The Age of Parents 49 



result is shown in the following table, in whicK 

 all three tabulations appear: 



Percentage of Births to Fathers of Different Ages. 



In Pedigrees 

 of Eminant 



Ages of Fathers Men Normal In Chicago 



24 and under 1.63 9.06 15.83 



25 to 29 9.77 23.05 31.20 



30 to 34 16.63 26.00 24.67 



35 to 39 19.19 19.67 15.30 



40 to 44 20.23 13.39 8.06 



45 to 49 14.53 5.50 3.55 



50 and over 18.02 3.33 1.39 



Is it really necessary to comment on that 

 table? Is it not perfectly plain that birth con- 

 trol as it is being practiced in Chicago is carry- 

 ing the race backward? 



It is recognized that from powerful-minded 

 parents we get powerful-minded offspring, and 

 from feeble-minded parents we get feeble-minded 

 offspring. It was shown before that mental 

 power in human beings continues to develop 

 from youth to old age. Hence, the same normal- 

 minded person may be relatively feeble-minded 

 as a parent in early life, and relatively power- 

 ful-minded in later life. We have examined pow- 

 erful-minded persons and have found that they 



