Dr. Hirsch acted as arbitrator, and his findings settled the differences between the Firemen's Union and the Building Manager's Association. In a second arbitration, Dr. Hirsch settled the dispute between the Stationary Engineer's Union and the Building Manager's Association.

The Doctor is now sitting with Judge Sears and Prentiss as a Board of Arbitration convened to consider the differences between the Chicago City Railway Co. and its employees.