HRULicKA] PHYSIOLOGICAL AND MEDICAL OBSERVATIONS 93 



With newborn San Carlos Apache and Pima, in the wakin<^ state, 

 the pulse is somewhat more frequent than in the average newborn 

 white, reachino; 160 or more beats per minute; but the heart slows 

 down, especiall}' during the first six months, and the averages for the 

 whole first year show but slight differences from those of whites. 

 The children of the two tribes are, during the first year, in respect 

 to pulse ratio, much alike. 



In children above 1 year of age the Apache show, so far as the 

 limited material indicates (up to 6.55 years), more pulse beats })er 

 minute than the Pima. The number of observations is small, but 

 the fact is too uniform to be wholly fortuitous. The average fre- 

 quency of the heai't beat of the Apache child during the second and 

 third \'ear of life also exceeds a little that of the white, while among 

 the Pima the frequency of pulse is slightly greater only during the 

 second year, falling below the average in whites after that age, and 

 remaining below it through all years thereafter. As will l)e seen from 

 the data on the second series of children, the Apache child even- 

 tually reaches the same condition. The w^hole phenomena may be 

 summarized thus: Both Apache and Pima children start in life with 

 a somewhat higher rate of heart beat than that of white children of 

 similar age; this relative frequency appears to last during the first 

 three years among the Apache, but only up to the end of the second 

 year among the Pima; after this period the pulse of the children in 

 both tribes falls and stays permanently below the average in white 

 children. • 



The sexual differences between the two tribes are slight and some- 

 what irregular. At the same age the Apache show a somewhat 

 higher pulse rate in the female; among the Pima the reverse seems 

 to be the case in a number of groups, but the average age of the girls 

 in these groups is greater than that of the boys; hence comparison 

 becomes unsatisfactory. 



As to respiration in the children of the two tribes, considered sep- 

 arately and compared with whites, the conditions set forth in the next 

 table" will be seen to be related to those observed with pulse. 



a See also detail data in the Appendix. 



