ORANGE-RED UNDERWEAR. 



529 



periods of the experiment — in January, in Julj r , and at the end of the 

 year, in December. The first table gives the weights of one hundred 

 men of each group, selected because they arrived in the Philippines very 

 shortly before the beginning of the experiment; therefore this table gives 

 an indication of the change in weight of newcomers. In the second 

 table are *iven the weights of all the men under observation. 



Table I. — Comparative weights of recent arrivals in pounds avoirdupois. 



Group. 



Begin- Mid- 

 ning. j year. 



Loss. 



End. 



1 

 Loss. 





139.3 135.0 

 140.9 137.7 



4.3 

 3.2 



136.2 

 137.6 



3.1 

 3.3 



White - 





Of the first group, 86 men lost weight, 11 gained, and 3 remained 

 stationary. Of the second group, 79 men lost weight, 14 gained, and 7 

 remained the same. 



Table II. — 'Comparative weights of all men observed, in pounds avoirdupois. 



Group. 



Begin- 

 ning. 



Mid- 

 year. 



Loss. 



End. 



1 

 Loss, j 





141.6 

 143.0 



137.6 

 139.9 



4.0 

 3.1 



138.8 

 140.6 



2.4 [ 



White _ ____ 



The difference between these two tables is very little, showing mainly 

 a slightly greater average loss in weight for the new arrivals. The 

 differences are greater in reality than appear in the tables. Whereas, 

 the new arrivals almost uniformly lost weight in very nearly equal 

 proportion, the older residents showed much greater variations, the 

 losses and gains being more decided in character and more irregular. 

 As a group, the inmates at the military prison at Fort McKinley gained 

 an average of 1.3 pounds per man, although they fell off 0.8 pound in 

 the middle of the year. A common feature of both tables and of both 

 groups is the loss of weight, greater at the middle of the year than at 

 its close. The obvious explanation of this phenomenon is the higher 

 average temperature during this time of the year and the consequent 

 greater loss from perspiration. Comparing the two groups, it is of 

 interest to note that the loss of weight of those wearing the special 

 clothing was materially greater at the mid-year period than that of the 

 group wearing white. This difference does not appear at the close of 

 the year. 



Blood counts. — The blood of 123 men was examined at the begin- 

 ning of the 3'ear, but because some of the men left the division, the 

 last of the three examinations included but 115 men. The red and white 



