AND TRANSPIRATION OF TREES 131 



Explanation of Figures 

 Fig. I. 



Water Content of Popidiis trcmuloides and Popuhis grandidentata. 



(1) xerophytic, clear and cloudy 



(2) hydrophytic, clear and cloudy 



Fig. II. 



Temperature and Relative Humidity for Popuhis tremuloides and Populus 



grandidentata. 



(1) xerophytic, clear and cloudy 



(2) hydrophytic, clear and cloudy 



Fig. III-XXXII. 



Daily Water Content, Transpiration, Temperature and Relative Humidity. 



Fig. XXXIII. 



Average Daily Water Content, Transpiration, Temperature, and Relative Humid- 

 ity, Showing Seasonal Variation. 



B = Water Content of Fagus americana. 



W = Water Content of Hamamelis virginiana. 

 = Water Content of Quercus alba. 

 b = Transpiration of Fagus americana. 

 w = Transpiration of Hamamelis virginiana. 

 o = Transpiration of Quercus alba. 

 t= Temperature, 

 r.h. = Relative humidity. 

 In Fig. III-XXXII transpiration values are multiplied by 10, and increased 

 by 50. 



In Fig. XXXIII transpiration values are multiplied by 10 and increased by 70. 



