MULTIPLE AND AUTOMATIC RESPONSE 285 



the base-line is seen to be shifted upwards. The ampHtude 

 of successive responses is about the same, though the 

 stimuU are increasing. At the application of the fourth 



Fig. 136. — Multiple response in Averrhoa under a single strong 

 electrical stimulus. Vertical marks below indicate time- 

 interval of I minute in this and in the following records. 



stimulus, of intensity 2, we find that the response becomes 

 multiple. Thus we see that while a single stimulus of 

 moderate intensity gives rise to a single response, a strong 



Fig. 137. — Multiple excitation in Biophytum under the 

 action of constant Hght. 



stimulus gives rise to a multiple series of responses. In 

 fig. 135 are depicted multiple responses in Biophytum to a 

 very strong electrical stimulus, there being four multiple 

 responses in the course of 6 minutes. In fig. 136 are 



