TWINING OF TENDRILS 295 



I give below a record given by h tendril of Cucurhltd 

 in response to unilateral contact of short duration (Fig. 10')). 

 Successive <lots in the record are at intervals of three 

 seconds. The latent period was ten seconds, and the maxi- 



FKt. lOo. — Positive curvature of tendril of Cucwbita under unilateral stimulus of 



contact at x . 



muui curvature was attained in the course of two and a 

 half minutes. The curvature persisted for a further period 

 of two minutes after which recovery was completed in the 

 course of 12 minutes. Feeble stimulation is attended by 

 a recovery within a short period, but under strong stimulus 

 the induced curvature becomes more persistent. 



INHIBITORY ACTION OF STIMULUS. 



1 liave referred to the ren»»rkable observation of Fitting 

 that thou>^h the application, of ^riiuulus on the upper side 



24 



