No. 16215. Argued June 5, 1961. Decided June 29, 1961. Mr. James C. Paras, Atty., N.L.R.B., with whom Messrs. Stuart Rothman, Gen. Counsel, N.L.R.B., Dominick L. Manoli, Associate Gen. Counsel, N.L.R.B., Marcel Mallet-Prevost, Asst. Gen. Counsel, N.L.R.B., and Allison W. Brown, Jr., Atty., N.L.R.B., Washington, D.C., were on the brief, for appellant. Mr. Sanford H. Markham, of the bar of the Court of Appeals of New York, pro hac vice, by special leave of court, New York City, for appellee. Messrs