The ground of arts : teaching the perfect worke and practise of arithmeticke, both in whole numbers and fractions, after a more easie and exact forme then in former time hath beene set foorth: made by Mr. Robert Record Dr. in Physick. Afterwards augmented by Mr. Iohn Dee. And since enlarged with a third part of rules of practise, abridged into a briefer method then hitherto hath been published, with diuers necessary rules incident to the trade of merchandise: with tables of the valuation of all coynes as they are currant at this present time: by Iohn Mellis. Whereunto is added a compendium of interest ... with a table of board and timber measure calculated by R.N. And now the second time diligently perused, corrected, illustrated and inlarged ... by Robert Hartwell, philomathematicus. New tables of interest vpon interest ... with the true value of annuities to be bought or sold, present, respited, or in reuersion: by R.C.