“With the author’s inclination and capacity to regard public questions in their scientific aspects, many readers are already familiar through his suggestive volume entitled ‘Physics and Politics.’ ‘The English Constitution’ is a work of the same quality, and treats its subjects very much with reference to the principles of human nature and the natural laws of human society. It is a free disquisition on English political experience; an acute, critical, and dispassionate discussion of English institutions designed to show how they operate, and to point out their defects and advantages. The writer is not so much a partisan or an advocate, as a cool, philosophical inquirer, with large knowledge, clear insight, independent opinions, and great freedom from the bias of what he terms that ‘territorial sectarianism called patriotism.’ His criticism of the faults of the English system is searching and trenchant, and his appreciation of its benefits and usefulness is cordial, discriminating, and wise. The book, indeed, is full of instructive episodes, and sagacious reflections on the springs of action in human nature, the exercise of power by individuals or political bodies, the adaptation of institutions to the qualities and circumstances of the different classes who live under them, and numerous points of political philosophy, which are applicable everywhere and have an interest for all students of political and social affairs.”--_Extract from preface._ THE VARIOUS CONTRIVANCES BY WHICH ORCHIDS ARE FERTILIZED BY INSECTS. By CHARLES DARWIN, M. A. Second edition, revised. With Illustrations. 1 vol., 12mo. Cloth. Price, $1.75. “Mr. Darwin has prepared a new edition of his work on the fertilization of orchids by insects, which was published in 1862, and has been for some time out of print. He has, during the interval, received a great deal of information on the subject from various correspondents, and has also continued his own researches; and he has used the materials thus obtained in remodeling the original work. The object which the writer has in view is, as he explains, not only to show how wonderfully complex and perfect are the contrivances by which orchids are fertilized with pollen brought by insects from a distinct plant, but also to support his theory that ‘it is an almost universal law of Nature that the higher organic beings require an occasional cross with another individual; or, which is the same thing, that no hermaphrodite fertilizes itself for a perpetuity of generations.’”--_Saturday Review._ BLACK SPIRITS AND WHITE. By FRANCES ELEANOR TROLLOPE, author of “a Charming Fellow,” etc. 1 vol., 8vo. Illustrated. Paper covers. Price, 75 cents.