A president for purchasers, sellers, and mortgages, or, Anatocisme (commonly called compound interest) made easie, without arithmetical calculation : by a table ready computed, by which may be known the real worth of any annuity, rent or pension, either in present possession, or in reversion (to be paid annually) at six pounds in the hundred (interest upon interest) from one year to an hundred years, and from 20 s. a year to 100, 500, 1000 l. a year and upward, onely by common addition / computed by W. Leybourn.