
    (No. 6100
    Nalco Chemical Company, Claimant, vs. State of Illinois, Divison of Highways, Respondent.
    
      Opinion filed August 30, 1971.
    
    L. H. Lemieux, Attorney for Claimant.
    William J. Scott, Attorney General; Saul R. Wexler, Assistant Attorney General, for Respondent.
   Perlin, C.J.  