The ground of artes [electronic resource] : teaching the perfect vvorke and practise of arithmeticke, both in whole numbers and fractions, after a more easie and exact sort, than hitherto hath beene set foorth. Made by M. Robert Record, D. in Physicke. And now lately diligently corrected and beautified with sundry new rules and necessary additions: and further endowed with a third part of rules of practise abridged into abriefer [sic] method than hitherto hath bene published: with diuerse such necessarie rules as are incident to the trade of merchandise. Whereunto are also added diuerse tables and instructions that will bring great profite and delight vnto merchants, gentlemen, and others, as by the contents of this treatise shall appeare. By Iohn Mellis.