608 THE AMERICAN NATURALIST. [VoL. XXXIII. 
Color of Hair and Eyes.— These characters allow us to distinguish 
two types in Bohemia ; namely, the blonde, which prevails in the north 
and in the more mixed districts, and the dark, which prevails in the 
south and throughout the more purely Bohemian districts. In Prague 
and other large cities considerable mixture of these two types occurs. 
According to all indications, the dark type is gradually gaining on 
the blonde. Among children the hair, which is often light in early 
age, as years advance, in many cases rapidly becomes darker. The 
color of the eyes is more stable.’ Red hair is exceptional (1.9 per cent). 
The dark type of children shows certain physical advantages over the 
light type, but the medium or mixed type surpasses both and has 
apparently the best chances of existence. 
Influence of the Occupation or Social Position of Parents on the 
Physical Condition of the Children. — This subject is naturally very 
complex. The results of the investigation show that the physical 
development of the children corresponds (æ) to that of the parents, 
and (ġ) to the kind and abundance of food and the degree of other 
hygienic conditions. The children of butchers and dealers in smoked 
meat are among the best developed ; on the other hand, the children 
of shoemakers and those of railroad employees are among those that 
show most defects of development. The results indicate that the 
physical state of a child is partly due to heredity, partly to acquisi- 
tion. Children of immigrants (from the country) are in a somewhat 
better physical condition than city-born children. 
Morals and Abilities. —The best-developed children show the largest 
percentage of able children, and vice versa. This is in accord with 
the results obtained by Gracianov (Russia), Sack (Russia), Porter 
(St. Louis). The extremes of the blonde and the dark type show 
smaller proportions of able children than the middle type. The more 
able children show larger average circumferences of the skull than 
the less able. The most prevalent form of the head among the able 
Bohemian children is a moderate brachycephaly. 
As to the relation of the morals and physical condition of the chil- 
dren, nothing definite can be said. The size of the head of moral 
children seems to be, on the average, slightly greater than that of 
immoral individuals. 
Diseases of Childhood, — The author finds that children with light 
hair and light eyes, hence the blonde type, are more frequently 
attacked by various infectious diseases of childhood. Boys with dark 
eyes are attacked by measles and variola with a little more fre- 
quency than boys with blue eyes. The most favorable conditions are 
