7o 



THE PHYSIOLOGY OF STOMATA. 



10a.m. 12 



2a.m. 4 



Fig. 26.— Curve for experiment 83. Fouquieria splendens. The short curve shows the response 

 when the piece was placed for a brief interval in the light between 9 and 10 a. m. 



Table 40. — Rates of transpiration. 



In all cases an early morning maximum was developed at 6 o'clock, except 

 in No. 82, in which the maximum falls at 5 o'clock. The rates commence to 

 increase at about 1 a. m. 



Experiment 151, 1905. 

 The early morning maximum was attained at 4 o'clock and the rate 

 remained constant till 7 o'clock, after which it fell off till 3 p. m. (see fig. 18). 



