A new and compendious treatise of arithmetick, [electronic resource] : in whole numbers and fractions, vulgar and decimal. Wherein all the Necessary Rules of this Science are laid down in the Plainest and most Familiar Terms, and the Reason and Foundation of them demonstrated. With a Large and Copious Appendix, Containing several useful Tables of Monies, Weights, and Measures; as likewise a great Variety of Instructive and Entertaining Questions, relating to all the different Branches of this Art: Intermix'd with familiar Directions, and many curious Remarks. The Whole being Design'd and Compos'd not only with a View of advancing the Young Students in the Practice of this Fundamental Part of the Mathematicks, but also for the Information of those who are desirous of being thoroughly skill'd in the Theory and Principles of it. By Thomas Weston, Late Master of the Academy at Greenwich.