H. M. Leake 



237 



successive generations directly, and each must be compared with the 

 values for the parental series grown in the corresponding season. It is 

 impossible here to distinguish more than one mode ; there is no trace 



F2I909 



Parents 

 1909 



Fi 19u- 



Parents 



1908 70 ^° ^ ^00 1^° ^20 130 140 150 160 170 180 190 200 210 220 



Type 3 x Type 10 

 Diagram 2. 



of a curve of frequency with three modes such as was found in the 

 case of the leaf factor, nor has any instance of such a curve been 

 obtained for the character under consideration. 



