A Treatise of Algebra, in Three Parts. Containing I. The Fundamental Rules and Operation. II. The Composition and Resolution of Equations of All Degrees ; and the Different Affections of Their Roots. III. The Application of Algebra and Geometry to Each Other. To which is Added an Appendix, Concerning the General Properties of Geometrical Lines. By Colin MacLaurin, M.A. Late Professor of Mathematicks in the University of Edinburgh, and Fellow of the Royal Society