Record's arithmetick, or, The ground of arts [electronic resource] : the perfect work and practice of arithmetick, both in whole numbers and fractions, after a more easie and exact form then in former time hath been set forth / made by Robert Record ; afterwards augmented by John Dee ; and since enlarged with a third part of rules of practice ... by John Mellis ; and now diligently perused, corrected, illustrated and inlarged, with an appendix of figurative numbers and the extraction of their roots ... diligently calculated by Ro. Hartwell.