2. Changes in the Mental Nature.--These are at least as remarkable as the changes in the bodily framework. There is a slight diminution in the power of memorising, but the faculties of attention, of reasoning, and of imagination, develop rapidly. Probably the power of appreciation of the beautiful appears about this time, a faculty which is usually dormant during childhood. More especially is this true with regard to the beauty of landscape; the child seldom enjoys a landscape as such, although isolated beauties, such as that of flowers, may sometimes be appreciated. As might be anticipated, all things are changing with the child during these momentous years: its outlook on life, its appreciation of other people and of itself, alter greatly and continuously. The wonderfully rapid growth and alterations in structure of the generative organs have their counterpart in the mental and moral spheres; there are new sensations which are scarcely recognised and are certainly not understood by the subject: vague feelings of unrest, ill-comprehended desires, and an intense self-consciousness take the place of the unconscious egoism of childhood. The processes of Nature as witnessed in the season of spring have their counterpart in the changes that occur during the early years of adolescence. The earth warmed by the more direct rays of the sun and softened by recurring showers is transformed in a few weeks from its bare and dry winter garb into the wonderful beauty of spring. This yearly miracle fails to impress us as it should do because we have witnessed it every year of our lives, and so, too, the great transformation from child to budding woman fails to make its appeal to our understanding and sympathy because it is of so common occurrence. If it were possible for adults to really remember their own feelings and aspirations in adolescent years, or if it were possible for us with enlightened sympathy to gain access to the enchanted garden of youth, we should be more adequate guides for the boys and girls around us. As it is we entirely fail to appreciate the heights of their ambitions, hopes, and joys, and we have no measure with which to plumb the depths of their fears, their disappointments, and their doubts. The transition between radiant joy and confident hope in the future to a miserable misinterpretation of sensations both physical and psychical are rapid. It is the unknown that is terrible to us all, and to the child the changes in its body, the changes in its soul and spirit, which we pass by as commonplace, are full of suggestions of abnormality, of disaster, and of death. Young people suffer much from the want of comprehension and intelligent sympathy of their elders, much also from their own ignorance and too fervid imagination. The instability of the bodily tissues and the variability of their functions find a counterpart in the instability of the mental and moral natures and in the variability of their phenomena. Adolescents