The money postponed by municipality or corporation to ship a debt in certain future time, name

The money postponed by municipality or corporation to ship a debt in certain future time, name decreasing fund. For example, if the city should let out twenty years" bonds for 100 000$ to provide money for the street improvements, all debt would come in twenty years, but to avoid to have such considerable quantity come in one year, the proportional sum is bypassed every year as decreasing fund that is, to ship, either to reduce, or to wipe debts when bonds become ripe. Bonds are not paid before a maturity.
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INTEREST COUPONS
Copies of coupons of interest.