
    No. 746.
    No. 747.
    
      Edward B. Hayes for appellants in No. 746. Harold E. Spencer, Richard M. Freeman and J. S. Chartrand for appellant in No. 747: Solicitor General Cox, Assistant Attorney General Loevinger and Robert B. Hummel for the United States; Robert W. Ginnane and H. Neü Garson for the Interstate Commerce Commission; Richard J. Murphy for the New York Central Railroad Co.; and Leo P. Day for McNabb Grain Co. et al., appellees.
    
      A. L. Mechling Barge Lines, Inc., et al. v. United States et al.; and Board of Trade of Chicago v. United States et al.
   Appeals from the United States District Court for the Northern. District of Illinois. Probable jurisdiction noted.  