TWINS FROM TWO DISTINCT EGG CELLS 
As they are of different sexes, it is probable that they are not from the same egg cell; and the 
difference in their appearance, at first sight, is considerable. 
that the hair is the only visible feature in which they differ widely. 
(Fig. 3.) 
The Nursery Studio, Washington, D. C. 
For example, it is stated” that in 
Prussia one birth in eighty-nine results 
in twins; in Naples, one in 158; in 
Russia, one in thirty-two, etc. In 
certain provinces of China twins are 
said to be almost unknown. Of the 
75,030 births recorded in St. Louis 
10 Textbooks of obstetrics, etc. 
births, the Russian on 6,000,000, 
200 
But closer examination shows 
Photograph from 
during the five years from February, 
1910, to February, 1915, 828 are re- 
ported as twins or triplets. This indi- 
cates that the incidence of multiple 
births here is about one to 90.6. Of 
course these figures tell nothing of the 
relative frequency of the different classes 
The Prussian statistics are said to be based on 13,000,000 
