
    (No. 6549
    Sun Oil Company of Pennsylvania, Claimant, vs. State of Illinois, Department of Aeronautics, Respondent.
    
      Opinion filed May 9, 1972.
    
    Sun Oil Company of Pennsylvania, Claimant, pro se.
    William J. Scott, Attorney General; William E. Webber, Assistant Attorney General, for Respondent.
   Perlin, C.J.  