102 



BUREAU OF AMERICAN ETHNOLOGY 



[BULL. 34 



Pulse rate in relation to stature — Continued 



The figures show that the average pulse in all the groups and in 

 both sexes of Indian children above 90 cm. in height (or about 3 

 years of age) is slower than in whites. There are, of course, a few 

 exceptions in individuals. In many of the subdivisions, however, 

 particularly in the males, even the maximum in the Indians is less 

 than the average in the male whites. 



The (Ufferences are not the same during the entire period of growth. 

 It was shown in the first series (Children of known age) that the 

 Indian child begins life with a pulse rate higher than among whites. 

 Then follows, during the first six months, a rapid decrease in the 

 pulse rate, followed by a more moderate diminution (although exceed- 

 ing the rate of retardation in whites) until at least the third year. 

 After this, as may be seen to better advantage in the figures given 

 below, the rate of retardation in the Indian child diminishes until about 

 the eighth year; from 8 to about 13 there is again a more marked 

 decrease of the pulse rate in the Indian; while after 13 the diminu- 

 tion in the rate progresses decidedly more in the whites until nearly 

 adult life. AVhen ultimately a relative stability is attained the differ- 

 ences in pulse rate between the two races are reduced to a consider- 

 able extent ."^ 



Differences in pulse rate between Indian children an4 white children of same heic,hts 



a See Pulse in adults. 



