248 CHAP. XXn. DIURNAL MOVEMENTS OF PLANTS 



abolished the loss of water by transpiration. Any periodic 

 movement due to change in the rate of transpiration must 

 now have come to an end. The record (lowest illustration, 

 fig. 142) shows that there was no such arrest of movement ; 



Fig. 143. Parallel record of a dia-geotropic leaf (Erythrina indica). 



1. Record of diurnal variation of temperature. 



2. Normal record of diurnal movement. 



3. Diurnal record of movement after abolition of transpiration. 



the vaselined tree executed the diurnal movement in much 

 the same way as under normal conditions ; and not only 

 on that day but even on the next day as well. 



Experiment 134. Periodic movement of leaf after aboli- 

 tion of transpiration. — A parallel experiment was carried out 

 with the dia-geotropic leaf of Erythrina indica (fig. 143). 

 The results are essentially the same as those with the stem 



