QUALITATIVE ANALYSIS and LABORATORY PRACTICE. By T. E. Thorpe, Ph.D. F.R.S. Professor of Chemistry in the Andersonian University, Glasgow, and M. M. PATTISON MUIR, M.A. and F.R.S.E. With Plate of Spectra and 57 Woodcuts. Price 3s. 6d.

INTRODUCTION to the STUDY of CHEMICAL PHILOSOPHY; the PRINCIPLES of THEORETICAL and SYSTEMATICAL CHEMISTRY. By William A. Tilden, D.Sc. London, F.R.S. With 5 Woodcuts. With or without Answers to Problems, 4s. 6d.

ELEMENTS of MACHINE DESIGN; an Introduction to the Principles which determine the Arrangement and Proportion of the Parts of Machines, and a Collection of Rules for Machine Design. By W. Cawthorne Unwin, B.Sc. M.I.C.E. With 325 Woodcuts. Price 6s.

PLANE and SOLID GEOMETRY. By H. W. Watson, M.A. formerly Fellow of Trinity College, Cambridge. Price 3s. 6d.


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GANOT'S NATURAL PHILOSOPHY for GENERAL READERS and YOUNG PERSONS: a Course of Physics divested of Mathematical Formulæ, expressed in the language of daily life. Translated and edited, from Ganot's Cours Élémentaire de Physique, by E. Atkinson, Ph.D. F.C.S. Sixth Edition, with 34 pages of new matter, 2 Plates, 518 Woodcuts, and an Appendix of Questions. Crown 8vo. 7s. 6d.

GANOT'S ELEMENTARY TREATISE on PHYSICS, Experimental and Applied, for the use of Colleges and Schools. Translated and edited, from Ganot's Éléments de Physique, by E. Atkinson, Ph.D. F.C.S. Twelfth Edition, revised and enlarged; with 5 Coloured Plates and 923 Woodcuts. Cr. 8vo. 15s.