40 THE RIGHT TO BE WELL-BORN 



If the domestic animals furnish absolute 

 proof of my statement, that only a few 

 sires of a breed can improve it, the applica- 

 tion to eugenics is apparent; that only a 

 few men come under Combination I. 



I have explained in the five combinations 

 why "Peter the Great" is the great sire 

 he is; why it is that one stallion has 

 more vitality, more stamina than another, 

 even if it be his own brother ; and why one 

 stallion produces a better colt than his own 

 brother, even when both have been bred 

 to the same mare. We know why a mare 

 produces a male colt at one time and a 

 female colt at another. We do not yet know 

 how to regulate sex, but we undoubtedly 

 will know before long. When a scientist 

 is imbued with a truth, he is sure to dis- 

 cover its cause. What is true of the horse 

 family is just as true of the human family. 

 We see this today when our N. Y. City 

 Health Department is unable to secure 

 pure human blood for their serums for the 

 cure of Infantile Paralysis. They use the 

 blood of young horses. Some strains of 



