1 68 Negro Migration 



problem of Negro population, institutions, or race relations 

 would do well to bear in mind constantly the tendency to 

 change and make allowance for this tendency in reaching 

 his conclusions, otherwise the result of a study made at a 

 stated time may lead to conclusions which are true enough 

 for the time, but which are completely altered a few months 

 afterward. This is to be considered in all surveys, for 

 migration is not only constantly changing the distribution 

 of Negro population, but as this chapter indicates, it is 

 also constantly changing the sex composition, fecundity, 

 vitality, crime and insanity rates, economic organization, 

 religious and educational institutions, and relations with the 

 white group. 



The effects of migration also vitiate comparisons between 

 sections of the country unequally affected unless these effects 

 are known and unless allowance is made for them. 



