
    Lix, Inc. et al., Appellants, v. Duquesne Light Co.
    Argued April 12, 1973.
    
      Loyal H. Gregg and Cosmos J. Reale, with them Jones, Gregg, Creehan & Gerace, and Mwrovich, Reale and Fossee, for appellants; Robert E. Wayman, with, him Wayman, Irvin, Trushel & MoAuley, for appellee.
   Judgments affirmed.  