Mayer. — SOUND : a Series of Simple, Entertaining, and Inex- pensive Experiments in the Phenomena of Sound, for the Use of Students of every age. By A. M. Mayer, Professor of Physics in the Stevens Institute of Technology, &c. With numerous Illustrations. Crown Svo. 2s. 6d. {Nature Series.) Mayer and Barnard.— LIGHT: a Series of Simple, Entertain- ing, and Inexpensive Experiments in the Phenomena of Light, for the Use of Students of every age. By A. M. Mayer and C. Barnard. With numerous Illustrations. Crown Svo. 2s. 6J. {Nature Series.) Newton. — I'RINCIPIA. Edited by Professor Sir W. Thomson and Professor Blackeurne. 4to, cloth. 3IJ. 6</. THE FIRST THREE SECTIONS OF NEWTON'S PRIN- CIPIA. With Notes and Illustrations. Also a Collection of Problems, principally intended as Examples of Newton's Methods. By Percival Frost, M.A. Third Edition, Svo. 12s. Parkinson. — a TREATISE ON OPTICS, By S. Parkinson, D.U., F.R.S., Tutor and Prrelector of St. John's College, Cam- bridge. Fourth Edition, revised and enlarged. Crown Svo. 10s. 6./. Perry. — STEAM, AN elementary TREATISE. By John Perry, C.E., Whitv,-orth Scholar, Fellow of the Chemic.rl Society, Professar of Mechanical Engineering and Applied Mech- anics at the Technical College, Plnsbury. With numerous Wood- cuts and Numerical Examples and Exercises. l8mo. 4^. 6J. Rayleigh. — the THEORY OF SOUND. ByLoRDR.YLEiGH, M.A,, F.R.S., formerly Fellow of Trinity College, Cambridge, Svo. Vol. I. I2.f. 6fl'. Vol. II. I2J. 6^/. [Vol. in. in the press. Reuleaux. — the kinematics of machinery. Out- hnes of a Theory of Machines. By Professor F. Reuleaux. Translated and Edited by Professor A, B. W. Kennedy, F.R.S., C,E, With 450 Illustrations, Medium Svo. 2is. Roscoe and Schuster,— SPECTRUM ANALYSIS. Lectures delivered in 1S6S before the Society of Apothecaries of London. By Sir Henry E. Roscoe, LL.D., F.R.S., formerly Professor of Chemistry in the Owens College, Victoria University, Manchester. Fourth Edition, revised and considerably enlarged by the Author and by Arthur Schuster, F.R.S., Ph.D., Professor of Applied Mathematics in the Owens College, Mctoria University. With Ap- pendices, numerous Illustrations, and Plates. Medium Svo. 2IJ-. Sanderson.— HYDROSTATICS FOR BEGINNERS. By F. W, Sanderson, M.A., late Fellow of the University of Durham, and Scholar of Christ's College, Cambridge ; Assistant Master in Dulwich College. Globe Svo. [/« the press. Shann, — AN ELEMENTARY TREATISE ON HEAT, IN RELATION TO STEAM AND THE STEAM-ENGINE. By G. Shann, M.A. With Illustrations. Crown Svo. ^s. 6d. Spottiswoode.— POLARISATION OF LIGHT. By the late W. SroTTiswooDE, F.R.S. With many Illustr.itions. New Edition. Ciowu Svo, 3>-. GJ. {Nu'ure Series.)
