in 



OF AUTOCATALYSIS 



259 



4 5 6 7 

 Time, in weeks 



10 II 



Fig. 79. Growth of sunflower-stem : observed and calculated curves. 

 From Reed and Holland. 



cms. 



250 



200 



150 



100 



50 



Weeks 1 



10 li 12 



Fig. 80. Growth of sunflower-stem : calculated (autocatalytic) curve. 

 After Reed and Holland. 



