406 



SCIENCE 



[N. S. Vol. XLIX. No. 1269 



and ordinates show the number of men in 

 each group. The number of men in the va- 

 rious weight groups at the time of enlistment 

 is shown for each of the organizations as a 

 solid line while the distribution of weights 

 of the same men after four months is shown 

 as a dotted line. Corresponding averages of 

 the two sets of weights for the three organi- 

 zations are similarly indicated. It will be 

 noted that the average gain was 2.6, 4.0 and 

 lO.Y pounds for Company A, 366th Infantry, 

 331st Machine Gun Battalion, and Company 

 E, 356th Infantry, respectively. 



A second study of a similar kind was made 

 at Camp Devens by Lieutenant Thurlow C. 

 l^elson under the sui)ervision of Captain J. 

 Garfield Eiley on the 303d Eegiment of Field 

 Artillery. Fig. 2 shows the distribution graph 

 of the weights of 523 men of this regiment at 



enlistment and approximately six months 

 later. For the men of this group, chest and 

 height measurements were taken as well as 

 weight. It was found that the height of the 

 group remained approximately stationary, but 

 that chest motility increased on the average 

 0.7 inches during the five months of training. 

 The increase in motility is considerable, repre- 

 senting as it does a 23 per cent, gain over the 

 average of the men at enlistment. 



A third study of gain in weight was made 

 by Lieutenant Wm. A. Perlzweig, Sanitary 

 Corps, on recruits at Camp Pike. A group 

 of National Army men, 257 in number, was 

 selected for study during their first weeks in 

 camp. The typhoid prophylaxis was given in 

 the first two weeks. In the third week the 

 men were divided by the camp authorities 

 into Class A men and Class B men. Class A 

 consisted of those in good physical condition. 

 This class was put at once on a hard train- 

 ing schedule to fit the men for overseas service 

 in the shortest possible time. Class B in- 

 cluded men who on account of minor physical 

 defects were continued on the light training 

 schedule that the entire group had formerly 

 undergone, until their defects could be reme- 

 died or their classification for limited service 

 branches of the army could be effected. In 

 addition to recording weight changes of these 

 recruits, their average food consumption per 



RtCFtulTS , CA.mP 1^1 KCl 



Typhoid pr-oph>j- 



T-^phoid prophvj- 



