The International Scientific Series — continued. 



XVI. Tlie LIFE and GBO"WTH of LANGUAGE. By William 



DwiQHT Whitney. Sixth Edition. 



XVII. MONEY and the MECHANISM of EXCHANGE. By 



W. Stanley Jkvons, M.A., F.R.S. Eighth Edition. 



XVin. The NATUBE of LIGHT, with a General Account of 

 PHYSICAL OPTICS. By Dr. Eugene Lommel. With 188 Illus- 

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



XIX. ANIMAL PARASITES and MESSMATES. By Monsieur 

 Van Benkden. With 83 Illustrations. Third Edition. 



XX. FERMENTATION. By Profe&sor Schutzenbebger. With 



28 Illustrations. Fourth Edition. 



XXI. The FIVE SENSES of MAN. By Professor Bernstein. 

 With 91 Illustrations. Fifth Edition. 



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



By Professor Pietro Blaserna. With numerous Illustrations. Third 

 Edition. 



XXIII. STUDIES in SPECTRUM ANALYSIS. By J. Norman 



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

 numerous Engravings on Wood. Fourth Edition. 65. Sd. 



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



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

 Edition. 



XXV. EDUCATION as a SCIENCE. By Alexander Bain, LL.D. 



Seventh Edition. 



XXVI. The HUMAN SPECIES. By Professor A. de Quatbefages, 



Membre de I'lnstitut. Fourth Edition. 



XXVII. MODERN CHROMATICS. With Application to Art and 

 Industry. By Ogden N. Rood. Second Edition. With 130 original Illus- 

 trations. 



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

 By T. H. Huxley, F.R.S. Fifth Edition. With 82 Illustrations. 



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



Bastlan, M.D. Third Edition. With 184 Illustrations. 



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

 lated by E. Clkminshaw, F.C.S. Fifth Edition. 



XXXI. The NATURAL CONDITIONS of EXISTENCE as 

 they aflfect Animal Life. By Karl Semper. Third Edition. 

 With 2 Maps and 106 Woodcuts. 



London: KEGAN PAUL, TRENCH, & CO., 1 Paternoster Square. 



