It shall be the general duty of the county clerk: First, to record, in a book to be provided for that purpose, all proceedings of the board; second, to make regular entries of their resolutions and decisions in all questions concerning the raising of money; third, to record the vote of each commissioner on any question submitted to the board, if required by any member; fourth, sign all orders issued by the board for the payment of money; fifth, to preserve and file all accounts acted upon by the board, with their action thereon; and he shall perform such special duties as are required of him by law.