IX 



HEREDITY 



sequently, it is not surprising that the curve showing the 

 height of an F 2 at the end of the season exhibits continuous 

 variation from one extreme to the other, especially since 

 we have seen that the fluctuation in height is by no means 



.June 

 18th. 



July 16th, 



July 30th. 



August 27th. 



Sept. 10th. 



Sept. 24th. 



Oct. 10th. 



Fluctuation (pure ta I strain) Sept.24th. ^ . " x 



50 100 150cm. 



FIG. 58. HEIGHT OF STEM IN F 2 OF KING (o) by CHARARA (x). 

 Stunted and damaged plants excluded. Ledger page, like Fig. 48. 



inconsiderable in a pure strain. There are modes in this 

 curve, nevertheless, and the following result shows that 

 they are not due to accident. 



The F 2 , the heights of which in 1909 are shown in 

 Fig. 58, was used to provide an F 3 from some thirty of its 



