Every Justice of the Peace before whom any Person shall be convicted of any Offence against this Act shall transmit the Conviction to the next Court of General or Quarter Sessions which shall be holden for the County or Place wherein the Offence shall have been committed, there to be kept by the proper Officer among the Records of the Court; and upon any Indictment or Information against any Person for a subsequent Offence, a Copy of such Conviction, certified by the proper Officer of the Court, or proved to be a true Copy, shall be sufficient Evidence to prove a Conviction for the former Offence, and the Conviction shall be presumed to have been unappealed against until the contrary be shown.