
    Underground Construction Company, appellee, v. The Sanitary District of Chicago, appellant.
    Gen. No. 39,186.
    Opinion filed February 15, 1937.
    Ernest Buehler, Lawrence J. Fenlon, William C. Oehlsen and Thomas F. Donovan, for appellant. John L. Melnerney and Luella Either, for appellee.
   Mr. Justice MeSurely

delivered the opinion of the court.  