
    No. 73.
    Radiant Burners, Inc., v. Peoples Gas Light & Coke Co. et al.
    
      Solicitor General Rankin for the United States.
   Certiorari, 363 U. S. 809, to the United States Court of Appeals for the Seventh Circuit. The motion of the Solicitor General for leave to participate in oral argument, as amicus curiae, is granted.  