The Shifting of the Curves of Variability. 555 



variation (Qi, Q2) has not increased very much, and 

 is in fact a httle less than in the experiments with selec- 

 tion. Accordingly, the minimum and maximum have 

 been shifted in a most striking way in the same direc- 

 tion: small fruits are absent after three years of pot- 

 culture of the seedlings, whilst the longest fruits have 

 increased greatly in length. 



