Vulgar arithmetick improved [electronic resource], or, merchants accompts made easy. Containing great variety of improvements in all those rules of arithmetick, which commonly go under that Title; but especially the Golden Rule and Practice, as they are the Ground, and Foundation of all the rest, are largely insisted on. With an appendix, containing XXVI compendious methods of casting up most sorts of merchandise, never before published. The whole perform'd by whole Numbers only, and applyed throughout to Trade and Merchandise. By Henry Gore, Teacher of the Mathematicks, in Manchester.