
    No. 153.
    United States ex rel. American Silver Producers Ass’n et al. v. Mellon, Secretary of the Treasury, et al.
    
      Messrs. Charles S. Thomas, J. Harry Covington, George K. Thomas, and Spencer Gordon for petitioners.
    
      Solicitor General Hughes, Assistant Attorney General Farnum, and Mr. John T. Fowler, Jr., for respondents.-
    October 14, 1929.
   Petition for writ of certiorari to the Court of Appeals of the District of Columbia denied.  