Any appropriations made to or for the benefit of any such circuit by the general assembly shall be made through the Missouri state department of agriculture and specified in the biennial appropriations to said state department to be for such purpose, and when so made shall be by the director of agriculture paid to the treasurer of said circuit in equal annual installments, and when so paid shall be by said circuit used in such manner as may by said circuit be deemed best for the promotion of the agricultural interests and the general interest in raising and breeding stock of all classes in the state of Missouri; provided, that such appropriations shall be used only in payment for advertising, printing of catalogues, payments of premiums or purses for the general benefit of the whole circuit, or divided equally between the members of such circuit and disbursed in same manner for the benefit of such member.