NORMAL STOMATAL MOVEMENT. 



T 



107 



Fig. 36. — Stomata, upper surface, secondary leaves of Fouquieria splendens, July 

 27-28, 1906. (Curve c, fig. 37.) 



3a.m. 6 9 12m. 3p.m. 6 9 



Fig. 37.— Curves of means in figs. 34, 35, and 36, with grand mean of same (d). 



Table 52a. — Sizes 0} stomatal openings under normal conditions. Tumamoc Hill, December 

 17-18, 1906. (Fig. 38.) Fouquieria splendens. Measurements in micra. 



4 h oo m 



5 00 



6 00 

 10 00 



4 00 



5 00 



6 00 



7 00 



8 00 



9 00 

 10 00 



1 30 

 3 00 



p. in 

 p. m, 

 p. m 

 p. m 

 a. m. 

 a. m. 

 a. m. 

 a. m. 

 a. m, 

 a. m. 

 a. m, 

 p. m 

 p. m 



1 to 4 

 o 6 



6(7) 



3(4) 



3 



3 



6 



7 

 9 

 7 

 6 



1 to 6 (7) 

 o 6 



o to 3 

 o 6 

 (o) 2 to 6 



3 to 6 

 o to 9 



o to 6 



o to 5 (6) 



Sundown. 



Sunrise. 



