opinion: No. 253.
  United States v. Pullman Company et al.; Otis & Co. v. United States et al.; Chesapeake & Ohio Railroad Co. et al. v. United States et al.; and Glore, Forgan & Co. v. United States et al.
  No. 254.
  No. 255.
  No. 256.
  Argued March 11, 12, 13, 1947.
  Decided March 31, 1947.
  Holmes Baldridge argued the cause for the United States. With him on the brief were Acting Solicitor General Washington and Assistant Attorney General Berge. Thurman Arnold argued the cause for appellant in No. 254. With him on the brief was Arne C. Wiprud. Robert J. Bulkley argued the cause for appellants in No. 255. With him on the brief were Frank J. Meistrell and Herbert G. Pillen. Leo F. Tierney argued the cause for appellant in No. 256. With him on the brief was Louis A. Kohn. George Wharton Pepper argued the cause for the Pullman Company et al., appellees. With him on the brief were Ralph M. Shaw, Seth W. Richardson, Lowell M. Greenlaw, Frederick H. Spotts and Guy A. Gladson. Jacob Aronson argued the cause for the railroad appellees. With him on the brief were Emmett E. Mclnnis, Sydney R. Prince, Harold H. McLean, Henry L. Walker and Albert Ward. Appearances were entered by Francis H. Scheetz for appellant in No. 256; John Dickinson for the Atchison, Topeka & Santa Fe Railway Co. et al.; and Leo J. Hassenauer, V. C. Shuttle-worth and H. E. Wilmarth for the Order of Railway Conductors of America, appellees.
  Per Curiam:
  The judgment is affirmed by an equally divided Court.
  Mr. Justice Jackson took no part in the consideration or decision of these cases.