No. 9863. December 9, 1949. David P. Findling, Associate General Counsel, A. Norman Somers, Assistant General Counsel, National Labor Relations Board, Washington, D.C., Robert Ackerberg, Chief Law Officer, National Labor Relations Board, Chicago, Ill., Dominick L. Manoli and Rosanna A. Blake, Washington, D.C., for petitioner. James J. Cusack, Jr., John F. Cusack, Robert E. Cusack, Chicago, Ill., for intervenor LaSalle Steel Employees Ass'n, Inc. Lee C. Shaw, Charles D. Preston, Chicago, Ill., for