EUGENICS 2 
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 : 
Morean, T. H.: Experimental Zoology, 1907. 
THomson, J. A.: Heredity, 1908. 
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, 191I. 
