An Act amending the act of July 19, 1917 (P. L. 1117, No. 378), entitled "An act providing for the establishment, in cities of the first class, of a house or houses of detention for witnesses and untried prisoners; for the commitment of such prisoners and witnesses thereto; and for the payment of the cost of establishing and maintaining the same by the county wherein said cities are situated," providing for frequency of meetings of board of managers at the house of detention.