No. 10230. Argued December 20, 1949. Decided February 13, 1950. Mr. Gerald D. Reilly, Washington, D.C., for petitioner. Mr. William Feldesman, Assistant General Counsel, National Labor Relations Board, Washington, D.C., of the Bar of the Court of Appeals of New York, pro hac vice, by special leave of Court, with whom Mr. A. Norman Somers, Assistant General Counsel, National Labor Relations Board, Washington, D.C., was on the brief, for respondent. Mrs. Rose Mary Filipowicz, Washington, D.C., also