CONTENTS. 7 



PAGB 



the higher classes The consequence according to Weis- 

 mann's theory Testimony of the nineteenth century 

 Parisian skulls. 



Deduction from the theory of use-inheritance: Educa- 

 tion of successive generations Testimony of Greece, Rome 

 and modern times Revival of learning Eminent men in 

 different centuries Fig. i. One hundred great men 

 England and Scotland United States Inventions an index 

 to mental power. 



Comparison of Deductions: Objections to the evi- 

 dence of use-inheritance Weismann's statement. 



CHAPTER IV. 

 BASIS OF INVESTIGATION, Continued .74 



Origin of great men: Sons of prominent men Re- 

 lated to inferior men Cromwell. 



Use and Disuse: Biological meaning Average use 

 Normal use Amount of use per ancestor Functional 

 activity and time as the factors of use Physical maturity 

 Physical training Physical disuse Growth of brain 

 Diagram, Fig. 2 Growth of functional capacity extends 

 beyond physical growth Mental capacity at different ages 

 Hypothetical community Diagram of body and brain 

 capacity, Fig. 3 Formula for inheritance Recapitulation 

 of second deduction from use-inheritance. 



CHAPTER V. 

 STANDARD OF COMPARISON 83 



Hall of Fame : Men chosen Why especially ex- 

 amined. 



Formation of Standard Scale: Tabulation from a 

 genealogy Divisions of the scale, Table i Extremes 

 Birth-ranks Sub-divisions of extremes of the scale. 



Scale Compared: Records from Ireland, Scotland and 



