2 7 Kegan Paul, Trench, & Cols Publications. XXIV. A History of the Growth of the Steam Engine. By Professor R. H. Thurston. With numerous Illustrations. Third Edition. Crown 8vo. 6s. 6d. XXV. Education as a Science. By Alexander Bain, LL.D. Fourth Edition. Crown 8vo. 51. XXVI. The Human Species. By Prof. A. De Quatrefages. Third Edition. Crown 8vo. 5/. XXVII. Modern Chromatics. With Applications to Art and Industry. By Ogden N. Rood. With 130 original Illustrations. Second Edition. Crown 8vo. 5*. XXVIII. The Crayfish : an Introduc tion to the Study of Zoology. By Professor T. H. Huxley. With 82 Illustrations. Fourth Edition. Crown 8vo. 5r. XXIX. The Brain as an Organ of Mind. By H. Charlton Bastian, M.D. With numerous Illustrations. Third Edition. Crown 8vo. 5r. XXX. The Atomic Theory. By Prof. Wurtz. Translated by G. Clemin- shaw, F.C.S. Third Edition. Crown 8vo. 5-f. XXXI. The Naturae Conditions of Existence as they affect Animal Life. By Karl Semper. With 2 Maps and 106 Woodcuts. Third Edition. Crown 8vo. 5r. XXXII. General Physiology of Muscles and Nerves. By Prof. J. Rosenthal. Third Edition. With Illustrations. Crown 8vo. 5r. XXXIII. Sight : an Exposition of the Principles of Monocular and Binocular Vision. By Joseph Le Cojite, LL.D. Second Edition. With 132 Illustra tions. Crown 8vo. Sj. XXXIV. Illusions : a Psychological Study. By James Sully. Second Edition. Crown 8vo. 5r. XXXV. Volcanoes: what they are and what they teach. By Professor J. W. Judd, F.R. S. With 92 Illustrations on Wood. Third Edition. Crown 8vo. 5s. XXXVI. Suicide : an Essay on Com parative Moral Statistics. By Prof. H. Morselli. Second Edition. With Diagrams. Crown 8vo. 5s. XXXVII. The Brain and its Func tions. By J. Luys. Second Edition. With Illustrations. Crown 8vo. Sr. XXXVIII. Myth and Science : an Essay. By Tito Vignoli. Second Edition. Crown 8vo. Sr. XXXIX. The Sun. By Professor Young. With Illustrations. Second Edition. Crown 8vo. Sr. XL. Ants, Bees, and Wasps : a Record of Observations on the Habits of the Social Ilymenoptera. By Sir John Lubbock, Bart., M.P. WithSChromo- lithographic Illustrations. Seventh Edition. Crown 8vo 5r. XLI. Animal Intelligence. By G. J. Romanes, LL.D., F.R.S. Third Edition. Crown 8vo. Sr. XLII. The Concepts and Theories of Modern Physics. By J. B. Stallo. Third Edition. Crown 8vo. 5r. XLIII. Diseases of Memory : an Essay in the Positive Pyschology. By Prof. Th. Ribot. Second Edition. Crown 8vo. Sr. XLIV. Man before Metals. By N. Joly. Third Edition. Crown 8vo. 5r. XLV. The Science of Politics. By Prof. Sheldon Amos. Third Edit. Crown. 8vo. Sr. XLVI. Elementary Meteorology. By Robert H. Scott. Third Edition. With numerous Illustrations. Crown 8vo. Sr. XLVII. The Organs of Speech and their Application in the For mation of Articulate Sounds. By Georg Hermann von Meyer. With 47 Woodcuts. Crown 8vo. Sr. XLVIII. Fallacies : a View of Logic from the Practical Side. By Alfred Sidgwick. Crown 8vo. Sr. XLIX. Origin of Cultivated Plants. By Alphonse de Candolle. Crown 8vo. Sr. L. Jelly Fish, Star Fish, and Sea Urchins. Being a Research on Primitive Nervous Systems. By G. J. Romanes. Crown 8vo. Sr.
