97 
Production of Rhythm in Plants. 
curvature remains unchanged between 10.37 and 10.39, but 
owing to the rotation of the axis what was a downward 
becomes an upward curvature. 
This is clearly shown in the diagram (Fig. n), which gives 
Fig. ii. 
a graphic representation of Exp. I. Fig. 11 and all similar 
diagrams are to be read from below. The diagram is divided 
by a series of horizontal lines which indicate the moments 
at which the klinostat axis rotates ; the spaces between the 
lines are the periods , beginning below with Period 97. Time 
H 
