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MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



Table 293.— Variables: Beta X schooling. Groups I, II, III: White draft (foreign born). 



For men who took beta only, or alpha and beta only, or beta and an individual examination, or alpha and beta and 



an individual examination. 



Table 294. — Variables: Alpha score X schooling. Group V: Colored draft, North. 

 For men who took alpha only. 



