AUTHOR OF ARITHMETIC, ELEMENTARY ALGEBRA, ELEMENTARY GEOMETRY, OWS, AND PERSPECTIVE. NEW YORK: PUBLISHED BY A. S. BARNES & CO. 1845. Q.A 154 025 DAVIES' ¥45 COURSE OF MATHEMATICS. DAVIES' FIRST LESSONS IN ARITHMETIC, DESIGNED FOR BEGINNERS. DAVIES' ARITHMETIC, KEY TO DAVIES' ARITHMETIC. DAVIES' ELEMENTARY ALGEBRA: Being an introduction to the Science. KEY TO DAVIES' ELEMENTARY ALGEBRA. DAVIES' ELEMENTARY GEOMETRY. This work embraces the elementary principles of Geometry. The reasoning is plain and concise, but at the same time strictly rigorous. DAVIES' PRACTICAL GEOMETRY, Embracing the facts of Geometry, with applications in ARTIFICER'S WORK, MEN. SURATION, and MECHANICAL PHILOSOPHY. DAVIES' BOURDON'S ALGERRA, Being an abridgment of the work of M. Bourdon, with the addition of practical examples. DAVIES' LEGENDRE'S GEOMETRY AND TRIGONOMETRY, Being an abridgment of the work of M. Legendre, with the addition of a Treatise on MENSURATION OF PLANES AND SOLIDs, and a Table of LOGARITHMS and LOGARITHMIC SINES. DAVIES' SURVEYING, Department-an explanation of the method of surveying NAVIGATION DAVIES' ANALYTICAL GEOMETRY, Embracing the EQUATIONS OF THE Point AND STRAIGHT LINE—of the Conic SecTIONS—of the LINE AND PLANE IN SPACE-also, the discussion of the GENERAL EQUATION of the second degree, and of SURFACES OF THE SECOND ORDER. DAVIES' DESCRIPTIVE GEOMETRY, DAVIES' SHADOWS AND LINEAR PERSPECTIVE. DAVIES' DIFFERENTIAL AND INTEGRAL CALCULUS. Entered, according to Act of Congress, in the year 1844, BY CHARLES DAVIES, in the Clerk's Office of the District Court of the United States, fur the Southern District of New York. C. A. ALVORD, PRINTER, corner of John and Dutch Street, New York. PREFACE THE Treatise on Algebra, by M. Bourdon, is a work of singular excellence and merit. In France, it is one of the leading text books. Shortly after its first publication, it passed through several editions, and has formed the basis of every subsequent work on the subject of Algebra. The original work is, however, a full and complete treatise on the subject of Algebra, the later editions containing about eight hundred pages octavo. The time which is given to the study of Algebra, in this country, even in those seminaries where the course of mathematics is the fullest, is too short to accomplish so voluminous a work, and hence it has been found necessary either to modify it, or to abandon it altogether. The following work is abridged from a translation of M. Bourdon, made by Lieut. Ross, now the distinguished professor of mathematics in Kenyon College, Ohio. The Algebra of M. Bourdon, however, has been regarded only as a standard or model. The order of arrangement, in nany parts, has been changed; new rules and new methods have been introduced ; and all the modifications which have |