774 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. xv. 



WMi-tt 0«a/t. Niti-e BpAH ■ 

 WMlTC OMAFT.FoOCiCN 6*AM- 

 WlG«o DKArT. N««THLRH * 



Alpha 



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175 200 



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Fios. 40 and 41. Distribution of alpha and beta scores. These groups contain only recruits who reported that they were in the fourth grade when 

 they left school. The comparison is then between the intelligence scores of white (native and foreign), and negro (northern and southern) 

 recruits who had had equal school opportunities, i. e., fourth grade. 



