*** _Other Volumes will be announced in due course._ WORKS BY I. TODHUNTER, M.A., F.R.S., Fellow and Principal Mathematical Lecturer of St. John's College, Cambridge. A Treatise on Algebra. For the Use of Colleges and Schools. With numerous Examples. Third Edition, revised. Crown 8vo. cloth, 7s. 6d. An Elementary Treatise on the Theory of Equations, with a Collection of Examples. Crown 8vo. cloth, 7s. 6d. A Treatise on Plane Trigonometry. For the use of Colleges and Schools. With numerous Examples. Second edition, revised. Crown 8vo. cloth, 5s. A Treatise on Spherical Trigonometry. For the use of Colleges and Schools. With numerous Examples. Crown 8vo. cloth, 4s. 6d. * * * * * * * * * A Treatise on Plane Co-ordinate Geometry, as applied to the Straight Line and the Conic Sections. With numerous Examples. Third and cheaper Edition. Crown 8vo. cloth, 7s. 6d. A Treatise on the Differential Calculus. With numerous Examples. Third Edition, revised. Crown 8vo. cloth, 10s. 6d. A Treatise on the Integral Calculus and its Applications. With numerous Examples. Second Edition, revised and enlarged. Crown 8vo. cloth, 10s. 6d. A Treatise on Analytical Statics. With numerous Examples. Second Edition, revised and enlarged. Crown 8vo. cloth, 10s. 6d. Examples of Analytical Geometry of Three Dimensions. Crown 8vo. cloth, 4s. A History of the Progress of the Calculus of Variations during the Nineteenth Century. 8vo. cloth, 12s. Euclid for Colleges and Schools. 18mo. 3s. 6d. WORKS BY BARNARD SMITH, M.A., Fellow of St. Peter's College, Cambridge. Arithmetic and Algebra, in their Principles and Application. With numerous Examples, systematically arranged. Eighth Edition, 696 pp. (1861). Crown 8vo. strongly bound in cloth, 10s. 6d. Arithmetic. For the use of Schools. New Edition (1862), 348 pp. Crown 8vo. strongly bound in cloth, 4s. 6d. Answers to all the Questions. Key to the above, containing Solutions to all the Questions in the latest Edition. Crown 8vo. 392 pp. Second Edition (1860). 8s. 6d. Exercises in Arithmetic. 104 pp. Crown 8vo. (1860), 2s. Or with Answers, 2s. 6d. Also sold separately in 2 Parts, price 1s. each. Answers, 6d. Plane and Spherical Trigonometry. With the Construction and Use of Tables of Logarithms. By J. C. SNOWBALL, M.A. Ninth Edition, 240 pp. (1856). Crown 8vo. 7s. 6d. Plane Trigonometry. With a numerous Collection of Examples. By R. D. BEASLEY, M.A. 106 pp. (1868). Crown 8vo. 3s. 6d. Elementary Treatise on Mechanics. With a Collection of Examples. By S. PARKINSON, B.D. Second Edition, 345 pp. (1860). Crown 8vo. 9s. 6d. A Treatise on Optics. By S. PARKINSON, B.D. 304 pp. (1859). Crown 8vo. 10s. 6d. Elementary Hydrostatics. With numerous Examples and Solutions. By J. B. PHEAR, M.A. Second Edition. 156 pp. (1857). Crown 8vo. 5s. 6d.