
    Dennis J. Carroll, appellee, v. Thomas J. Houston, et al., appellants.
    Gen. No. 33,340.
    Opinion filed April 22, 1929.
    Rehearing denied May 6, 1929.
    Samuel A. Ettelson, Corporation Counsel, James W. Breen, First Assistant Corporation Counsel and Francis J. Vurpillat, Assistant Corporation Counsel, for appellants; Francis J. Vurpillat, of counsel on the brief. Benjamin C. Bachrach, for appellee.
   Mr. Justice McSurely

delivered the opinion of the court.  