CHAPTER XXII 



DIURNAL MOVEMENTS OF PLANTS RENDERED ANISOTROPIC 



BY GRAVITY 



Facts were given in the previous chapter which seemed to 

 indicate that one of the factors in the diurnal movement 



Fig. 137. Diurnal curve of movement of procumbent young stem 



of Mimosa pudica. 



Successive dots at intervals of 15 minutes. 



of the Palm under variation of temperature is the pre- 

 vious induction of anisotropy by the stimulus of gravity. 

 The question next arises whether these movements are 



