Constitution of the State of Ohio Art. VIII, § 7

The faith of the state being pledged for the payment of its public debt, in order to provide therefor, there shall be created a sinking fund, which shall be sufficient to pay the accruing interest on such debt, and, annually, to reduce the principal thereof, by a sum not less than one hundred thousand dollars, increased yearly, and each and every year, by compounding, at the rate of six per cent. per annum.  The said sinking fund shall consist, of the net annual income of the public works and stocks owned by the State, of any other funds or resources that are, or may be, provided by law, and of such further sum, to be raised by taxation, as may be required for the purposes aforesaid.