
    (No. 6620
    Central Office Equipment Company, Claimant, vs. State of Illinois, Department of Public Instruction, Respondent.
    
      Opinion filed September 5, 1972.
    
    Drach, Terrell and Deffenbaugh, Attorney for Claimant.
    William J. Scott, Attorney General; William E. Webber, Assistant Attorney General, for Respondent.
   Perlin, C.J.  