Keg an Paul, Trench, Triibner, & Co., Ltd. 



XVI. The LIFE and GROWTH of LANGUAGE. By WILLIAM 



DWIOHT WHITNEY. Seventh Edition. 



XVII. MONEY and the MECHANISM of EXCHANGE. By 



W. STANLEY JKVONS, M.A., F.R.S. Twenty-second Edition. 



XVIII. The NATURE of LIGHT, with a General Account of 

 PHYSICAL OPTICS. By Dr. BUGKNK LOMMEL. With 188 Illus- 

 trations and a Table of Spectra in Chromo-lithography. Seventh Edition. 



XIX. ANIMAL PARASITES and MESSMATES. By Monsieur 

 VAN BKNEDKN. With 83 Illustrations. Fourth Edition. 



XX. FERMENTATION. By Professor SCHUTZKNBKRGEB. With 

 28 Illustrations. Fifth Edition. 



XXI. The FIVE SENSES of MAN. By Professor BERNSTEI*. 

 With 91 Illustrations. Seventh Edition. 



XXII. The THEORY of SOUND in its RELATION to MUSIC. 



By Professor PIKTHO BLASEKNA. With numerous Illustrations. Seventh 

 Edition. 



XXIII. STUDIES in SPECTRUM ANALYSIS. By J. NORMAN 



LOCKTER, F.R.S. With Six Photographic Illustrations of Spectra, and 

 numerous Engravings on Wood. Sixth Edition. <>*. 6<J. 



XXIV. A HISTORY of the GROWTH of the STEAM ENGINE. 



By Professor R. H. THUKSTON. With numerous Illustrations. Fifth 

 Edition. 



XXV. EDUCATION as a SCIENCE. By ALBXANDKB BAIN, LL.D. 



Tenth Edition. 



XXVI. The HUMAN SPECIES. By Professor A. UE QUATREFAGES, 

 Membre de 1'Institut. Sixth Edition. 



XXVII. MODERN CHROMATICS. With Application to Art and 

 Industry. By OGUKN N. ROOD. Fouith Edition. With 130 original 

 Illustrations. 



XXVIII. The CRAYFISH : an Introduction to the Study of Zoology. 

 By T. H. HUXLKY, F.R.S. Seventh Edition. With 82 Illustrations. 



XXIX. The BRAIN as an ORGAN of MIND. By H. CHARLTON 

 BASTIAN, M.D. Fifth Edition. With 184 Illustrations. 



XXX. The ATOMIC THEORY. By Professor A. WURTZ. Trans- 

 lated by E. CLBMINSHAW, F.C.S, Seventh Edition. 



XXXI. The NATURAL CONDITIONS of EXISTENCE as 

 they affect Animal Life. By KARL SEMPER. Fifth Edition. 

 With 2 Maps and 106 Woodcuts. 



XXXII. GENERAL PHYSIOLOGYof MUSCLES and NERVES. 



By Prof. J. ROSENTHAL. Fourth Edition. With 75 Illustrations. 



XXXIII. SIGHT: an Exposition of the Principles of Monocular and 



Binocular Vision. By JOSEPH LE OONTE, LL.D. Third Edition. With 

 132 Illustrations. 



XXXIV. ILLUSIONS: a Psychological Study. By JAMES SULLY. 

 Fourth Edition. 



