Wood’s Rustless Coatings: Corrosion and Electrolysis of Iron and Steel 8vo, 4 00 =MATHEMATICS.= Baker’s Elliptic Functions 8vo, 1 50 * Bass’s Elements of Differential Calculus 12mo, 4 00 Briggs’s Elements of Plane Analytic Geometry 12mo, 1 00 Compton’s Manual of Logarithmic Computations 12mo, 1 50 Davis’s Introduction to the Logic of Algebra 8vo, 1 50 * Dickson’s College Algebra Large 12mo, 1 50 * Answers to Dickson’s College Algebra 8vo, paper, 25 * Introduction to the Theory of Algebraic Equations Large 12mo, 1 25 Halsted’s Elements of Geometry 8vo, 1 75 Elementary Synthetic Geometry 8vo, 1 50 Rational Geometry 12mo, 1 75 * Johnson’s Three-place Logarithmic Tables: Vest-pocket size paper, 15 100 copies for 5 00 * Mounted on heavy cardboard, 8 × 10 inches, 25 10 copies for 2 00 Elementary Treatise on the Integral Calculus Small 8vo, 1 50 Curve Tracing in Cartesian Co-ordinates 12mo, 1 00 Treatise on Ordinary and Partial Differential Equations Small 8vo, 3 50 Theory of Errors and the Method of Least Squares 12mo, 1 50 * Theoretical Mechanics 12mo, 3 00 Laplace’s Philosophical Essay on Probabilities. (Truscott and Emory.) 12mo, 2 00 * Ludlow and Bass. Elements of Trigonometry and Logarithmic and Other Tables 8vo, 3 00 Trigonometry and Tables published separately Each, 2 00 * Ludlow’s Logarithmic and Trigonometric Tables 8vo, 1 00 Maurer’s Technical Mechanics 8vo, 4 00 Merriman and Woodward’s Higher Mathematics 8vo, 5 00 Merriman’s Method of Least Squares 8vo, 2 00 Rice and Johnson’s Elementary Treatise on the Differential Calculus. Sm., 8vo, 3 00 Differential and Integral Calculus. 2 vols. in one Small 8vo, 2 50 Sabin’s Industrial and Artistic Technology of Paints and Varnish. (_In press._) Wood’s Elements of Co-ordinate Geometry 8vo, 2 00 Trigonometry: Analytical, Plane, and Spherical 12mo, 1 00 =MECHANICAL ENGINEERING.= =MATERIALS OF ENGINEERING, STEAM-ENGINES AND BOILERS.=