PHYSICAL SCIENCE. 17 



"the beau-ideal of a scientific text-book, clear, accurate, and 

 thorough. " 



Taylor. — SOUND AND MUSIC : A Non-Mathematical Trea- 

 tise on the Physical Constitution of Musical Sounds and Harmony, 

 including the Chief Acoustical Discoveries of Professor Helm- 

 holtz. By Sedley Taylor, M.A., late Fellow of Trinity Col- 

 ledge, Cambridge. Large crown 8vo. Ss. 6d. 

 " In no previous scientific treatise do we remember so exhaustive and 



so ricMy illustrated a description of forms of vibration and of 



wave-motion in fluids P— Musical Standard. 



Thomson. — THE DEPTHS OF THE SEA : An Account of the 

 General Results of the Dredging Cruises of H.M. SS. " Porcupine " 

 and "Lightning" during the Summers of 186S-69 and 70, under 

 the scientific direction of Dr. Carpenter, F.R.S., J. Gwyn Jeffreys, 

 F.R.S., and Dr. Wyville Thomson, F.R.S. By Dr. Wyville 

 Thomson, Director of the Scientific Staff of the "Challenger" 

 Expedition. With nearly 100 Illustrations and 8 coloured Maps 

 and Plans. Second Edition. Royal 8vo. cloth, gilt. 31s. 6d. 

 It was the important and interesting results recorded in this volume 

 that induced the Government to send out the great Expedition now 

 launched under the scientific guidance of Dr. Wyville Thomson. 

 The Athenaeum says : " Professor Thomson's book is full of" in- 

 teresting matter, and is written by a master of the art 0/ popular 

 exposition. It is excellently illustrated, both coloured maps and 

 woodcuts possessing high merit. Those who have already become 

 interested in dredging operations will of course make a point oj 

 reading this work ; those who wish to be pleasantly introduced to the 

 subject, and rightly to appreciate the news which arrives from time 

 to time from the ' Challenger ■,' should not fail to seek instruction 

 from Professor Thomson.'''' 



Thornton. — OLD-FASHIONED ETHICS, AND COMMON- 

 SENSE METAPHYSICS, with some of their Applications. By 

 William Thomas Thornton, Author of "A Treatise on Labour." 

 8vo. 1 or. 6d. 



The present volume deals with problems wliich are agitating the 

 minds of all thoughtful men. The following are the Contents : — 

 /. Ante-Utilitarianism. II. History's Scientific Pretensions. III. 

 David Hume as a Metaphysician. IV. Huxleyism. V. Recent 

 P ase of Scientific Atheism. VI. Limits of Demonstrable Theism. 



Thudichum and Dupre. — A TREATISE ON THE 

 ORIGIN, NATURE, AND VARIETIES OF WINE. 

 Being a Complete Manual of Viticulture and CEnology. By J. L. 

 W. Thudichum, M.D., and August Dupre, Ph.D., Lecturer on 

 Chemistry at Westminster Hospital. Medium Svo. cloth gilt. 25J. 

 ' 'A treatise almost unique for its usefulness either to the wiuc-grazuer, 

 the vendor, or the consumer of wine. The analyses of -wine are 

 the most complete we have yet seen, exhibiting at a glance the 



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