An Act amending the act of June 23, 1931 (P.L.1178, No.319), entitled "An act declaring buildings and parts of buildings used for purposes of fornication, lewdness, assignation, and prostitution to be nuisances;....," further providing for building used for fornication as nuisance, for knowledge of unlawful use by owner, for abatement of nuisance, violation of abatement order or injunction and for violation of act.