"Among the distinguished French students of sociology, Professor Letourneau has long stood in the first rank. He approaches the great study of man free from bias and shy of generalisations. To collect, scrutinise, and appraise facts is his chief business. In the volume before us he shows these qualities in an admirable degree."--_Science_. XIV. BACTERIA AND THEIR PRODUCTS. By Dr. G. SIMS WOODHEAD. Illustrated. Third Edition. 3s. 6d. "An excellent summary of the present state of knowledge of the subject."--_Lancet_. XV. EDUCATION AND HEREDITY. By J. M. GUYAU. 3s. 6d. "It is at once a treatise on sociology, ethics, and pedagogics. It is doubtful whether among all the ardent evolutionists who have had their say on the moral and the educational question any one has carried forward the new doctrine so boldly to its extreme logical consequence."--Professor SULLY in _Mind_. XVI. THE MAN OF GENIUS. By Prof. LOMBROSO. Illustrated. 3s. 6d. "By far the most comprehensive and fascinating collection of facts and generalisations concerning genius which has yet been brought together."--_Journal of Mental Science_. XVII. THE HISTORY OF THE EUROPEAN FAUNA. By R. F. SCHARFF, B.Sc., Ph.D., F.Z.S. 6s. XVIII. PROPERTY: ITS ORIGIN AND DEVELOPMENT. By CH. LETOURNEAU, General Secretary to the Anthropological Society, Paris, and Professor in the School of Anthropology, Paris. 3s. 6d. "M. Letourneau has read a great deal, and he seems to us to have selected and interpreted his facts with considerable judgment and learning."--_Westminster Review_. XIX. VOLCANOES, PAST AND PRESENT. By Prof. EDWARD HULL, LL.D., F.R.S. 3s. 6d. "A very readable account of the phenomena of volcanoes and earthquakes."--_Nature_. XX. PUBLIC HEALTH. By Dr. J. F. J. SYKES. With numerous Illustrations. 3s. 6d. "Not by any means a mere compilation or a dry record of details and statistics, but it takes up essential points in evolution, environment, prophylaxis, and sanitation bearing upon the preservation of public health."--_Lancet_. XXI. MODERN METEOROLOGY. An Account of the Growth and Present Condition of some Branches of Meteorological Science. By FRANK WALDO, Ph.D., Member of the German and Austrian Meteorological Societies, etc.; late Junior Professor, Signal Service, U.S.A. With 112 Illustrations. 3s. 6d. "The present volume is the best on the subject for general use that we have seen."--_Daily Telegraph_ (London). XXII. THE GERM-PLASM: A THEORY OF HEREDITY. By AUGUST WEISMANN, Professor in the University of Freiburg-in-Breisgau. With 24 Illustrations. 6s.