No. 5037. Heard December 6, 1955. Decided February 28, 1956. Harold Kowal, Field Atty., Boston, Mass., with whom Theophil C. Kammholz, Gen. Counsel, David P. Findling, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Samuel M. Singer and Nancy M. Sherman, Washington, D.C., Attys., were on brief, for petitioner. Sidney W. Wernick, Portland, Me., with whom Berman, Berman Wernick, Portland, Me., were on brief, for respondent. Before MAGRUDER, Chief Judge, and WOODBURY and HARTIGAN