EUGENICS 21 



how far our recently acquired knowledge of variation 

 and heredity can be applied to mankind, and to ' the 

 study of agencies under social control that may im- 

 prove or impair the racial qualities of future genera- 

 tions/ 



BIBLIOGRAPHY. 



The two following works will be found specially useful on 

 account of the extensive bibliographies which they contain : 



MORGAN, T. H. : Experimental Zoology, 1907. 

 THOMSON, J. A. : Heredity, revised edition, 1919. 



These may be consulted for further references beyond those 

 given at the end of each of the following chapters. 

 As an introduction to the whole subject of Heredity : 



DONCASTER, L. : Heredity in the Light of Recent 

 Research, 1911. 



