﻿l62 



BOTANICAL GAZETTE 



[march 



ascribed the greater evolution of CO3 from the former to imper- 

 fect distribution of the ZnSO.. 



January lo. To test 



M 



16000 



TABLE IV. 

 ZnSO,. Double-distilled water in experiment bottje, tap 



water in control. Results in cc. N. per hour. 



Time 



10 

 12 



2 



37-12:38 



8- 2 : 08 

 08- 3 : 26 



1 

 o 



Experiment 



3:26 



3 : 26 

 4:50 



5:50 



8:33 

 10 : 03 



M 



16000 



ZnSO 



4:50 

 5:50 



8:33 

 10:03 



12:03 



(14 hours) 





0.027 

 0.027 

 0.027 



in both bot 



0.023 

 0.027 

 0.027 

 0.021 

 0.028 



Control 



0.027 



0.027 

 0.023 



ties. 



0.043 



0.035 

 0.030 



0.027 



0.028 



The conclusion from this experiment is that 

 exerts no appreciable stimulation. 



M 



16000 



ZnSO 



We shall now take up the experiments with more concen 



trated ZnSO^. 



TABLE V. 



December 30. Test of 



M 



1143 



ZnSO^. 



Time 



1 1 : 4O' 



12 :40- 



1 ;46- 



2 : 46 



2 : 46- 



3:46- 



4:46- 



5:46- 



12 : 40 



1 : 46 



2 : 46 



3:46 

 4:46 



5:46 

 7:46 



M 



1143 



Control 



0.023 

 0.027 

 0.025 



exp. bottle 



o 





 o 

 



025 

 025 

 025 

 025 



In the remaining experiments the control will be omitted 

 from the report, when it is a mere list of uniform figures. 



