William Wheaton of the University of Pennsylvania estimates that inmigration to Philadelphia has dropped 50 percent. because sources are beginning to dry up. Irene Taeuber of the office of population research. Princeton University. confirms this: "The great reservoirs of Negroes in southern agriculture are so reduced that they can furnish only a fraction of the migrants of the future." Hence the tide has probably passed its peak. But even if rural sources were -to dry up completely tomorrow. cities would still have the gigantic problem of assimilating the nearly 2 million persons. largely lowincome Negroes. who have moved into northern cities in the past two decades.
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migrants