XXVII. MODERN CHROMATICS. With Application to Art and Industry. By OGDEN N. ROOD. Third Edition. With 130 original Illustrations. XXVIII. The CRAYFISH: an Introduction to the Study of Zoology. By T. H. HUXLEY, F.R.S. Sixth Edition. With 82 Illustrations. XXIX. The Brain As an Organ of Mind. By H. CHARLTON BASTIAN, M.D. Fourth Edition. With 184 Illustrations. XXX. The ATOMIC THEORY. By Professor A. WURTZ. Translated by E. CLEMINSHAW, 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 PHYSIOLOGY of 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 CONTE, LL.D. Third Edition. With 132 Illustrations. XXXIV. ILLUSIONS: a Psychological Study. By JAMES SULLY. Fourth Edition. XXXV. VOLCANOES: what they are and what they teach. By JOHN W. JUDD, F.R.S. Fifth Edition. With 96 Illustrations. XXXVI. SUICIDE: an Essay on Comparative Moral Statistics. By Professor H. MORSELLI. Third Edition. XXXVII. The BRAIN and its FUNCTIONS. By J. LUYS, Physician to the Hospice de la Salpetriere. With numerous Illustrations. Third Edition. XXXVIII. MYTH and SCIENCE: an Essay. By TITO VIGNOLI. Fourth Edition. XXXIX. The SUN. By C. A. YOUNG, Ph.D., LL.D. Fifth Edition. With numerous Illustrations. XL. ANTS, BEES, and WASPS. A Record of Observations on the Habits of the Social Hymenoptera. By Lord AVEBURY. Fourteenth Edition. With 5 Chromo-lithographic Plates. XLI. ANIMAL INTELLIGENCE. By GEORGE J. ROMANES, LL.D., F.R.S. Sixth Edition. XLII. The CONCEPTS and THEORIES of MODERN PHYSICS. By J. B. STALLO. Third Edition. XLIII. DISEASES of MEMORY. An Essay in the Positive Psychology. By TH. RIBOT. Fourth Edition. XLIV. MAN BEFORE METALS. By N. JOLY, Correspondent del'Institut de France. Fifth Edition. With 148 Illustrations. XLV. The SCIENCE of POLITICS. By Prof. SHELDON AMOS. Third Edition. XLVI. ELEMENTARY METEOROLOGY. By ROBERT H. SCOTT. With 11 Plates and 40 Figures in Text. Seventh Edition. XLVII. The ORGANS of SPEECH. By GEORG HERMANN VON MEYER. With 47 Illustrations. XLVIII. FALLACIES: a View of Logic from the Practical Side. By ALFRED SIDGWICK. Second Edition. XLIX. The ORIGIN of CULTIVATED PLANTS. By ALPHONSE DE CANDOLLE. Second Edition. L. JELLY FISH, STAR FISH, and SEA URCHINS. Being a Research on Primitive Nervous Systems. By G. J. ROMANES, LL.D., F.R.S. Second Edition. LI. The COMMON SENSE of the EXACT SCIENCES. By the late WILLIAM KINGDON CLIFFORD. Third Edition. With 100 Figures.