MATHEMATICS. Boole, G., D.C.L.-continued. 13 THE CALCULUS OF FINITE DIFFERENCES. Crown 8vo. cloth. IOS. 6d. In this exposition of the Calculus of Finite Differences, particular attention has been paid to the connexion of its methods with those of the Differential Calculus-a connexion which in some instances involves far more than a merely formal analogy. The work is in some measure designed as a sequel to Professor Boole's Treatise on Differential Equations. CAMBRIDGE SENATE-HOUSE PROBLEMS AND RIDERS, WITH SOLUTIONS : : 1848-1851.-PROBLEMS. By FERRERS and JACKSON. 8vo. cloth. 15s. 6d. 1848-1851.-RIDERS. BY JAMESON. 8vo. cloth. 7s. 6d. 1854.- PROBLEMS AND RIDERS. By WALTON and By CAMPION and 1860.-PROBLEMS AND RIDERS. BY WATSON and ROUTH. Crown 8vo. cloth. 7s. 6d. 1864.-PROBLEMS AND RIDERS. By WALTON and WILKINSON. 8vo. cloth. IOS. 6d. These volumes will be found of great value to Teachers and Students, as indicating the style and range of mathematical study in the University of Cambridge. CAMBRIDGE COURSE OF ELEMENTARY NATURAL PHILOSOPHY, for the Degree of B. A. Originally compiled by This work will be found adapted to the wants, not only of University Students, but also of many others who require a short course of Mechanics 14 EDUCATIONAL BOOKS. and Hydrostatics, and especially of the candidates at our Middle Class Examinations. At the end of each chapter a series of easy questions is added for the exercise of the student. CAMBRIDGE AND DUBLIN MATHEMATICAL JOURNAL. The Complete Work, in Nine Vols. 8vo. cloth, 77. 4s. Only a few copies remain on hand. Among Contributors to this work will be found Sir W. Thomson, Stokes, Adams, Boole, Sir W. R. Hamilton, De Morgan, Cayley, Sylvester, Fellett, and other distinguished mathematicians. Candler.-HELP TO ARITHMETIC. Designed for the use of Schools. By H. 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With Notes and Illustrations. Also a collection of Problems, principally intended as Examples of Newton's Methods. By PERCIVAL FROST, M. A., late Fellow of St. John's College, Mathematical Lecturer of King's College, Cambridge. Second Edition. 8vo. cloth. IOS. 6d. be The author's principal intention is to explain difficulties which may encountered by the student on first reading the Principia, and to illustrate the advantages of a careful study of the methods employed by Newton, by showing the extent to which they may be applied in the solution of problems; he has also endeavoured to give assistance to the student who is engaged in the study of the higher branches of mathematics, by representing in a geometrical form several of the processes employed in the Differential and Integral Calculus, and in the analytical investigations of Dynamics. Frost and Wolstenholme.-A TREATISE ON SOLID GEOMETRY. By PERCIVAL FROST, M. A., and the Rev. J. WOLSTENHOLME, M. 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This book embraces all those branches of Astronomy which have, from time to time, been recommended by the Cambridge Board of Mathematical B |