 

 facing slopes of the ravine, the oak uplands (16), and the open uplands (17). Sta- 

 tions 5, 7, 16 and 17 



