
    No. 150.
    Silver, doing business as Municipal Securities Co., et al. v. New York Stock Exchange.
    
      Solicitor General Cox on the motion.
   Certiorari, ante, p. 808, to the United States Court of Appeals for the Second Circuit. The motion of the Solicitor General, on behalf of the United States, for leave to participate in oral argument, as amicus curiae, is granted and thirty minutes are allotted for that purpose. Counsel for the petitioners and the respondent are also allotted an additional fifteen minutes to argue in this case.  