68 



THK PHYSIOLOGY OF STOMATA. 



-**•- 4 M 



2 M 



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



Fig. 22. — Curves for experiments 62, 63, and 64. Fouquieria splendens. s, curve of stomatal condition. 



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



Fig. 23. — Curves for experiments 58, 59, and 60. Fouquieria splendens. 



Experiments 65 and 66. — July 18, 19, 1904 (fig. 24). The curve of 65 is normal throughout; 

 66 was placed in dark room at 1 i h i5 m and replaced in light at 1 i h 25 m , 10 minutes later. 

 Readings in tube-lengths reduced to hourly rates. 



Table 39. — Rate of transpiration. 



Readings taken at — 



8 p. m. 



9 p.m. 



10 p. m. 



11 p. m. 

 1 a. m. 

 3 a. m. 



5 a. m. 



6 a. m. 



7 a. m. 



8 a. m. 



9 a. m. 



Readings taken at — 



10 a. m 



11 a. m 



n h i5 m a. m.. 

 n h 25 m a. m.. 



12 day 



1 p. m 



2 p. m 



3 P-m 



4P-m 



5 P-m 



Experiment. 



65 



Tem- 

 pera- 

 ture 



.CO. 



6.9 



" 5 



9 



6 



7 

 5 



7 



7 



6 



33 



