152 BUREAU OF AMERICAN ETHNOLOGY [Btn^L. 34 



11 per cent). The relatively strongest left hand is met with among 

 the Wliite Mountain Apache and the Laguna Pueblos. In the chil- 

 dren, particularly the Apache, is traceable a slight relative gain in the 

 force of the left hand wdth increase in stature (i. e., in age). No 

 characteristic difference is perceptible between the tallest and the 

 shortest people. As to sex differences, it is seen that the left hand is 

 relatively, as well as absolutely, stronger in the males, in both the 

 Apache and the Pima children, in every stature group but one. Among 

 the adults, however, in nearly half of the tril^es, the left hand shows a 

 somewhat greater relative strength in the females than in the males. 

 The cause of this must be sought in some peculiarity of the work of 

 the Indian woman, as the old fasliioned corn grinding on the metate, 

 in which both hands are used alike. The reader will be aided in this 

 connection by a reference to the individual cases cited in the tables of 

 Appendix. 



SUMMARY OF THE PRINCIPAL RESULTS OF INSTRUMENTAL DETERMINA- 

 TIONS ON THE ADULT 



Stature: The tribal differences in the average stature of the south- 

 western and the north-Mexican Indians are large, amounting to 17 

 cm. in the men and 14.5 cm. in the women. 



The range of differences within the tribes amounts in both sexes 

 to from 20 to 30 cm. 



The dift'erences in the same tribe between the sexes range from 

 15.5 to 9 cm., being greater in the taller peoples. 



Pulse: The pulse rate in all the tribes and both sexes is slower than 

 in whites; it shows no distinctive differences among the tribes, l^ut 

 within the same tribe is slightly more rapid in the tallest individuals, 

 in the females than in the males, and in old age. 



Respiration: The rate of respiraton is very nearly as in whites; 

 there is a slight excess in females over males, and in young over old 

 individuals. 



The pulse-respiration ratio is generally less than 4 to 1, and hence 

 lower than in the whites. 



Temperature: The sublingual tem]:>erature, but little different in 

 the young of the two races, is slightly lower in adult Indians than 

 in whites; it is slightly higher in the females than in the males, also 

 in young than in old adults. 



Muscular potency, so far as tested, is a little inferior to that in 

 average, normal whites; it declines from about 40; in the right-handed 

 it is greater i:i the right hand and in most of the left-handed greater 

 in the left haml; it is greater in tall tribes and in tall individuals 

 than in short ones; and oil the average is less by more than one- 

 third in the female than in the male. 



