72 



THE PHYSIOLOGY OF STOMATA. 



Experiments 75 to 79, inclusive — August 10-11, 1904 (fig. 27). 

 Experiments 75 and 76 remained in the sunlight till 2 p. m., when the sky 

 became overcast. Placed in the dark room at Q h i8 m a. m., on August 11; 

 replaced in the light at 9^25™ a. m. 



10p.m. 12 2a.m. 4 6 8 10 



Fig. 27. — Curves for experiments 75 to 79 inclusive. Fouquieria splendcns. 



Experiments 77, 78, and 79 remained in the diffused light of the labora- 

 tory till 1 1 a. m., August n, and then placed in the dark room. 



In table 41 only hourly rates are given, in centimeters of tube length. 



