748 MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Table 281. — Variables: Alpha score X schooling. Group I, II, III: White draft (native born). 



For men who took alpha only. 



[Vol. XV. 



Table 282. — Variables: Beta score X schooling. Group I, II, III: White draft (native born). 

 For men who took beta only or alpha and beta. 



