SOCIAL PROBLEMS OF RECENT IMMIGRATION 49/ 
When a country in its nation building, however, uses 
in the process thirty to forty races as material, it is of 
the greatest importance to the country in question to 
know what material is satisfactory and what is 
not. It is reasonable to assume that out of so many 
races now coming into the United States, some will 
fail, some will fit in moderately well with the native 
stock, while still others will be peculiarly adapted to 
become a valuable part of the American racial 
composition. 
Viscount Bryce, in his study of American history, 
in speaking of the effects of immigration puts the 
question in this way: “Here we are met by a question 
which has never arisen before, either on so great a 
scale, or under conditions which enabled it to be so care 
fully observed—a question needing examination by 
physiologists and anthropologists as well as by histor 
ians. There have been many cases of race intermixture, 
but in extremely few of these have we statistical rec 
ords sufficient to furnish data for scientific conclusions. 
The problem may be stated as follows: When two or 
Wore races mix their blood what is the comparative 
importance of blood, i.e., of heredity, on the one hand, 
and of environment on the other, in determining the 
quality of the race which arises from the mixture? 
* * * To what extent then will these racial tendencies 
pass into and modify the American mass? 
Reliable statistics along these lines are also impor 
tant from the viewpoint of directing health campaigns 
among different races. 
Paupers 
Altho in the earlier days before strict regulation 
of immigration had been provided by law many poor