
    No. 667.
    A. L. Mechling Barge Lines, Inc., et al. v. United States et al.
    
      Edward B. Hayes for appellants.
    
      Solicitor General Cox, Acting Assistant Attorney General Kirkpatrick, Richard A. Solomon, Robert W. Ginnane and H. Neil Garson for the United States and the Interstate Commerce Commission, appellees.
    
      Robert H. Bierma, James M. Souby, Jr. and James E. Steffarud for the Pennsylvania Railroad Co. et al., intervening appellees.
   Appeal from the United States District Court for the Eastern District of Missouri. Further consideration of the question of jurisdiction postponed to the hearing of the case on the merits.  