An Act amending the act of May 20, 1915 (P. L. 566, No. 242), entitled "An act requiring cities of the first class to establish a pension fund for employes of said cities, and all county or other public employes, if any, paid by appropriation of the city councils thereof, and out of the treasury of said cities; and regulating the administration and the payment of such pensions," further providing for payments by the city and public employees to the board of pensions.