The board of county commissioners of any county which levied a tax under the provisions of Kan. Stat. Ann. §§ 19-1563 or 19-1569 prior to the repeal of either of said statutes is hereby authorized to use the proceeds of such levy or levies together with the proceeds of the sale of general obligation bonds, and tax levies made under the provisions of this act and the proceeds of the sale of general obligation bonds and the levy of taxes under the provisions of Kan. Stat. Ann. § 19-15,116, for the purpose of building or constructing, equipping and furnishing a courthouse and jail or for any one or more of such purposes for such county and to pay a portion of the principal and interest on bonds issued under the authority of Kan. Stat. Ann. § 12-1774, and amendments thereto, by cities located in the county.