The proceeds of any negotiable notes or certificates of indebtedness issued under the provisions of this article shall be placed in a special fund and shall be expended only for the purpose or purposes for which they were issued as shown by the resolution authorizing the issuance thereof. If a balance shall remain of the proceeds of such notes or certificates of indebtedness after the purpose or purposes for which same were issued shall be accomplished, such balance shall forthwith be transferred to the special fund set up for the payment thereof in Section 37-59-107.