HALL OF FAME MEN. 



99 



men, and in no case does one of them have more than a single 

 ancestor born in class a. There are consequently only four class a 

 births out of a total of 137, whereas, if they depended upon the 

 law of probabilities, there should be thirteen or fourteen of them. 

 On the other hand, seventeen of the twenty-five famous men have 

 a class A ancestry, while in the case of seven of them there is 



a.o 



a, 

 4- 

 c 



C 

 B 

 A 



FIG. 6 DISTRIBUTION OF HALL OF FAME MEN AND THEIR ANCES- 

 TORS BY THEIR BIRTH-RANKS. 



more than one class A birth. In all there are twenty-eight births 

 in class A, or seven times as many as there are in class a. And 

 further, there is only one birth each in sub-classes a 2 and a 3 , 

 while there are six in sub-class A 2 and four in sub-class A 3 . 



The whole series of birth-ranks given in Table V are condensed 

 into the diagram shown in Fig. 6. This diagram shows very plainly 

 the preponderance of births to old fathers when this group of 

 men and their ancestors are considered together. It also shows a 



