DIURNAL MOVEMENT OP .MIMOSA 



577 



ago do not differ in any way from those obtained this year. 

 The record may conveniently be divided into four phases. 



Fig. 210. — Diurnal record of AAmota in summer, and in winter. Leaf rises 

 from 2 to 5 p.m., when there is a spasmodic fall. Leaf re-erects itself from it p.m. 

 to- 6 a.m. after which there is a gradual fall till 2 p.m. with pulsations. The 

 upjjer-most record gives temperature variation, up-curve representing fall of 

 temperature and vice veml. 



First phase. — The leaf erects itself after the thermal- 

 noon up to or 5-30 p.m. The temperature, it should be 

 remembered, is undergoing a fall during this period. 



