ARNETH'S NUCLEAR CLASSIFICATION. 



411 



series of cases. Some authors have considered that blonds are less well 

 able to stand the influence of a tropical climate. As far as our small 

 series of observations is concerned, we do not think this view, is sup- 

 ported ; in fact the higher Arneth indexes for brunettes, if found to be 

 constant in larger series, might indicate the reverse condition. 



THE POSSIBLE SIGNIFICANCE OF LOW POLYMORPHONUCLEAR COUNTS AND 

 HIGH ARNETH INDEXES IN FILIPINOS. 



In estimating the significance of the blood counts which we have 

 found in Filipinos it is necessary to consider the four factors discussed 

 below. 



1. Low polymor plionudear count in Filipinos. — That the polymorpho- 

 nuclear cells of Filipinos and of Americans long resident in the Philippines 

 are reduced below the minimum point considered normal for Americans 

 and Europeans at home seems quite well settled. Some results found in 

 healthy persons in the Philippines are shown in the following table. 



Table IV. — Reduction in polymorphonuclear neutrophiles found in the 



Philippines. 















6 



o 













,/ 







XI 













2 



S 



p. 



p. 





Observers. 



Race. 



Num- 

 ber ob- 

 serv- 



Residences 

 in Philip- 

 pine 



03 



"3 



3 



u 



>. 











ed. 



Islands. 



c 



B 





£f 



*J 











o 



o 



a 



o! 



0! 











p., 



H 



CO 



J 



g 



Wickline (12) 



Americans" _ 



104 



Batangas__ 



54.9 



5.1 



33.4 



6.1 



0.5 



Guerrero and Sevilla (11) 



Filipinos 



129 



Taytay 



51.6 



11.2 



34.5 



4.1 



0.2 



This Board (10) 



Americans'' _ 



115 



Various 



58.7 



3.6 



32.6 



4.6 



0.5 



This Board (9) 



Igorotsi^ 



40 



Baguio 



46.9 



8.9 



37.2 



5.7 



0.4 



This Board.- _ 



Americans* _ 



72 



Various 



56.8 



3.8 



a. 7 



6.9 



0.8 



Do 



Filipinos" — 



50 



do 



52.2 



10.6 



29.9 



6.6 



0.7 





■' These were all soldiers who had served continuously in the Philippines over 18 months 

 at the time the counts were made. 



'' All the members of this group were soldiers who had been in the Philippines over a 

 year. 



<^ All of this group were adult males. 



•'All of these were soldiers with. an average of 14 months' continuous Philippine 

 service. 



" Includes transitional forms. 



In all of the counts made by ourselves cave has been taken to count back 

 and forth completely across the slide to avoid obtaining an undue number of 

 small lymphocytes which are liable to be more numerous in the central portion 

 of the smear than at the borders. 



That these low polymorphonuclear and high lymphocyte counts for 

 Americans developed gradually after residence in the Philippines and 

 were not present on their arrival in the Islands has been shown by 

 Wickline. (12) 



2. The cells of the body lohich are phagocytic. — It is generally accepted that 

 the small lymphocytes have no phagocytic power. Buchanan says that the 



