OXFORD MAGAZINE.--“In spite of the great improvement in text-books of elementary physics during recent years, the authors’ experience has enabled them to produce one that marks a further advance on its predecessors. The chief features of the book are the lucidity with which it is written, and the large number of excellent illustrations which serve to elucidate many points often imperfectly understood.” TEACHER.--“The candidate who is preparing for an elementary examination in any branch of Physics, and who has worked through this book and mastered its contents will have but little cause to fear the examiners’ questions. The matter is concisely stated, methodically arranged, and, needless to remark, from the standing of the authors, it is both accurate and complete within the limits stated. A large number of diagrams illustrate the text and are mostly original and new. Searching exercises are placed at the end of each chapter.” MACMILLAN AND CO., Ltd., LONDON. WORKS ON PHYSICS GENERAL AN ELEMENTARY COURSE OF PHYSICS. Edited by Rev. J. C. P. Algous, M.A. Extra Crown 8vo. 7s. 6d. Or in Three Parts. Part I., by Rev. J. C. P. Aldous. 4s. 6d. Part II., by W. D. Eggar. 2s. 6d. Part III., by F. R. Barrell. 2s. 6d. A TEXT BOOK OF THE PRINCIPLES OF PHYSICS. By Alfred Daniell, M.A., D.Sc. Third Edition. Medium 8vo. 21s. PRACTICAL LESSONS IN PHYSICAL MEASUREMENT. By Alfred Earl, M.A. Crown 8vo. 5s. PRACTICAL SCIENCE. By Hugh Gordon, M.A. Part I. Pott 8vo. 1s. AN EXERCISE BOOK OF ELEMENTARY PRACTICAL PHYSICS. By Prof. R. A. Gregory. 4to. 2s. 6d. EXERCISES IN PRACTICAL PHYSICS. By Prof. R. A. Gregory and A. T. Simmons, B.Sc. In two Vols. Globe 8vo. 2s. each. LESSONS IN ELEMENTARY PHYSICS. By Balfour Stewart, F.R.S. Fcap. 8vo. 4s. 6d. Questions. 2s. PRACTICAL PHYSICS. By D. Rintoul. Globe 8vo. 2s. 6d. THEORETICAL AND PRACTICAL MECHANICS AND PHYSICS. By A. H. Mackenzie. Crown 8vo. 1s. 6d. MACMILLAN AND CO., Ltd., LONDON.