THE PURE LINE HYPOTHESIS. 



549 



withstanding the fact that the paternal variegated grandparent 

 was the same for all the families. 



The maximum amount of variegation observed was called 

 lOO, and an estimation of the variegation oif the plants relative 

 to the standard was made in percentages. The necessary data are 

 given in the accompanying table, and the families are arranged 

 in ascending order of their mean variegation. 



