IN this able and thoughtful work, Mr. L. T. Hobhouse distinguishes five stages of correlation in the ascent of mind, from the first glimmerings of consciousness in some lowly organism of primeval times to the systematic thought of the man of science or the philosopher and the intuitive insight of the poet or artist. The first of these, placed in a category by itself, is the pre-intelligent stage, wherein there is an indirect correlation of experience, reaction and welfare before intelligence (which is defined as the capacity of the individual to learn from experience) comes into play. The behaviour of the organism is, at this stage3 the outcome of inherited structure, and if any variation of structure secures a more suitable response, that is, one better adapted to preserve the organism or its offspring, such a structure would tend to be “selected,” sinqe the individual in which it occurred would have an advantage in the struggle for existence. In this way, inborn tendencies to a given method of response may be correlated with the past experiences of the race. Mind in Evolution. By L. T. Hobhouse. Pp. xiv + 415. (London: Macmillan and Co., Ltd., 1901.) Price 10s. net.