Appeals from the District Court of the United States for the Northern District of Ohio.

Appeal from the Supreme Court of the State of Ohio.

Mr. Joseph F. Smith, of Cleveland, Ohio, for appellant City of cleveland.

Mr. Ralph W. Edwards, of Cleveland, Ohio, for appellants, Boyle and others.

Mr. Watson Hover, of Cincinnati, Ohio, for appellees Guckenberger and another.

Mr. Robert L. Stern, of Washington, D.C., for the United States and Federal Public Housing Authority.

Mr. Francis M. Thompson, of Columbus, Ohio, for Ohio Real Estate Ass'n., amicus curiae.

Mr. Francis T. Bartlett, of Cincinnati, Ohio, for Cincinnati Metropolitan Housing Authority, amicus curiae.

Mr. Justice ROBERTS delivered the opinion of the Court.