3 o8 



BOTANICAL GAZETTE 



[APRIL 



results obtained. In fig. 3 



in 



pressure curve at 



(February 7) was due to the fact that the pinch-cocks were 

 ►pen for a short time during watering. The second peak 



Growth 



TABLE VI * 



structure of Scirpus validus: CULMS I and 2 GROWN at atmospheric 



pressure; culms 3 and 4 grown at 10-20 mm. pressure 







Diameter 



Walls in mm. 



Spaces 



1 

 Diaphragm 



distance 



IN MM. 



Growth 



(mm. per 



hour) 



Culm no. 



Region in mm. 



Outer 



Inner 



Large 



Small 



T 



45-71 

 45-71 

 45-71 

 45-71 



71-100 

 71-100 

 71-100 

 71-100 



100-124 

 100-124 

 100-124 

 100-124 



124-175 

 124-175 

 124-175 

















3 



4 



T 



2.00 



O.168 



O.050 



4 



6 



2.36 



051 



1. 57 



O.I34 



O.054 



4 



8 



3-92 



0.32 



2 



3 



4 



1 . . 



1.89 

 2.25 



1.58 



0.156 

 0.103 

 0.119 



O.050 

 O.060 

 O.052 



4 

 15 



7 



10 



9 

 9 



2.55 

 350 

 405 



0.85 



0.53 

 0.49 



2 



3 



4 



1 



• 



2 



3 



215 

 2.38 



1-73 



2.50 

 2.25 



2.50 



0.108 

 0.150 

 O.103 



0.050 

 O.128 

 0.113 



O.050 

 O.050 

 O.090 



O.065 

 O.070 

 O.O90 



7 



15 

 12 



17 



7 

 16 



8 



7 

 7 



16 



9 



7 



3.19 



5.60 



6.08 



373 

 5.18 



i-35 

 0.21 



i-39 

 0.36 





Increasi 



TABLE VII 



S IN DIAPHRAGM DI 



t 



STANCE IN MM. 









Region 





] 



So. 4 over n 



0. 2 



8 



fo. 3 over 



no. 2 







45-71 

 71-IC 



IOO-I2 



I 24-I J 



■ 





n cfi 











>o 





I -50 

 O.71 



o.95 

 2.41 



I.AC 









»4 









r<s 





















cannot be definitely accounted for by the data at hand. It is 

 very probable that in these two cases, as well as in two others, 

 an adjustment was made at once, but there are no records of the 

 fact, such as occur later. The dotted line, therefore, is probably 

 the more correct one. 



