TRANSMISSION OF IMPULSE 



119 



dots being at intervals of a second. The resulting responses 

 given in fig. 64 should be read from below upwards. 



S---- 



f-Sz 

 -•-Si 



r 



- -s 



Fig. 63. 



Fig. 64. 



Fig. G3. Longitudinal transmission of impulse in stem of 



Mimosa. 



Stimulus successively applied at s, s^ and s,. Transverse applica- 

 tion of stimulus indicated by S3. 



Fig. 64. Records of effect of longitudinal transmission of 

 impulse, to be read from below upwards. 



Positive, diphasic and negative response to stimulation at s 

 s, and So. Erectile response in this and m the follo^g 

 represented by a down-curve, responsive fall bemg mdicated 

 by an up-curve. Successive dots at intervals of a second. 



I first applied the stimulus S at a distance of 80 mm. ; 

 the transmitted impulse gave rise only to a positive erectile 

 movement of the leaf followed by partial recovery, there 

 being no negative response of the fall of the leaf. The 



