“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. “A very readable account of the phenomena of volcanoes and earthquakes.”--_Nature._ XX. PUBLIC HEALTH. By Dr. J. F. J. SYKES. With numerous Illustrations. “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. “The present volume is the best on the subject for general use that we have seen.”--_Daily Telegraph._ IMPORTANT ADDITION TO THE SERIES. XXII. _THE GERM-PLASM: A THEORY OF HEREDITY. By August Weismann, Professor in the University of Freiburg-in-Breisgau. With 24 Illustrations._ “There has been no work published since Darwin’s own books which has so thoroughly handled the matter treated by him, or has done so much to place in order and clearness the immense complexity of the factors of heredity, or, lastly, has brought to light so many new facts and considerations bearing on the subject.”--_British Medical Journal._ XXIII. INDUSTRIES OF ANIMALS. By F. HOUSSAY. With numerous Illustrations. “His accuracy is undoubted, yet his facts out-marvel all romance. These facts are here made use of as materials wherewith to form the mighty fabric of evolution.”--_Manchester Guardian._ XXIV. MAN AND WOMAN. By HAVELOCK ELLIS. Illustrated. “Altogether we must congratulate Mr. Ellis upon having produced a book which, apart from its high scientific claims, will, by its straightforward simplicity upon points of delicacy, appeal strongly to all those readers outside purely scientific circles who may be curious in these matters.”--_Pall Mall Gazette._ “This striking and important volume ... should place Mr. Havelock Ellis in the front rank of scientific thinkers of the time.”--_Westminster Review._ XXV. THE EVOLUTION OF MODERN CAPITALISM. By JOHN A. HOBSON, M.A. “Every page affords evidence of wide and minute study, a weighing of facts as conscientious as it is acute, a keen sense of the importance of certain points as to which economists of all schools have hitherto been confused and careless, and an impartiality generally so great as to give no indication of his [Mr. Hobson’s] personal sympathies.”--_Pall Mall Gazette._