3io 



BOTANICAL GAZETTE 



[APRIL 



TABLE VIII 



f 



Growth and structure of Scirpus validus: culms i and 2 grown at atmospheric 



pressure: culms % and 4 grown at 20-4.0 mm. pressure 



Culm no. Region 



3 

 4 



3 

 4 



3 



4 



3 



4 



1 

 2 



3 

 4 



10 

 10 

 10 

 10 



10- 

 10- 

 10- 



30 



65 

 65 



65 



30 



30 



30 

 30 



65 

 65 

 65 

 65 



105 

 105 



105 

 105 



105-130 

 105-130 

 105-130 

 105-130 



Diameter 



in MM. 



0.885 

 0.895 

 0.910 

 1. 010 



1.260 



1-775 

 1-545 

 I-550 



1.450 

 1.830 



1 .910 



i .800 



.600 



1 



2.000 



2 



2 



-155 

 .050 



1.940 



2-255 

 1-875 



Walls in mm. 



Outer 



O.14 

 O.II 

 O.II 

 O.08 



O.17 

 O.14 



O.I3 

 O.14 



O.18 



O.I5 

 O.14 



O.13 



0.14 

 O.I2 



O.I5 

 0-I3 



013 

 0-I5 



O.II 



Spaces 



Inner 



Large 



O.05 



3 



O.04 



4 



0.05 



2 



O.05 



4 



O.03 



4 



O.04 



4 



O.05 

 O.06 



4 

 5 



O.09 

 0.06 



4 

 12 



O.05 



4 



O.05 



5 



O.06 



4 

 16 



O.07 



4 



O.09 



5 



O.05 

 O.08 



18 

 4 



O.07 



II 



Small 



5 



5 

 2 



6 



4 

 9 



7 

 11 



8 



9 



8 



14 



8 

 10 



15 

 16 



10 



15 

 12 



Diaphragm 

 distance 



IN MM. 



I.63O 

 O.085 

 2.I70 

 3.IOO 



I-7SO 

 2.I50 



3.4OO 



2.950 



2.320 

 2.030 

 2.980 

 3.I80 



2.3OO 

 3.270 

 3.480 



Growth 



(mm. per 



hour) 



0.48 



0-37 

 0.24 



0.68 



o.55 

 0.49 



0.83 



o-57 

 0.47 



0.83 

 0.95 



* Culm 2'grew no mm., before the experiment, under practically the same conditions as the control ; 

 the measurements are used with this fact in mind. 



TABLE IX 



Increase in diaphragm distance 



mm 



Region 



30 



30- 65 



65-105 



105-130 



No. 3 over no. 1 



O 



I 



o 



54 



65 

 66 



No. 3 over no. 2 



2.085 

 I.250 

 O.950 

 O.970 



No. 4 over no. 2 



3-OI5 



o . 800 



1. 150 



1. 180 



This experiment 



EXPERIME 



experiments 1 and 2, except for the pressure 



kept between 60 and 80 mm. of mercury, 

 discontinued on March a because the culms 



experiment 



top of the jars. 



the end of the experiment the 



