Section 6
SEC. 6. A sinking fund is hereby created for the payment of the insular bonds issued under the provisions of this Act, in such manner that the total amount thereof at each annual due date of the bond issue shall be equal to the total of an annuity of nineteen hundred and thirty-seven pesos and thirteen centavos for each one hundred thousand pesos of bonds outstanding, accrued at the rate of interest of three and one-half per centum per annum. Said fund shall be under the custody of the Treasurer of the Philippine Islands, who shall invest the same, in such manner as the Secretary of Finance may approve, in accordance with the provisions of Act Numbered Three thousand and fourteen governing the investment of sinking funds; shall charge all the expenses of such investment to said sinking fund, and shall credit to the same the interest on investments and other income belonging to it.