"The work is probably the ablest exposition of the subject which has been given to the world, and goes far to establish a new system of Mental Philosophy, upon a much broader and more substantial basis than it has heretofore stood."--_St. Louis Democrat._ "Let us add that nothing we have said, or in any limited space could say, would give an adequate conception of the valuable and curious collection of facts bearing on morbid mental conditions, the learned physiological exposition, and the treasure-house of useful hints for mental training, which make this large and yet very amusing, as well as instructive book, an encyclopædia of well-classified and often very startling psychological experiences."--_London Spectator._ =THE EXPANSE OF HEAVEN.= A Series of Essays on the Wonders of the Firmament. By R. A. PROCTOR, B.A. "A very charming work; cannot fail to lift the reader's mind up 'through Nature's work to Nature's God.'"--_London Standard._ "Prof. R. A. Proctor is one of the very few rhetorical scientists who have the art of making science popular without making it or themselves contemptible. It will be hard to find anywhere else so much skill in effective expression, combined with so much genuine astronomical learning, as is to be seen in his new volume."--_Christian Union._ =PHYSIOLOGY FOR PRACTICAL USE.= By various Writers. Edited by JAMES HINTON. With 50 Illustrations. 1 vol., 12mo. Price, $2.25. "This book is one of rare value, and will prove useful to a large class in the community. Its chief recommendation is in its applying the laws of the science of physiology to cases of the deranged or diseased operations of the organs or processes of the human system. It is as thoroughly practical as is a book of formulas of medicine, and the style in which the information is given is so entirely devoid of the mystification of technical or scientific terms that the most simple can easily comprehend it."--_Boston Gazette._ "Of all the works upon health of a popular character which we have met with for some time, and we are glad to think that this most important branch of knowledge is becoming more enlarged every day, the work before us appears to be the simplest, the soundest, and the best."--_Chicago Inter-Ocean._ =THE GREAT ICE AGE, and its Relations to the Antiquity of Man.= By JAMES GEIKIE, F.R.S. E. With Maps, Charts, and numerous Illustrations. 1 vol., thick 12mo. Price, $2.50. "'The Great Ice Age' is a work of extraordinary interest and value. The subject is peculiarly attractive in the immensity of its scope, and exercises a fascination over the imagination so absorbing that it can scarcely find expression in words. It has all the charms of wonder-tales, and excites scientific and unscientific minds alike."--_Boston Gazette._ "Every step in the process is traced with admirable perspicuity and fullness by Mr. Geikie."--_London Saturday Review._