Public [act] 609-770½, 771-774, 74th Congress. Northern Pacific Railway. S. 4594, act to supplement act of June 25, 1929 (ch. 41, 46 Stat. L. 41), which authorized and directed Attorney General to institute suit against Northern Pacific Railway Company and others [so as to allow direct review by Supreme Court of certain orders and decrees in said suit, by appeal].