s in Elementary Science._

D. C. HEATH & CO., Publishers, Boston, New York, Chicago

Mathematics.

=Anthony and Ashley's Descriptive Geometry.= $2.00.

=Barton's Plane Surveying.= With complete tables. $1.50.

=Barton's Theory Of Equations.= A treatise for college classes. $1.50.

=Bauer and Brooke's Trigonometry.= Plane and spherical. $1.50.

=Bowser's College Algebra.= A full treatment of elementary and
advanced topics. $1.50.

=Bowser's Elements of Plane and Spherical Trigonometry.= 90 cts.; with
tables, $1.40.

=Bowser's Treatise on Plane and Spherical Trigonometry.= $1.50.

=Bowser's Five-Place Logarithmic Tables.= 50 cts.

=Candy's Plane and Solid Analytic Geometry.= $1.50. With supplement,
$2.00.

=Cohen's Differential Equations.= $2.00.

=Cohen's Introduction to the Lie Theory.= $2.00.

=Fine's Number System in Algebra.= Theoretical and historical. $1.00.

=Gilbert's Algebra Lessons.= Three numbers: No. 1, to Fractional
Equations; No. 2, through Quadratic Equations; No. 3, Higher Algebra.
Each number, per dozen, $1.44.

=Hopkins's Plane Geometry.= Follows the inductive method. 75 cts.

=Lyman's Geometry Exercises.= Supplementary work for drill. Per dozen,
$1.60.

=McCurdy's Exercise Book in Algebra.= A thorough drill book. 60 cts.

=Nichols's Analytic Geometry.= A treatise for college courses. $1.25.

=Nichols's Calculus.= Differential and Integral. $2.00.

=Osborne's Differential and Integral Calculus.= Revised. $2.00.

=Peterson and Baldwin's Problems in Algebra.= For texts and reviews.
30 cts.

=Robbins's Surveying and Navigation.= A brief and practical treatise.
50 cts.

=Waldo's Descriptive Geometry.= Contains a large number of problems.
80 cts.

=Well's Academic Arithmetic.= With or without answers. $1.00.

=Wells and Hart's First Year Algebra.= 90 cts.

=Wells's Algebra for Secondary Schools.= $1.20.

=Wells's Text-Book in Algebra.= A maximum elementary course. $1.40.

=Wells's Essentials of Algebra.= For secondary schools. $1.10.

=Wells's Academic Algebra.= With or without answers. $1.08.

=Wells's New Higher Algebra.= For schools and colleges. $1.32.

=Wells's University Algebra.= Octavo. $1.50.

=Wells's College Algebra.= $1.50. Part II, beginning with quadratics.
$1.32.

=Wells's Advanced Course in Algebra.= $1.50.

=Wells's New Geometry.= $1.25. PLANE, 75 cts. SOLID, 75 cts.

=Wells's Essentials of Geometry.= $1.25. PLANE, 75 cts. SOLID, 75 cts.

=Wel