ii LIFE MOVEMENTS IN PLANTS 



XXV.— TROPIC CURVATURE WITH TRANSVERSE TRANSMISSION 

 OF EFFECT OF STIMULUS. 



PAGE, 



Turgor variation under transverse transmission oE stimulus- 

 effect — Tropic responses of pulvinated and growing- 

 origans to unilateral tcimulatinn — Direct unilateral stimu- 

 lation — Indirect unilateral stimulation — Dillerence of 

 effects induced by Direct and Indirect stimulation — Laws 

 of tropic curvature ....... 279 



XXVL— MECHANOTROPISM : TWINING OF TENDRILS. 



Anomalies of mechanotropism — Effects of indirect and 

 direct electric stimulation on growtli of tendril — Effect 

 of direct and indirect meclianical stimulus — Immediate 

 and after-effect of stimulus — Inhibitory action of 

 stimulus — Response of less excitable side of the 

 tendril — Relative intensities of responses of upper and 

 under sides of tendril of Passiflora — Negative curvature 

 of tendril 288 



XXVIL— ON GALVANOTROPISM. 



Polar eff(3cts of electric current on growth — Effect of 



anode and cathode on growth ..... 301 



XXVIII.— ON THERMONASTIC PHENOMENA. 



Effect of temperature — Different thermonastic organs — Two 

 types of response : Positive and Negative — Effect of 

 rise of temperature and of stimulus on thermonastic 

 organs — Law of thermonastic reaction .... 305 



