Du Pont de Nemours, E. I., & Company. Nos.—, —, in Supreme Court of United States, Oct. term, 1940, National Labor Relations Board v. E. I. du Pont de Nemours & Company; [same] v. Association of Chemical Employees at Belle Works of E. I. du Pont de Nemours & Company; petition for writs of certiorari to circuit court of appeals for 4th circuit.