"The book contains a series of diagrams, displaying the effects of sleep and meals on pulsation and respiration, and of various kinds of food on respiration, which, as the results of Dr Smith's own experiments, possess a very high value. We have not far to go in this work for occasions of favorable criticism; they occur throughout, but are perhaps most apparent in those parts of the subject with which Dr. Smith's name is especially linked."--_London Examiner._ "The union of scientific and popular treatment in the composition of this work will afford an attraction to many readers who would have been indifferent to purely theoretical details.... Still his work abounds in information, much of which is of great value, and a part of which could not easily be obtained from other sources. Its interest is decidedly enhanced for students who demand both clearness and exactness of statement, by the profusion of well executed woodcuts, diagrams, and tables, which accompany the volume.... The suggestions of the author on the use of tea and coffee, and of the various forms of alcohol, although perhaps not strictly of a novel character, are highly instructive, and form an interesting portion of the volume."--_N. Y. Tribune._ IV. Body and Mind. THE THEORIES OF THEIR RELATION. By ALEXANDER BAIN, LL.D. 1 vol., 12mo. Cloth Price, $1.50. PROFESSOR BAIN is the author of two well-known standard works upon the Science of Mind--"The Senses and the Intellect," and "The Emotions and the Will." He is one of the highest living authorities in the school which holds that there can be no sound or valid psychology unless the mind and the body are studied, as they exist, together. "It contains a forcible statement of the connection between mind and body, studying their subtile interworkings by the light of the most recent physiological investigations. The summary in Chapter V., of the investigations of Dr. Lionel Beale of the embodiment of the intellectual functions in the cerebral system, will be found the freshest and most interesting part of his book. Prof. Bain's own theory of the connection between the mental and the bodily part in man is stated by himself to be as follows: There is 'one substance, with two sets of properties, two sides, the physical and the mental--a _double-faced unity_.' While, in the strongest manner, asserting the union of mind with brain, he yet denies 'the association of union _in place_,' but asserts the union of close succession in time,' holding that 'the same being is, by alternate fits, under extended and under unextended consciousness.'"--_Christian Register._ V. The Study of Sociology. By HERBERT SPENCER. 1 vol., 12mo. Cloth Price, $1.50.