XXll CONTENTS 



PAGE 



— EfEect of variation in the rate of ascent of sap — Effect of 

 irrigation with warm water — EfEect of plasmolytic withdrawal 

 of water — EfEect of lowering of temperature — Effect of rise of 

 temperature — The critical fatal temperature — Effect of poison — 

 EfEect of chloroform — EfEect of ether . . . . -375 



CHAPTER XXXV 



EFFECT OF DIFFUSE STIMULATION ON 

 AUTONOMOUS TORSION 



Response to electric stimulation — EfEect of strong stimulation : 

 retardation or actual reversal of torsion — EfEect of minimal 

 stimulation — Modifying effect of subtonicity — EfEect of indirect 

 stimulation — EfEect of thermal shock — EfEect of mechanical 

 stimulation — EfEect of direct stimulation by light — Effect of 

 indirect stimulation — EfEect of red and of blue light — EfEect of 

 geotropic stimulation on the erect and the inverted plant . 395 



CHAPTER XXXVI 



EFFECT OF UNILATERAL STIMULATION ON 

 AUTONOMOUS TORSION 



The numerous factors complicating torsional movement — Diurnal 

 variation of torsion — EfEect of unilateral stimulation by light 

 ■ — Unequal effect of light on the difEerent sides — No effect on 

 neutral sides (N, N'), but maximum effect, positive or negative, 

 on flanks (A, R) — ^Universal Laws of Torsional Response — 

 Torsional response of lhe pulvinated organ — -Torsional response of 

 the twisting stem— Effect of unilateral stimulation by gravity — 

 Unequal effects at difEerent sides — Combined effects of geotropic 

 and photic stimulation in concurrence or in opposition . . 406 



CHAPTER XXXVn 



GENERAL REVIEW 420 



INDEX 437 



