An Act repealing the act of May 23, 1919 (P.L.255, No.136), entitled "An act authorizing the county commissioners of any county and the corporate authorities of any city of the third class located within such county, to erect a joint county and city building or buildings to be used for hospital purposes; providing for the selection of a site by purchase, condemnation, or otherwise; authorizing the county or city to sell real estate under certain conditions; providing for the contracts and agreements to be entered into by the county and city; and authorizing the county and city to issue bonds for certain purposes."