
    No. 513.
    United States v. Cannelton Sewer Pipe Co.
    
      Robert E. Lee Hall and Richard L. Hirshberg for the National Coal Association.
   Certiorari, 361 U. S. 923, to the United States Court of Appeals for the Seventh Circuit. The motion of the National Coal Association for leave to file brief, as amicus curiae, is granted.  