:ss 



NATURAL INHERITANCE. 



[CHAP. 



has been entered in the Table for the purpose of 

 illustration, while its small size makes it all the more 

 intelligible. 



The fourth column of the Table headed " Percentages " 

 of " Sums from the beginning," is pictorially translated 

 into Fig. 2, and the third column headed " Percentages " 

 of " No. of cases observed," into Fig. 3. The scale of 



FIG. 2. 



4V 29 



Ibs. is given at the side of both Figs. : and the com- 

 partments a to g, that are shaded with broken lines, 

 have the same meaning in both, but they are differently 

 disposed in the two Figs. We will now consider Fig. 2 

 only, which is the one that principally concerns us. 

 The percentages in the last column of Table I. have 

 been marked off on the bottom line of Fig. 2, where 

 they are called (centesimal) Grades. The number of 

 Ibs. found in the first column of the Table determines 



