§ 7-4. Investment of interest.

The interest upon said investment so as aforesaid directed to be made, shall also be invested from time to time, as the same shall be received, in the public debt of the City of Baltimore, and such investments of said interest, and of the interest upon said interest, shall also constitute a part of said sinking fund; and said investment of said interest, and of interest on said interest, shall continue so to be made in the public debt of the City of Baltimore until the annual income from said investments shall reach the sum of $50,000; and in the meanwhile, the sum of $50,000, to pay said annuity, shall be levied for as other city taxes are levied for.