440 



CHAMBERLAIN. 



Hcemoglobin estimations and counts of the red blood cells. — Most of 

 the haemoglobin estimations were made with the Dare haemoglobino- 

 meter and the blood counts were performed with the Thoma-Zeiss hse- 

 mocytometer. The results are given in the following tables : 



Table XV. — Comparative average hwmoglohin and red blood cell estimations on 

 26 blonds and 39 brunettes, 1909-Group. 



■ Type. 



.lanuary. 



July. December. 



Sn: ^ed cells. 



Color 

 index. 



gloSnJ^'^'i-'l- 



Color 

 index. 



Hsemo- 

 globiri. 



Red cells. 



1 

 Color 

 index. 



Blond__ 



Brunette 



Per ct. 

 88. 4 5, 307, 000 

 89. 8 5, 255, 000 



0.83 

 0.85 



Per ct. 

 87.5 5,411,000 

 88. 7 5, 317, 000 



1 



0.80 



0.88 







Per ct. 

 88.9 

 90.7 



5, 096, 000 

 5,189,000 



0.88 

 0.87 \ 



Table XVI. — Comparative average hwmoglohin and red cell estimations on 

 blonds and 279 brunettes at beginning and at end of observation period, 1910-^ 

 Group. 



Type. 



Blond ___. 

 Brunette. 



Second quarter 1910. 



Color 



Haemo- 

 globin. 



Red cells. 



index. 



Per ct. 



90.0 5,158,000 ; 0.87 

 90.5 5,063,000 i 0.89 



Second quarter 1911 

 Hsemo 



globin. 



Per el. 

 89.3 

 89.9 



Red .cells. 



5, 185, 000 

 5,229,000 



Color 

 index. 



0.87 

 0.86 



In both groups we have obtained results similar to those previously 

 reported by WicklineO) and by Phalen of this Board(lO) ; namel)', a red 

 corpuscle count ranging above 5,000,000 and a haemoglobin average ap- 

 proximating 90 per cent. Therefore the color index is low, our figures 

 for, different periods ranging from 0.80 to 0.89. Since the observations 

 of about a dozen careful workers, comprising over 1,700 red cell counts 

 and an equal number of haemoglobin estimations, have all shown the 

 same tendency, it appears to us certain that a high red corpuscle count 

 and a rather low color index must be characteristic for the American 

 who has lived one or two years in the Philippines. 



When the two complexion types are compared it will be noted that in 

 both the 1909-Group and the 1910-Group the differences, for corpus- 

 cular counts, for haemoglobin and for color index, were slight and also 

 were inconstant, at some observation periods the blonds and at others 

 the brunettes being in the lead. If we combine and average the color 

 indices for all the observations in each of the two groups it will be seen 

 that the differences are only 0.014 for the 1909-Group and 0.005 for the 

 much larger 1910-Group. Such slight variation are entirely without 

 significance. 



