No. 273, Docket 23888. Argued March 14, 1956. Decided June 7, 1956. Emanuel Friedman, New York City (Sidney S. Grant, Grant Angoff, Boston, Mass., of counsel on the brief), for petitioner. Theophil C. Kammholz, Gen. Counsel, David P. Findling, Associate Gen. Counsel; Marcel Mallet-Prevost, Asst. Gen. Counsel, Arnold Ordman and Rose Mary Filipowicz, Attys., National Labor Relations Board, Washington, D.C., for respondent. Myron P. Gordon, New York City, for intervenor. Before FRANK, LUMBARD and WATERMAN