The International Scientific Series. Each Book complete in One Vol. Crown 8vo. cloth, 5s., unless otherwise described. Edited by F. L E G G E . KEGAN PAUL, TRENCH, TRUBNER, . AND CO, LTD. . DRY DEN HOUSE, GERRARD STREET, W. d J J THE INTERNATIONAL SCIENTIFIC SERIES. Edited by F. LEGGE. Each Book Complete in One Volume. Crown 8vo. cloth, 58. unless otherwise described. I. FORMS of WATER in Clouds and Rivers, Ice and Glaciers, By J. TYNDAIJ,, LL. D., F. R. S. With 25 Illustrations. Twelfth Edition. 1 PHYSICS and POLITICS or, Thoughts on the Application of the Principles of Natural Selection and Inheritance to Political Society. By WALmn BAGEHOT. Tenth Edition. 111. FOODS. By EDWAR S D M ITH, M . D., LL. B., F. R. S. With 156 Illustrations. Tenth Edition. - IV. MIND and BODY the Theories of their Relation. By AIJDUNDER BmT, LL. D. With Four Illustrations. Ninth Edition. V. The STUDY of SOCIOLOGY. By HEEBERT SPENCER. Eighteenth Edition. VI. The CONSERVATION of ENEBGY. By BALFOUR S TEWART, M. A., LL. D., F. R. S. With 14 Illustrations. Eighth Edition. I ANIMAL LOCOMOTION or, Walking, Swimming, and Flying. By J. B. Pmctmw, M, D,, F. R. S., c. With 130 Illustrations. Fourth Edition. VIII, RESPONSIBILITY in MENTAL DISEASE. By HENRY UUDS M L . D E . Y Fif , th Edition. IX. The NEW CHEMISTRY. 13y Professor J. P. Coom, of the Harvard University, With 31 Illustrations. Eleventh Edition. X. The SCIENCE of LAW. By Professor SH CLDOAMNO S. Eighth Edition. XI. ANIMAL MECHANISM a Treatise on Terrestrial and Akirial Locomotion. By Professor E. J. MAREY. With 117 Illustrations. Fourth Edition. XII. The DOCTRINE of DESCENT and DARWINISM. By Professor OSCARS CHMIDT S trasburg University. With 26 Illustrations. Eighth Edition, XIII. The HISTORY of the CONFLICT between RELIGION and SCIENCE. Br J. W. DRAPER, M. D., LL. D, Twenty-secon Edition, XIV, FUNGI their Nature, Influences, uses, c. By M. C, Coom, A , LLD. Edited by the Rev. M. J. BER-Y, M. A., F. L. S. Witb Illustrations, Fifth Edition. XV. The CHEMISTRY of LIGHT and PHOTOGRAPHY, By Dr. HERUNN VOQEL. With 100 Illustrations. Sixth Edition. 2 Kegan Paul, Trench, Trubner, LI Co., Ltd. XVI. The LIFE and GROWTH of LANGUAGE, By WILLJAM DWIQHT W H NEY S . i xth Edition. XVII. MONEY and the MECHANISM of EXCHANGE. By W. STANLEY JE VON M B . A. , , F. R. S. Eleventh Edition. XVIII. The NATURE of LIGHT, with a General Account of PH. YSICAL OPTICS. By Dr. EU EN L E O MMEL. W ith 188 Illuctrations and a Table of Spectra in Chromo-lithography, Sixth Edition. XIX. ANIMAL PARASITES and MESSMATES. By Monsieur VAN BENEDEN. With 83 Illustrations. Fourth Edition. XX. FERMENTATION. By Professor SCHUTZENBEBG W E it B h . 28 illustrations. Fourth Edition. XXI. The FIVE SENSES of MAN. By Professor BERN STEIN With 91 Illustrations. Seventh Edition. XXII. The THEORY of SOUND in its RELATION to MUSIC. By Professor PIETRO BLASERNA. With numerous Illustrations. Sixth Edition. XXIII. STUDIES in SPECTRUM ANALYSIS. By J. NORMAN LOCKYER, F. R. S. With Six Photographic Illustrations of Spectra, and numerous Engravings on Wood. Fifth Edition. 6s. 6d. XXIV. A HISTORY of the GROWTH of the STEAM ENGINE. By Professor R. H. THURBTONW. ith nnmerous Illustrations, Fifth Edition. XXV. EDUCATION as a SCIENCE. By ALEXANDER BAIN L , L. D. Ninth Edition. I XXVI, The HUMAN SPECIES. By Professor A. DE QUATREFAGES, Membre de 1 Institut. Fifth Edition. XXVII. MODERN CHROMATICS. With Application to Art and Industry. By OQDEN N. ROOD. Third Edition. With 130 original Ulus trations. XXVIII. The CRAYFISH an Introduction to the Study of Zoology, By T. H. HUXLEYF,. R. S. Sixth Edition. With 82 Illustrations. XXIX. The BRAIN as an ORGAN of MIND. By H. CHARLTON B u m , M. D. Fourth Edition. With 184 Illustrations. XXX, The ATOMIC THEORY, By Professor A. WURTZ. Trans lated by E. CLEMINSHAWF. C, . S. Seventh Edition. XXX... --This text refers to an alternate Paperback edition.