204 



COMPARATIVE ELECTRO-PHYSIOLOGY 



Amaranth, and abolished the excitability of one of the two 

 contacts a lateral leaf by scalding. The electrical curve, 

 under a continuously rising temperature, was now taken in 

 the usual manner. The existing electro-motive difference 

 between living and injured contacts underwent the usual 



i 



i. 



i. 



57" 



FIG. 134. Record showing Inversion of Electric Curve (represented 

 by dotted line) and Simultaneous Reversal of Electric Response in 

 Stem of Amaranth 



4, indicates current of injury from injured to uninjured contact, which, 

 reaching a maximum, undergoes reversal at death-point. Normal 

 response up, also becomes reversed to down after death-point. 



increase, reaching a maximum at the death-point. Meanwhile 

 electrical responses to uniform vibrational stimuli were taken 

 at intervals a few degrees apart. It will be seen (fig. 134) 

 that the electrical inversion took place at 57 C, this 

 moderate lowering of the death-point being due, in all 

 probability, to the slight depression caused by scalding at 



