130 BUREAU OF AMERICAN ETHNOLOGY [bull. 34 



Heart action, lung action, heat production 



Pulse: The average heart beat was found more frequent m the 

 newly born and in the very young Indian children than in white 

 infants of similar age ; but after the third year it is invariably slower 

 than in the whites. 



There are some tribal differences, but they are of minor character. 



Sex differences were found to be not pronounced during the earlier 

 years of the Indian children, but after these reach the age of 5 or 6 

 years the pulse in the female is slightly quicker than in the male. 



Respiration: Racial, tribal, and sex differences are not pronounced 

 during the earlier ^^ears. 



From the age of about 6 years and onward there are only slight dif- 

 ferences between the respiratory rate of the Indian and that of the 

 white child. 



Between the tribes the Apache show a slightly slower respiration 

 than the Pima, but the difference diminishes with age. 



In females more than 6 years old the rate of respiration is through- 

 out slightly in excess of that in males. 



The pulse-respiration ratio increases up to about the fifth year; in 

 older children it is througliout lower than in the whites; it is lower in 

 the Pima than in the Apache children; and, except during the first 

 year of life, is slightly lower in the males than in the females. 



Temperature : The mouth (sub lingua) temperature of the Indian 

 children of school age and of adolescents was found to differ but little 

 from that in children and adolescents among the whites." 



There are slight tribal and sex differences; in most of the stature 

 groups the females show a little higher average temperature than 

 the males of corresponding divisions. 



Muscular potency 



Muscular force: The pressure force and, in younger subjects, also the 

 traction appear on the average slightly inferior to those in whites. 



There are some tribal differences. 



Sex differences are pronounced, especially among the adolescents, 

 the males being in all three tests the stronger. 



The right hand in right-handed persons, the left hand in left-handed 

 persons, is generally the stronger.^ 



Growth 



Body, height sub- and supra-ischia : The proportion of height above 

 the ischia to total height diminishes up to about the fourteenth year 

 of age; in subsequent years it shows a slight augmentation. 



Tribal differences are quite insignificant. 



a See Temperature in adults, p. 142. b See Muscular force in adults, pp. 146 ct seq. 



