24 



TRANSPIRATION IN A DESERT PERENNIAL. 



were placed in the open and brought into the laboratory for weighings. The 

 wind velocity was high all the morning, remaining so without apparent 

 change until 2 o'clock, when it increased to at least 25 miles an hour. 



Table G. Transpiralion oj polled plant No. 1. Experimeid VI. Dale, April 13, 1911. 



Time. 



7'' 47" a.m. 



9 48 a.m. 



10 47 a.m. 



n 48 a.m. 



12 48 a.m. 



1 47 a.m. 



2 47 a.m. 



3 48 a.m. 



Temperature. ^^^_ 



o p 



72 ' 



78 



83.5 



84.5 



89 



88.5 



86 



80 



p. cl. 

 26 

 22 

 20 

 11 



9 



8 



8 



9 



10 11 12 1 



Fig. 



10. Graph for transpiration of potted plant No. 1. 

 Exp. VI. 



