﻿164 



BOTANICAL GAZETTE 



[march 



In the experiments with ^z. TZZ^ ^^^ Tzz i^ ^^^^ 10-15 mm 



50' 100 



200 



iites before the precipitation of BaCOg was apparent; then it 

 became very rapid at once. 



The bare end-results of some experiments at higher tempera- 



r 



tures will be sufficient. 



TABLE IX. 



December 13. Test of 



M 



100 



ZnS04 at 37.5^ C 



Time 



Experiment 



Remarks 



2 : 12~-X : 12 

 3: 12 



3 : 12-4 ; 12 



Total COa 



M 



100 



0.060 



ZnSO^ in 



0.800 

 0.925 



exp, bottle. 

 Including excess COg from exp. bottle 





The plants were put into water and remained alive. 



TABLE X. 



December 12. Test of 



200 



ZnSO^ at 37^ C 



Time 



10 : 05-2 : II 



2 : II 



2 : 1 1-3 : II 

 Total CO2 



Experiment 



200 



O.0S8 



ZnSO^ in exp, bottle. 



0,815 

 1. 315 



TABLE XL 



December 9. Test of 



M 



500 



ZnSO^ at 39.5' C 



Time 



Experiment 



2 : 05-4 : 05 

 4:0s 



4 : 05-5 : 00 



5 : 00-6 : 2iO 



M 



500 



0,087 



ZnS04 in exp. bottle 



0.743 

 0.627 



