Act of August 26, 1937 (50 Stat. 844, 850), Act of October 17, 1940 (54 Stat. 1198, 1199), Act of October 14, 1949 (63 Stat. 852), and Act of September 26, 1950 (64 Stat. 1036), referred to in text, are acts Aug. 26, 1937, ch. 832, 50 Stat. 844; Oct. 17, 1940, ch. 895, 54 Stat. 1198; Oct. 14, 1949, ch. 690, 63 Stat. 852; Sept. 26, 1950, ch. 1047, 64 Stat. 1036, which were not classified to the Code.