530 



PHALEN. 



corpuscle counts were made with a Thoma-Zeiss haemocytometer and the 

 haemoglobin estimates with the Dare instrument. In the differential 

 count no attempt was made to divide the lymphocytes into groups and 

 the differentiation between this class and the large mononuclears was 

 made upon their staining reactions rather than upon their sizes. 



Table III. — Blood examinations. 



Period and group. 



as 



w 



At beginning: 



Orange-red (66 men) 

 White (57 men) 



At mid-year: 



Orange-red (62 men) 

 White (56 men) 



At end: 



Orange-red (61 men) 

 White (54 men) 



5, 0a5, 100 

 5, 075, 000 



5, 156, 000 

 5, 090, 000 



5,346,000 

 5,184,000 



P. ct. 

 93.5 

 89.6 



91.6 

 88.4 



92.4 

 89.2 



P.ct. 

 91.9 

 88.3 



88.8 

 86.7 



86.4 

 S6.0 



7,122 

 7,475 



7, 552 

 7,305 



6,868 

 7,372 



P.ct. 

 55.2 

 57.8 



58.8 

 59.4 



55.4 

 58.7 



P.ct. 

 35.6 

 33.3 



32.2 

 32.9 



36.3 

 32.6 



P.ct. 

 5.3 



6.1 

 4.0 



5.0 

 4.6 



P.ct. 

 3.2 



2.7 



2.S 

 3.4 



2.5 

 3.6 



P.ct. 

 0.7 

 0.9 



0.6 

 0.3 



0.8 

 0.5 



The results of these examinations agree in character if not in degree 

 with those made by Captain W. A. Wickline, Medical Corps, whose ex- 

 cellent work along this line at Camp McGrath in 1905-1906 appeared in 

 one of the late volumes of the Military Surgeon. In both groups, as in 

 Captain Wickline's subjects, there was an increase in the number of 

 the red cells and a decrease in the percentage of haemoglobin, the haemo- 

 globin index showing necessarily an even greater diminution. The dif- 

 ferential leucocyte count shows the same high proportion of lymphocyte 

 cells, this increase being at the expense of the polymorphonuclear cells. 

 This variation from the normal proportions appears in the first count and 

 is quite uniform throughout the three examinations. The disparity 

 between these counts and those of Captain Wickline, whose earlier exam- 

 ination showed a fairly normal proportion in the white cells, is due to 

 the fact that Captain Wickline's subjects were largely new arrivals 

 from the United States, while the examinations here reported were mainly 

 on men who had served for a year or more in the Philippines. 



The ehief difference noted in the two, groups is the greater increase 

 in the red cells with a greater decline of the haemoglobin index in 

 the group wearing the special underclothing. One explanation of the 

 erythrocyte increase in the Tropics is that it is due to excessive perspira- 

 tion, which, by concentrating the blood, gives an increase which is not 



