The Melting-Pot Mistake.Henry Pratt FairchildEugenics and Politics.Ferdinand Canning Scott SchillerTemperament and Race.S. D. Porteus , Marjorie E. BabcockIntelligence and Immigration.Clifford KirkpatrickThe Immigration Problem. A Study of American Immigration Conditions and Needs.Jeremiah W. Jenks , W. Jett Lauck , Rufus D. Smith