WISSLER, MEASUREMENTS OF DAKOTA INDIAN CHILDREN 361 



The predominating negative sign makes it clear that these Indian 

 children are less variable than the whites, and again the mixed bloods 

 fall between the white and full blood standards. As a check upon this 

 difference, we may use the variability values in Table 3 (exhalation). 

 Taking the full bloods as the standard, we find the following differences 

 for the mixed blood children : 



The predominating positive values show clearly that even here the 

 variability is greater for the mixed bloods, thus confirming the general 

 tendency of this class to approach the white standard in size relations, 

 in contrast to the full bloods. 



Most studies of this kind for white children have concerned themselves 

 with the annual increments and the periods of maximum growth. Our 

 dnta readily lend themselves to comparison with the results so far at- 

 tained. Growth is usually estimated by the absolute increments, or the 

 dilferences between the averages for the respective ages. From our tables 

 we obtain the followine^ for stature : 



