124 A RE THE EFFECTS OF USE INHERITED? 



every exceptionally gifted race." Mr. Galton's 

 hypothesis " explains the fact of certain diseases 

 skipping one or more generations," and it " agrees 

 singularly well with many classes of fact ; " and it 

 is strongly opposed to the theory of use-inheritance. 

 The elements which are used die almost universally 

 without germ progeny : the germs which are not 

 used are the great source of posterity. Hence, 

 when the germs or gemmules which achieve de- 

 velopment are either better or worse than the 

 residue, the qualities transmitted to offspring will 

 be of an inverse character. If brain-work attracts, 

 develops and sterilizes the best gemmules, the 

 ultimate effect of education on the intellect of 

 posterity may differ from its immediate effect. 



EARLY ORIGIN OF THE OVA. 



As the ova are formed at as early a period 

 as the rest of the maternal structure, Galton 



