PI.ATE XIII 



Fig. 22. Evaporation rates at the foot (8), middle (9), and near the top (10) of 

 north-facing slope of ravine. Stations 8, 9, and 10. 



Fig. 23. Evaporation rates at the bottom (8) and near the top of the north (10) 

 and of the south (12) facing slopes of the ravine. Stations 8, 10, and 12. 



