1903 private laws – Ch.404 Sec.15

That to provide for the interest on said bonds, and their redemption at or before maturity, the Board of County Commissioners aforesaid, or the Board of Aldermen, or Board of Commissioners or other municipal authorities aforesaid, subscribing, shall, in addition to other taxes, each year compute and levy on all property of any such county, township, city or town as may make a subscription of bonds to the said second-mortgage bonds, preserving the constitutional equation of taxation, a sufficient tax to pay such interest, and an additional tax sufficient to provide each year a sum equal to one-thirtieth part of the principal of said bonds for a sinking fund, which amount shall annually be collected as the other taxes are, and paid to the County Treasurer or other officer of said county, city or town authorized by law to perform the duties of Treasurer or Commissioner of Sinking Fund, and by him invested in said bonds, which shall be cancelled by the County Commissioners or the municipal authorities of the city or town, as the case may be; but in case said Treasurer or other officer shall be unable to invest the sinking fund herein provided for in said bonds at or about par value, he shall invest the same in solvent bonds or securities-as may be selected and approved by the County Commissioners aforesaid, or the proper authorities of any city or town, as the case may be, subscribing to the second-mortgage bonds of said railroad company.