720 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



I NFERIO R 

 (D-.O) 



AVERAGE. SUPERIOR 



WAOSWOBTH 824S 



10V* 91. _ 



I 1 WHITES 



NEOBOCS 



Fig. 20. Comparison of negroes and whites by camp according to percentage of individuals making inferior and superior 



