PLANT RESPONSE 79 

Before 4 After 
Fic. 48.—Srimunatinc ACTION OF VERY DILUTE KOH 

Before 4 After 
Fie. 49.—Nearny covpehere ABOLITION OF RESPONSE BY STRONG KOH 
The two vertical lines are galvanometer deflections due to ‘1 volt, before 
after the application of ré agent. 
remains unchanged. 
and 
It will be noticed that the total resistance 
