Part I, Descriptive, $1.00. Part II, Experimental. 60 cents.

=Ebbinghaus's Psychology.= A resume of modern psychology. $1.25.

=Fisher and Patterson's Elements of Physics.= 60 cents.

=Hyatt's Insecta.= A practical manual for students and teachers. Illustrated. $1.25.

=Linebarger's Text-Book of Physics.= With industrial applications. $1.25.

=Miller's Progressive Problems in Physics.= 60 cents.

=Newell's Descriptive Chemistry.= Illustrated. $1.20. Part I, Without experiments. $1.00. Part II, Experiments. 40 cents.

=Newell's Experimental Chemistry.= For high schools and colleges. $1.10.

=Newell's Inorganic Chemistry for Colleges.= $2.00.

=Orndorff's Laboratory Manual in Organic Chemistry.= Boards. 40 cents.

=Palmer's Questions and Problems in Chemistry.= 20 cents.

=Pepoon, Mitchell and Maxwell's Plant Life.= A laboratory guide. 50 cents.

=Remsen's Organic Chemistry.= Revised edition. $1.25.

=Roberts's Stereo-Chemistry.= Its development and present aspects, $3.00.

=Sanford's Experimental Psychology.= Part I. Sensation and perception. $1.50.

=Shaler's First Book in Geology.= Cloth, 60 cents. Boards. 45 cents.

=Shepard's Inorganic Chemistry.= Descriptive and qualitative. $1.15.

=Shepard's Briefer Course in Chemistry=, with chapter on Organic Chemistry. 80 cts.

=Shepard's Laboratory Note-Book.= Boards. 35 cents.

=Spalding's Botany.= Practical exercises in the study of plants. 80 cents.

=Stevens's Introduction to Botany.= Illustrated, $1.25. Key and Flora, 40 cents. Botany, with Key and Flora. $1.50.

=Venable's Short History of Chemistry.= For students and the general reader. $1.00.

=Walters's Physiology and Hygiene.= For secondary schools. $1.20.

=Weed's Farm Friends and Farm Foes.= Weeds and insects. 90 cents.

=Weed and Crossman's Laboratory Guide in Zoology.= Emphasises essentials. 60 cts.

=Whiting's Mathematical and Physical Tables.= Paper. 50 cents.

_For elementary works see our list of books 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.

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

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

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=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.

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

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

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=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.

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=Wells's Complete Trigonometry.= Plane and Spherical. 90 cts. With tables, $1.08. PLANE, bound separately, 75 cts.

=Wells's New Six-Place Logarithmic Tables.= 60 cts.

=Wells's Four-Place Tables.= 25 cts.

=Wright's Exercises in Concrete Geometry.= 35 cts.

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Drawing and Manual Training.

=Thompson's New Short Course in Drawing.= A practical, well-balanced system, based on correct principles. Can be taught by the ordinary teacher and learned by the ordinary pupil. Books I-IV, 6 × 9 inches, per dozen, $1.20. Books V-VIII, 9 × 12 inches, per dozen, $1.75. Manual to Books I-IV, 40 cts. Manual to Books V-VIII, 40 cts. Two-Book Course: Book A, per dozen, $1.20; Book B, per dozen, $1.75; Manual, 40 cts.

=Thompson's Æsthetic Series of Drawing.= This series includes the study of Historical Ornament and Decorative Design. Book I treats of Egyptian art; Book II, Greek; Book III, Roman; Book IV, Byzantine;