of Rhythm in Plants. 251 
Here in Exp. Ill we get movements in direction A and B 
in the following proportions : A, 46' ; B, 23' ; A, 37' ; B, 23', 
showing a very irregular rhythmic movement. 
Exp. IV. May 31, 1888. 
p. 
Minutes. 
Movement. 
I 
28 
D 
II 
13 
17 
D 
— ? 
III 
28 
U 
IV 
IO 
15 
D 
U 
V 
7 
16 
5 
D 
U 
D 
VI 
1 
26 
D 
U 
VII 
3 
18 
9 
D 
U 
? 
I 
i 
} 
A = 38' 
B= 22' 
A = 1 6' 
B= 3 2' 
In Exp. IV we see an irregular curving backwards and 
forwards of the shoot. It will be noticed that the record is 
not an easy one to interpret ; thus the three minutes of down- 
ward curvature with which Period 7 begins might be supposed 
to be part of the B curvature with which Period 6 ends. 
It may, however, represent a physical sinking or sag, in which 
case it would have had to be added to the 18' in the middle 
of Period 7. 
