PLANT RESPONSE 



79 



Before -t- After 

 FIG. 48. STIMULATING ACTION OF VERY DILUTE KOH 



Before 



After 



FIG. 49. NEARLY COMPLETE ABOLITION OF RESPONSE BY STRONG KOH 



The two vertical lines are galvanometer deflections due to -1 volt, before and 

 after the application of reagent. It will be noticed that the total resistance 

 remains unchanged. 



