12 NEW WORKS publishkd by LONGMANS axd 00. 



KEITH JOHNSTON'S GENERAL DICTIONARY of GEOGRAPHY, 



Descriptive, Physical. Statistical, and Historical ; forming a complete Gazetteer 

 of the Worid. New Edition (1S70, revised and corrected. 8vo. price 425. 



MAUNDER'S TREASURY of GEOGRAPHY, Physical, Histx)rical, 

 Descriptive, and Political. Edited by W. Hughes, F.R.G.S. Revised Edition, 

 with 7 Maps and 16 Plates. Fcp. 6*. cloth, or IO5. Qd. bound in calf. 



Natural History and Popular Science. 



TEXT-BOOKS of SCIENCE, MECHANICAL and PHYSICAL, 



adapted for the use of Artisans and of Students in Public and Science Schools. 

 Tke following Text-Books in this Series may now be had : — 

 Anderson's Strength of Materials, small 8vo. Zs, Gd. 

 Armstrong's Organic Chemistry, 3s. 6d. 

 Barry's Railway Appliances, 3s. 6d. 

 Bloxaji's Metals, 3s. 6d. 

 Goodbye's Elements of Mechanism, 35. 6d. 



Principles of Mechanics, 35. 6d. 



Griffin's Algebra and Trigonometry, 35. 6d. 

 Jenkin's Electricity and Magnetism, 35. 6d. 

 Maxwell's Theory of Heat, 35. Gd. 



Merrifield's Technical Arithmetic and Mensuration, 35. 6d. 

 Miller's Inorganic Chemistry. 35. 6d. 

 Preece & Sivewhight's Telegraphy, 35. 6d. 

 Shelley's Workshop Appliances, 35. 6d. 

 Thome's Structural and Physiological Botany, C5. 

 Thorpe's Quantitative Chemical Analysis, 45. ea. 

 Thorpe & Mum's Qualitative Analysis, 35. dd. 

 Tiijjen's Chemical Philosophy, 35. (id. 

 TJnwin's Machine Design, 3.s-. 6^/. 

 Watson's Plane and Solid Geometry, 35. Gd. 

 *^* Other Text-Books in continuation of this Series are in active preparation. 



ELEMENTARY TREATISE on PHYSICS, Experimental and Applied. 

 Translated and edited from Ganot's Aliments de Physique by E. Atkinson, 

 Ph.D. F.C.S. Seventh Edition, revised and enlarged; with 4 Coloured Plates 

 and 758 Woodcuts. Post Svo. 155. 



NATURAL PHILOSOPHY for GENERAL READERS and YOUNG 



PERSONS ; being a Course of Physics divested of Mathematical Formulfe 

 expressed in the language of daily life. Translated from Ganot's Cours de 

 Physique and by E. Atkinson, Ph.D. F.C.S. Second Edition, with 2 Plates 

 and 429 Woodcuts. Crown Svo. price 75. Gd. 



ARNOTT S ELEMENTS of PHYSICS or NATURAL PHILOSOPHY. 



Seventh Edition, eaito<l by A. B\IN, LL.D. and A. S. Tavloi:, il.D. F.R.S. 

 Crown Svo. Woodcuts, 12o. Gd. 



HELMHOLTZ'S POPULAR LECTURES on SCIENTIFIC SUBJECTS. 



Translated by E. Atkinson, Ph.D. F.C.S. Professor of Experimental Science, 

 Staff College. With an Introduction by Professor Tyndall. Svo. with nume- 

 rous Woodcuts, price 125. Gd. 



On the SENSATIONS of TONE as a Physiological Basis for the 

 Theory of ilusic. By Heiimann L. F. Helmholtc, M.D. Professor of Physics 

 in the University of Berlin, Translated, with the Author's sanction, from the 

 Third Geraian Edit'on. with Additional Notes and an Additional Appendix, by 

 Alexander J. Ellis, F.li..S. Lc. Svo, price '6Gs. 



