794 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



Table 337 . — Distribution of negroes by recommendation according to mental age. 



[Vol. XV, 



Tables 338 and 339, giving the distribution of disease according to the five classes of recom- 

 mendations, show that there is little relation between the disease conditions and the group for 

 which a man was recommended. Attention is attracted to the negroes in the development 

 battalion, where the largest per cent free from disease were placed, as well as the smallest per 

 cent with venereal disease. With the whites the largest per cent free from disease fall in the 

 regular service group and the next largest in the development battalion. As with the negroes, 

 the smallest per cent of whites with venereal disease are in the development battalion. 



Table 338. — Percentage distribution of disease according to psychological recommendations. 



NEGROES. 



Table 339. — Percentage distribution of disease according to psychological recommendations. 



WHITES. 



By dividing the group, according to mental age, into those with venereal disease and those 

 without, as in table 340, it can be observed that there is but slight difference in the medians of 



either the negroes or the whites. 1 



i Cf. the discussion of the relation of intelligence ratings to venereal disease in The Influence of Certain Physical Factors on the Intelligence 

 Score .pages 812 fl. 



