THE APPLICATION OF QUANTITATIVE STIMULUS 41 



complete. Every response in this series starts, therefore, 

 from a position of equilibrium, and the height of each single 

 response increases with increasing stimulation. In the 

 second case, however, the molecular derangement consequent 

 on stimulation is not completely removed after any single 



30 



30 



20 



15 



fb) 



10 



FIG. 31. Responses to Increasing Stimulus obtained with Two Specimens 

 of Stalk of Cauliflower 



In (a) recovery is complete, in (b) it is incomplete. 



stimulus of the series. That the recovery is only partial is 

 seen in the gradual shifting of the base-line upwards. In 

 the former case the base-line had been horizontal, represent- 

 ing a condition of complete equilibrium. Now, however, the 

 base-line, or line of modified equilibrium, is tilted upwards. 

 Thus, even here, if we measure the heights of successive 



