Social Environment and Eugenics loi 



AREAS OP DENSITY OP WHITE POPUUTION 

 EASTERN OTITED STATES. 1860 



White Population 

 per Squfu-e Uile: 



148.75 ^S 19-18i| 

 75-35^ 121-8 I22J 



35-19 m^ 8-1 



that a coefficient falling below 0.30 cannot be 

 interpreted as meaning any decisive causal re- 

 lationship, while anything above 0.50 is cer- 

 tainly decisive, particularly if the so-called 



^ LIBRARY 



.BWVERSITY OF CATjPORNTyr 





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