Paul, Trench, Triilncr & Co.'s Publications, 49 



XV. The Chemistry of Light and Photography. By Dr. 



Hermann Vogcl. With loo Illustrations. Fifth Edition. $s. 



XVI. The Life and Growth of Language. By Professor William 



Dwight Whitney. Fifth Edition. 5*. 



XVII. Money and the Mechanism of Exchange. By W. 



Stanley Jevons, M. A., F.R.S. Eighth Edition. 5^. 



XVIII. The Nature of Light. With a General Account of Physical 

 Optics. By Dr. Eugene Lommel. With iSS Illustrations and a 

 Table of Spectra in Chromo-lithography. Fifth Edition. 5-r. 



XIX. Animal Parasites and Messmates. By P. J. Van Beneden, 



With 83 Illustrations. Third Edition. 5*. 



XX. On Fermentation. By Professor Schiitzenberger. With 2$ 



Illustrations. Fourth Edition. $s. 



XXI. The Five Senses of Man. By Professor Bernstein. With 



91 Illustrations. Fifth Edition. 5-y. 



XXII. The Theory of Sound in its Relation to Music. By 



Professor Pietro Blaserna. With numerous Illustrations. Third 

 Edition. 5*. 



XXIII. Studies in Spectrum Analysis. By J. Norman Lockyer, 

 F.R.S. With 6 Photographic Illustrations of Spectra, and 

 numerous engravings on Wood. Fourth Edition. 6s. 6d. 



XXIV. A History of the Growth of the Steam Engine. By 



Professor R. H. Thurston. With numerous Illustrations. Fourth 

 Edition. 5^. 



XXV. Education as a Science. By Alexander Bain, LL.D. Seventh 



Edition. 5^. 



XXVI. The Human Species. By Professor A. de Ouatrefages. Fifth 



Edition, fj. 



XXVII. Modern Chromatics. With Applications to Art and In- 

 dustry. By Ogden N. Rood. With 130 original Illustrations. 

 Second Edition. 5-r. 



XXVIII. The Crayfish : an Introduction to the Study of Zoology. By 

 Professor T. H. Huxley. With 82 Illustrations. Fifth Edition, 5*. 



XXIX. The Brain as an Organ of Mind. By H. Charlton Bastian, 

 M.D. With numerous Illustrations. Third Edition. $s. 



XXX. The Atomic Theory. By Professor Wurtz. Translated by E. 



Cleminshaw, F.C.S. Fifth Edition. $s. 



XXXI. The Natural Conditions of Existence as they affect 

 Animal Life. By Karl Semper. With 2 Maps and 106 

 Woodcuts. Third Edition. 5^. 



XXXII. General Physiology of Muscles and Nerves. By Pro. 

 fessor J. Iloscnthal. Third Edition. With 75 Illustrations. 5*. 



