
    Yeadon School District Appeal.
    Argued September 22, 1970.
    
      Joseph T. Labrum, Jr., with him Fronefield, deFuria and Petrikin, for appellant;
    
      Donald M. McCurdy, with him Philip B. Driver, Jr., and Fox and McCurdy, for Interboro Joint School System, intervening appellee;
    
      Patrick E. Wash-Speaker, Attorney General, for State Boardof Educaington, Deputy Attorney General, with him Fred tion, appellee.
   Decree affirmed.  