
    448 A.2d 1177
    Gerrero, Appellant v. United Gilsonite Lab.
    Petition for Allowance of Appeal Denied Jan. 14, 1983.
    Argued October 13, 1981.
    James R. Duffy, for appellant; James F. Malone, III, for appellees.
    Before JOHNSON, MONTEMURO and MONTGOMERY, JJ.
   Judgment affirmed.  