No. 6968. Argued May 23, 1955. Decided July 25, 1955. Fannie M. Boyls, Atty., N.L.R.B., Washington, D.C. (Theophil C. Kammholz, Gen. Counsel, N.L.R.B., Chicago, Ill., David P. Findling, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Ruth V. Reel, Atty., N.L.R.B., Washington, D.C., on the brief), for petitioner. Joseph F. Castiello, Washington, D.C. (Nathaniel Goldberg and Martin J. Kirsch, Washington, D.C., on the brief), for respondent. Before PARKER, Chief Judge, and SOPER