No. 9792. Argued June 15, 1948. Decided September 27, 1948. Rehearing March 28, 1949. Decided October 31, 1949. Mr. Robert Todd McKinlay, Attorney, National Labor Relations Board, Washington, D.C., with whom Mr. David P. Findling, Associate General Counsel, National Labor Relations Board, Miss Ruth Weyand, Acting Assistant General Counsel, National Labor Relations Board, and Mr. Ben Grodsky, Attorney, National Labor Relations Board, Washington, D.C., were on the brief, for petitioner. Mr. William