508 



MEMOIKS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



distinctions. The massing of officers above 250, in the A and B grades, is noteworthy by virtue 

 of the sharp contrast with the distribution for enlisted men, which shows its greatest massing 

 in the C groups, especially in the range from 100 to 200. Of the officers who fall in the C group 

 the majority fall above 200. It should be noted further that the existence of a well-defined 

 difference between these groups does not imply the absence of overlapping. Fortunately for 

 the future of the service, the group of enlisted men received through the draft shows repre- 

 sentatives over the whole range covered by the officer group. 



76th DIVISION 

 CAMP DEVENS 



GRADE 



A 



OR 



B 



76th DIVISION 

 CAMP DIX 



80th DIVISION 

 CAMP LEE. 



d4th DIVISION 

 CAMP TAYLOR 



D 



FOREIGN 25 



Oft. 



ILLIT. 



20.4- 



0.0 



MEN " y,LIU 



(.09 it.) ("9r) 



S.6 



0.0 



(LNLiSTeo OFFICERS 



ME.N 



177 



CO 



EN J-' STE0 OFFICERS 



MEN. . 



(2664o) (203a) 



74 



o.o 



E MEH 60 0fflCERS 



(.6T63) ('"&) 



Fiq. 13. Percentages of officers and of enlisted men making (1) A or B grades, (2) C grades, (3) D or E grades, and (4) eliminated on the ground 

 of illiteracy. Numbers in parentheses show numbers of cases. 



A still rougher comparison of these two groups is presented in figure 13. This shows, for 

 each camp, the percentages of officers and of enlisted men making (1) A or B grades, (2) C 

 grades (C + , C, or C— ), (3) D or E grades, and (4) men eliminated from examination a on the 

 ground of illiteracy. The above distinction centers about the significance of the C group as 

 most representative of the whole class of privates. The characterization of C as designating 

 the "private type,' ' or the typical private, based first on the preliminary summer investigation, 

 is further justified by the fall data showing that the mean, the median, and the mode for en- 

 listed men are in C, and that over 50 per cent of the cases fall in this class. The accompanying 

 figure, therefore, shows the relative numbers above, below, and in the class of the average enlisted 

 man, and also the numbers in the additional, somewhat mdeterrninate group of the relatively 



