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BUREAU OF AMERICAN ETHNOLOGY 



[BULL. 34 



of the same stature; but this period in both the Apache and the 

 Pima is reached earher than in the whites by approximately one 

 decimal stature group, or about two years. This corresponds, as will 

 be seen later (under Menstruation, pp. 126-127), with the earlier 

 puberty in the Indian girl. 



The data on weight were further utilized to obtain a view of the 

 relation between the increase in weight and the increase in stature, 

 with the following results: 



Gain in iveight in grams for each centimeter { = gc.) of stature 



The figures show that there is a fair increase in relative weight 

 between the statures of 120 and 129.9 cm. (about 8 to 10 years), 

 followed in all the children by a diminution in the increase in the 

 next group (130 to 139.9 cm. equals about 10 to 12 years in age) 

 and rising again thereafter. The maximum augmentation in relative 

 weight is attained in the females of both tribes in the two stature 

 groups of from 140 to 159.9 cm. (approximately 12 years and older) 

 and in the males of both tribes in the two stature groups of from 

 150 to 169.9 cm. (approximately 14 to 18 years), that is, about at, or 

 more likely after, puberty. 



Growth of the head. — In absolute measurements the three principal 

 diameters of the head increase in the Indian child through the vari- 

 ous stature groups as follows: 



Diameter antero- posterior maximum {glabello-occi pital ) , average 



