102 A. B. Ploioman — Electromotive Force in Plants. 



—1 















^-^"lOmin. 



20 30 40 

 Fig. 9. 



50 



60 



70 



• ' 





Lupinue albus . 









Codiaeum regalis . 



20 30 40 50 60 70 



Fig. 10. 



Reaction Currents. 



CodiaeulB regalis . 



Fig. 11. 

 Reaction current 



10 20 30 40 



60 70 



1Q 



id 



Fig. 12. 



~/* smm. 



I. 



3r 



T5" 



Reaction Currents . 

 Poinsettla. 



- w 



(2 hr.) 



