40 



BUREAU or AMERICAN ETHNOLOGY 



[BULL. 34 



children. With patient inquiry it is often possible to arrive at a close 

 approximation to the age of a particular person, but with large 

 numbers the method is not practicable. Estimating age on the basis 

 of ascertained cases is, except with smaller children, really the only 

 other means that can be employed with any coMsiderable degree of 

 success. This method may be of service, provided the limits allowed 

 in the estimates, especially in the case of persons above middle age, 

 are quite liberal. 



The Twelfth Census gives the nearest approach yet attained to 

 reliable data on population by ages among the Indians. The count 

 applies to all the tribes in bulk; as there are individuals among many 

 of these tribes more or less educated and taught to pay attention to 

 age, errors, with their attendant effects, inevitable elsewhere, are 

 lessened. Another favorable feature is the fact that, with the more 

 23rimitive tribes, who are segregated on reservations, the enumerator 

 was generally the agent or some one else well acquainted with the 

 Indians and thus less likely than an outsider to make gross errors 

 in recording ages. Yet the results furnished, which follow, should 

 not be looked on as wholly accurate. 



Populatio7i by ages^ 



Ages. 



All ages 



Under 1 year 



Under 5 years 



5 to 9 years 



10 to 14 years 



15 to 19 years 



20 to 24 years 



25 to 29 years 



30 to 34 years 



35 to 39 years 



40 to 44 years 



45 to 49 years 



50 to 54 years 



55 to 59 years 



60 to 64 years 



65 to 69 years 



70 to 74 years 



75 to 79 years 



80 to 84 years 



85 to 89 years 



90 to 94 years 



95 to 99 years 



JOO years and over 



232,562 Indians of the mainland. 



Males. 



■thousand 



503. 59 



15.26 



72.96 



68.85 



62.04 



.'>2.91 



43.78 



36.57 



29.32 



26.41 



25.18 



21.79 



18. 86 



12.53 



11.42 



7.77 



5.91 



3.14 



2.16 



.71 



Per million. 



232. 00 



224.00 



Females. Sex ratio.* 



Per thousand. 



496. 41 



15.21 



71.98 



68.47 



58. 27 



50.96 



41.75 



'34.86 



28.87 



25. 82 



25. 15 



20.91 



18.39 



12.77 



12.81 



8.59 



7. 03 



3. 85 



3.17 



1.28 



.92 



Per million. 



305. 00 



2.')4. 00 



101.4 



100.3 



101.4 



100. 6 



106.5 



103.8 



104.9 



104.9 



101.6 



102.3 



100.1 



104.2 



102. 6 



98.1 



89.1 



90.4 



84.1 



81.6 



68.1 



62.5 



40,837,331 native whites in United States 

 born of native parents. 



Males. 



Per thousand. 



508. 68 



14.39 



67.91 



64.27 



57.91 



51.98 



46. 62 



40.03 



33.61 



29.19 



26. 86 



22. 95 



19.88 



14.83 



11.84 



8.86 



5.99 



3.58 



1.69 



. .16 



Per million. 



118.00 



17.00 

 3.00 



Females. 



Per thousand. 



491. 32 



13.95 



65. 91 



62. 45 



56.21 



51.73 



46.57 



38. 54 



31.51 



27. 12 



24. (18 



20. 82 



IS. 12 



14.67 



11.81 



8.77 



.5.98 



3.67 



1.84 



.69 



Per in ill ion. 



174.00 



34.00 

 6. 00 



Sex ratio. 6 



103.5 

 10.3. 2 

 103.0 

 100.0 

 103.0 

 100. 5 



100. 1 

 103.9 



106. 



107. 6 

 108.8 

 110.2 

 109. 7 



101. 1 



100. 3 



101. 

 100.0 



97.5 

 91.8 

 81.2 



50.0 

 50.0 



a Prepared by the writer from data of the Twelfth Census, 1900, I, n, Population. 

 l> Number of males to each 100 females. 



