764 THE POPULAR SCIENCE MONTHLY. 



follow that tlie intermixture has a favorable effect upon the 



race. 



The difference in favor of the half blood is a most persistent 

 phenomenon, as may be seen by a glance at the following table : 



Differences of Average Statures of Indians and Half Bloods. 



The last two entries in this table embrace mainly the Indians of 

 the Southwest and of the Pacific coast. 



The facts which appear so clearly in the preceding table may 

 be brought out in a different manner by grouping all the Indian 

 tribes according to their statures in three classes : those measur- 

 ing more than 169 centimetres, or tall tribes; those measuring 

 from 165 to 1G9 centimetres, or tribes of medium stature; and 

 those measuring less than 165 centimetres, or short tribes. The 

 frequencies of various statures in each of these classes have been 

 plotted in Fig. 2. The horizontal line represents the individual 

 statures from the lowest to the highest. The vertical distance 

 of the curves from any point of the horizontal line shows how 

 many among each one hundred individuals have the stature rep- 

 resented by that particular point. Thus it will be seen that 14*4 

 per cent of the full-blood men of the tallest class have a stature 

 of 172 centimetres, while only 12"3 per cent of the half blood of 

 the same class have the most frequent stature belonging to them 

 namely, 178 centimetres. Among the Indian women of the full- 

 blood tribes 16'8 per cent have a stature of 158 centimetres, while 

 only 14"4 per cent of the half bloods have their most frequent 

 stature namely, 160 centimetres. 



This tabulation brings out the peculiarity that the statures of 

 the half bloods are throughout higher than those of the full 

 bloods ; and that, at the same time, the most frequent statures 

 are more frequent among the pure race than in the mixed race. 

 This is expressed by the fact that the curves illustrating the dis- 



