462 CHAMBERLAIN. 



brunettes the evidence was conflicting, some facts being in favor of the 

 fair and others in favor of the dark complexioned men. This is what 

 would be expected if there were actually no differences between the two 

 types as regards their resistance to tropical influences. From a con- 

 sideration of all the data it appears that blonds are quite as well able 

 as brunettes to withstand the iniiuences of the Philippine climate for a 

 period of two years and probably for a period of five and one-half years. 

 In case of residence beyond the latter period we are not in a position to 

 express an opinion based on any extensive personal observation. 



In concluding we wish to acknowledge our indebtedness to the officials 

 of the Division Hospital in Manila for affording the opportunity to 

 examine the patients invalided home; to the Director of the Philippines 

 Constabulary and the chief of the Manila police for collecting statistics 

 from their subordinates; to the superintendents of the institutions in 

 the United States who classified their cases of insolation; and especially 

 to the medical officers named in footnotes 3 and 5, who, by their en- 

 thusiastic and conscientious work, made it possible to obtain the data 

 considered in Part II of this report. 



CONCLUSIONS. 



1. Exact observations continued for a period of one year on large 

 numbers of blonds and brunettes in the military service showed no 

 constant or material differences for the two complexion types. 



2. The amount of sickness occurring in the Philippines was larger 

 among the blonds in the soldier group and among the brunettes in the 

 Scout-Constabulary-Police-G-roup. In the latter group the proportion 

 of men who had never been sick was much larger for the blond type. 



3. As regards disagreeable symptoms referable to climate the evidence 

 was conflicting, but on the whole the blonds suffered more than the 

 brunettes. 



4. Among the soldiers invalided home the brunettes were in much 

 larger proportion than they were in the Philippine forces as a whole. 



5. In the Scout-Constabulary-Police-Group, which had an average of 

 5.5 years of tropical service, the proportion of blonds as compared with 

 brunettes was probably as high as it ever had been. 



6. The military conduct of the blonds appeared to be as good as that 

 of the brunettes except perhaps in regard to alcoholism. 



7. In the United States the relative incidence of insolation was, prob- 

 ably slightly higher among the brunettes than it was among the, blonds. 

 ]. 8. On the whole the blonds seemed fully as able as the brunettes to 

 withstand Philippine service for a period of two years, and probably 

 as able for a period of five or six years. 



