230 THE TREND OF THE RACE 
dark-eyed women more than light-eyed. In stature the tendency 
to assortative mating was marked; the tall tend to marry with 
tall, the short with short, and the intermediate with intermediate. 
H. Ellis has added confirmatory evidence of assortative mating of 
people of similar stature. He found that people tend to marry 
those similar to themselves in complexion, although the number of 
cases considered was too small to base a positive conclusion upon. 
There is evidence that the tuberculous tend to marry the tubercu- 
lous, due in part probably to the influences that bring them to- 
gether in the same localities, and in part to a natural sympathy 
which draws them together, and also to the fact that they are less 
liable to be chosen by normal and healthy persons. That the 
deaf tend to marry the deaf, as has been shown by Fay and Bell, 
is due largely to the segregation of these people in institutions, 
although the two other causes we have just mentioned may also 
be influential upon those who remain scattered among the general 
population. 
One of the most unfortunate kinds of assortative mating in 
man, as has been pointed out in a previous chapter, is the unusual 
frequency of marriages among the feeble-minded and degenerate. 
The unattractive physical and temperamental qualities which 
would be a bar to mating among people of higher grade are not so 
potent a deterrent to matrimony or at least to a union of the sexes 
among inferior stocks. What data have been collected on the 
proportion of married people of marriageable age among the 
Jukes indicate that there are relatively more of them married than 
among people in general. In this family as in the Kallikaks, 
Zeroes, Nams, and Hill Folk early marriages were customary. Of 
the Hill Folk Danielson and Davenport remark that, ‘‘The large 
majority of the matings which are represented in this report are of 
defectives with defectives. A few of those who have drifted into 
a different part of the country have married persons of a higher 
degree of intelligence, but the most of such wanderers have, even 
in a new location, found mates who were about their equal in 
intelligence and ambition.”’ This condition is typical of similar 
families. 
