Tables of interest, at three and a half, four, four and a half, five, five and a half, and at six per cent. per ann [electronic resource] : Together with two tables, for finding the number of weeks between any two days, in a year, consisting of 365 days. To all which is prefixed, the new table of coin. The whole calculated in manuscript, and corrected at the press, By John Watson, Bookseller.