212 BUREAU OF AMERICAN ETHNOLOGY [bull. 34 



Among the large tribes the greatest sufferers are the Sioux, the least 

 the Navaho. The geographical distribution of the disease is some- 

 what irregular ; nevertheless the most involved are the northwestern . 

 and northern regions, west of the lakes — hence the humid and cold 

 parts of the country, with the consequences of much indoor life, and 

 greater chance of exposure and infection. 



The frequency of other forms of tuberculosis corresponds for the 

 most part to that of the lungs, but there are numerous exceptions to 

 the rule. 



All forms of the disease predominated somewhat in the males, as 

 shown below: 



Tuberculosis. 



Pulmonary 



Bones and joints. 

 Glandular 



Females. 



100 

 100 

 100 



Males. 



110 

 124 

 111 



As the ratio of males to females in the total mainland Indian 

 population is at present as 101.5 to 100, it seems that there is actu- 

 ally a slightly greater predisposition to tuberculous diseases among 

 the male than among the female Indians. It is well known that 

 phthisis, at least, is also somewhat more common in the male sex 

 among white people. 



As to age, pulmonary consumption predominates in the adults in 

 the proportion of nearly 3 to 2, but of both the other forms there are 

 more cases in the young. 



Tuberculosis. 



Pulmonary 



Bones and joints. 

 Glandular 



Adults, 



100 

 100 

 100 



Children 

 and ado- 

 lescents. 



67 



126 



248 



a The more proper way would be, of course, to compare each group of eases with the number of 

 individuals in the population of that particular age division. 



The relation of tuberculosis to other morbid conditions can not 

 well be studied from general statistics. 



As to the prevalence of morbidity in general, it was seen that 

 many of the northern and some northwestern tribes, as the Sioux, 

 Menominee, etc., showed a larger percentage of most of the patho- 

 logical conditions inquired into than the tribes in other parts of the 

 country. The conclusion seems fully justified that the northern 

 regions, including especially parts of Wisconsin, the Dakotas, and 

 Montana are at present, whatever the direct causes may be, the most 

 unfavorable to the health of the Indian. 



