Clavis usuræ; or, a key to interest, both simple and compound: containing practical rules, ... To which is added, rules to be observ'd in estimating the value of annuities, or leases, ... By J. Ward.
Ward, John,active 1698-1709.
London : printed by J.M. for William Taylor,
1710.
With a table of logarithms, for numbers from 1 to 10,000.
Goldsmiths' 4630
ESTC