THIS Manual of Physics took its rise from a desire to relieve the subject of the foreign element of unreality, and to give a modern and practical course of Natural Philosophy in a compendious form. The illustrations are almost all new, and the Editor, owing to a temporary lull in the demand for the beautiful art of woodengraving, was able to secure the services of one of its best exponents, Mr. Octave L. Lacour, who has executed 278 blocks for the work. It was the original intention of the editor to secure the revision of the whole book by one scientific man of eminence; but, owing to the kindness of friends, he was led to the preferable plan of securing the advice in each part of one who had made the subject a special study. For this immense advantage he is indebted to the extreme kindness of Lord Kelvin, Lord Rayleigh, Professor J. A. Ewing, and Captain Wilson Barker. A complete Index renders the usual Table of Contents and List of Illustrations unnecessary. A CAMBRIDGE TUTOR SAYS:- "It is the sort of book that candidates for the Mathematical Tripos ought to read, that they may have the correct physical ideas before venturing on mathematical applications. That is a difficulty one finds in one's lectures on Electricity and Magnetism. The pupils do not know the facts, and so fail to understand the Mathematics." Guardian. -"A treatise which deals on a uniform plan with the whole range of physics is a great convenience both to teacher and student. . . . The present careful and elaborate compilation will, we expect, find favour with many schoolmasters. . . . The authors are thoroughly versed in the art of adapting their treatment to the capabilities of schoolboys." Nature." In this book an attempt is made to give a modern and practical course of natural philosophy in a compendious form, and it may be stated at once that the effort is a most successful one. The treatment of the varions subjects is most lucid and thorough, and is evidently based on an intimate acquaintance with the requirements of students. Great pains have been taken to avoid looseness of statement; and the fact that some of the sections have had the advantage of the criticisms and suggestions of Lord Kelvin, Lord Rayleigh, and others, makes it a trustworthy book of reference. Where everything else is so well done, it is difficult to select points for special mention, but it mae be remarked that examples drawn from naval sources form a notably and valuable feature, and graphical methods of representing experimental results are largely utilised and encouraged. Academy.-"The Elementary Course of Physics is again a work of quite a different kind. Hitherto the reader requiring a general account of the present state of physical science has gone to translations of the well-known books by Ganot and Deschanel, which have for many years had a wide popularity in this country. The volume now under our notice is an English attempt to meet such a student's requirements. The various parts are treated by different authors, the whole being edited by Mr. Aldous. Thus, while the sections on mechanics, hydrostatics, and heat are written by the editor, wave-motion, sound, and light are from the pen of Mr. W. D. Eggar, and magnetism and electricity from that of Professor Barrell. A striking feature of the book is the profusion of clear, artistic illustrations, which will do much to lighten the beginner's task. The fact that the various chapters have been examined and criticised by Lord Kelvin, Lord Rayleigh, and others should be guarantee enough that we have here a trustworthy introduction to an extensive subject." Now Ready. Globe 8vo. Price 2s. 6d. ELEMENTARY LESSONS IN HEAT, LIGHT, AND SOUND BY D. E. JONES, B.Sc. (LOND.) INSPECTOR OF SCIENCE SCHOOLS UNDER THE SCIENCE AND ART DEPARTMENT ADAPTED TO THE ELEMENTARY STAGE OF THE SOUTH KENSINGTON SYLLABUS London MACMILLAN AND CO., LIMITED NEW YORK: THE MACMILLAN COMPANY Glasgow Herald." Should be very popular among young students, and the practical study of heat, light, and sound, with its aid should serve to create enthusiasm for the subject. . . . The book is well and simply written." ... Scottish Leader.-" Prof. Jones is master of an admirably clear expository style; he spares no pains to make each phase of his subject intelligible, and his explanations are aided by numerous diagrams and other illustrations." Scotsman.-"It is an elementary book, but few elementary treatises convey anything like so much knowledge of their subjects, and few make the subjects so interesting to a mind coming fresh to them. The large number of illustrations contribute something to this result, but it is due mainly to the expository skill of the author, and to his interesting manner of explaining experiments." The Schoolmaster.-"May be confidently recommended for giving sound elementary knowledge of these branches of physical science. The statements are concise, the definitions clear and accurate, and the descriptions, both verbal and pictorial, are well chosen." Engineering." Well suited to serve the purpose of introducing beginners to the study of Experimental Physics: the general arrangement of the work is particularly happy, and the paragraphs are clearly written, explaining those points that do not generally seem to be grasped by students." BY THE SAME AUTHOR EXAMPLES IN PHYSICS Fcap. 8vo. Third Edition. Revised and Enlarged. 38. 6d. Containing over one thousand problems and questions, with an introduction, numerous solved examples and hints for solution answers, and a table of logarithms. 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