766 



THE POPULAR SCIENCE MONTHLY. 



years should be taller than the half-blood child, and then develop 

 more slowly than the latter. This peculiarity is most striking in 

 the growth of the tribes of medium stature, as in this case the 

 difference in the statures of adults is so considerable. Unfortu- 

 nately, we do not know if the same difference prevails at the time 

 of birth ; but even if this were the case the difference in the rate 

 of growth would remain mysterious. The various phenomena 

 described here merely emphasize the fact that the effect of inter- 

 mixture is a most complicated one, and that it acts upon physio- 

 logical and anatomical qualities alike. We observe in the mixed 

 race that the fertility and the laws of growth are affected, that 

 the variability of the race is increased, and that the resultant 

 stature of the mixed race exceeds that of both parents. 



One of the most striking characteristics of the Indian face is 

 its great breadth as compared with that of the whites. It is there- 

 fore of peculiar interest to compare this measurement among the 

 full-blood Indian, the half bloods, and the whites. The curves on 



120 mm. 130 140 150 J60 170 



FIG. 5. BREADTH OF FACE. Sioux. 



Fig. 4 show the result of this inquiry. Among adult students of 

 American colleges we find an average breadth of face (between 

 the zygomatic arches) of 140 millimetres, while the average value 

 among Indians is nearly 150 millimetres. The facial measure- 

 ments of the half bloods are intermediate, the average value be- 

 ing nearer the typical Indian measurement and remote from the 

 white measurement. We find in these curves also the peculiarity 

 observed before that the half blood is more variable than the 

 pure race. This fact is expressed in the greater flatness of the 

 curve. 



It will be noticed that the central portion of the curve illus- 

 trating the distribution of the measurements of breadth of face 

 of half bloods is markedly irregular, particularly that it shows a 

 depression in its central portion. This might seem accidental, but 

 it will be seen that in Figs. 5 and 6, where the same measurements 

 for the Sioux and Ojibwas are given, the same phenomenon ap- 

 pears. We see in all these curves that the measurements which 

 are near those of the parental races appear more frequently in the 



