iqiq] 



WEAVER &- MOGENSEN— TRANSPIRATION 



419 



transplanted into appropriate sized containers directly from the 

 forest floor, without disturbing the root system. Care was taken 



Fig. 17. — Battery of Douglas firs and Engelmann spruces from which summer 

 transpiration losses were obtained. 



Fig. 18. — Battery of yellow pines and mountain maples used for determining 

 relative summer transpiration. 



not to select these species from too dense shade. Some of these 

 trees are shown in figs. 17 and 18. 



