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.