1914] 



OTIS— TRANSPIRATION OF WATER PLANTS 



489 



almost 



instances. 



extreme limit was reached in most 



CHART XII. 



16 X 19 20 X 23 



1911. 



between 4 and 6 o'clock in the morning, when the temperature was 

 at its lowest point. Referring again to charts VTII-XIV, it will be 

 observed that periods of high humidity are accompanied by a low 



