No. 15926. May 25, 1967. Rehearing Denied August 8, 1967. Marcel Mallet-Prevost, Asst. Gen. Counsel, Peter M. Giesey, Atty., Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, George B. Driesen, Peter M. Giesey, Attys., N.L.R.B., Washington, D.C., for petitioner. Richard F. Watt, Eugene Cotton, Drew S. Days III, Cotton, Watt, Jones King, Chicago, Ill., for intervenor. Arthur R. Donovan, Joseph A. Yocum, Evansville, Ind., Martin J. Burns, Chicago, Ill., Harry P. Dees, Joseph