Nos. 14303, 14354. Argued December 8, 1958. Decided January 29, 1959. Mr. David E. Feller, Washington, D.C., with whom Messrs. Arthur J. Goldberg and Bernard Dunau, Washington, D.C., were on the brief, for petitioners in No. 14303. Miss Rosanna A. Blake, Atty., N.L.R.B., of the bar of the Court of Appeals of Kentucky, pro hac vice, by special leave of Court, with whom Messrs. Jerome D. Fenton, Gen. Counsel, Thomas J. McDermott, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and