"This volume is the best popular and yet scientific treatment we know of of the origin and development of land-forms, and we immediately adopted it as the best available text-book for a college course in physiography.... The book is full of life and vigor, and shows the sympathetic touch of a man deeply in love with nature."--_Science._ 5.--+Volcanoes.+ By T. G. BONNEY, F.R.S., University College, London. Fully illustrated. 8º. $2.00. "It is not only a fine piece of work from a scientific point of view, but it is uncommonly attractive to the general reader, and is likely to have a larger sale than most books of its class."--_Springfield Republican._ 6.--+Bacteria+: Especially as they are related to the economy of nature, to industrial processes, and to the public health. By GEORGE NEWMAN, M.D., F.R.S. (Edin.), D.P.H. (Camb.), etc., Demonstrator of Bacteriology in King's College, London. With 24 micro-photographs of actual organisms and over 70 other illustrations. 8º. $2.00. "Dr. Newman's discussions of bacteria and disease, of immunity, of antitoxins, and of methods of disinfection, are illuminating, and are to be commended to all seeking information on these points. Any discussion of bacteria will seem technical to the uninitiated, but all such will find in this book popular treatment and scientific accuracy happily combined."--_The Dial._ 7.--+A Book of Whales.+ By F. E. BEDDARD, M.A., F.R.S. Illustrated. 8º. $2.00. "Mr. Beddard has done well to devote a whole volume to whales. They are worthy of the biographer who has now well grouped and described these creatures. The general reader will not find the volume too technical, nor has the author failed in his attempt to produce a book that shall be acceptable to the zoölogist and the naturalist."--_N. Y. Times._ 8.--+Comparative Physiology of the Brain and Comparative Psychology.+ With special reference to the Invertebrates. By JACQUES LOEB, M.D., Professor of Physiology in the University of Chicago. Illustrated. 8º. $1.75. "No student of this most interesting phase of the problems of life can afford to remain in ignorance of the wide range of facts and the suggestive series of interpretations which Professor Loeb has brought together in this volume."--JOSEPH JASTROW, in the _Chicago Dial_. 9.--+The Stars.+ By Professor SIMON NEWCOMB, U.S.N., Nautical Almanac Office, and Johns Hopkins University. 8º. Illustrated. Net, $2.00. (By mail, $2.00.) "The work is a thoroughly scientific treatise on stars. The name of the author is sufficient guarantee of scholarly and accurate work."--_Scientific American._