No money may be paid out by a district except upon an order signed by the chairman and secretary of such board, or such other person or persons authorized by the chairman or secretary, as the case may be, to sign such orders on their behalf. Each order for the payment of money shall specify the purposes for which the amount thereof is to be paid, with sufficient clearness to indicate the purpose for which the order is issued, and there shall be endorsed thereon the name of the particular fund out of which it is payable and it shall be payable from the fund constituted for such purpose, and no other. All such orders shall be reflected in the minutes of the next meeting of the board.