284 RESEARCHES ON IRRITABILITY OF PLANTS 



second arm of the lever. The effect of this was by exerting 

 a tension to hasten recovery, and thus oppose the complete 

 closure of the leaflet. 



I then took records of responses of Biophytum to quan- 



Fig. 134. — Response of Biophytum leaflet to stimuli *i, -5, 

 1, and 2. Response is seen to be multiple with the last. 



Fig. 135. — Multiple response in Biophytum under a single 

 strong electric shock. 



titative stimuli of increasing intensity, the stimuli being 

 applied at intervals of 3 minutes (fig. 134). The successive 

 stimuli were of intensities -i, -5, 1, and 2. Owing to incom- 

 plete recovery during the intervening resting-intervals, 



