The same child, who likes to hold a biscuit to the mouth of any member of the family to whom he is favorably disposed, offered the biscuit in the same way, entirely of his own accord, to his own foot--sitting on the floor, holding the biscuit in a waiting attitude to his toes--and this strange freak was repeated many times in the twenty-third month. The child amused himself with it. Thus, at a time when the attention to what is around is already very far developed, one's own person may not be distinguished from the environment. Vierordt thinks that a discrimination between the general feelings [i. e., those caused by bodily states] and the sensations that pertain to the external world exists in the third month. From my observations I can not agree with him; for, although the division may begin thus early, yet it does not become complete until much later. In the ninth month the feet are still eagerly felt of by the little hands, though not so eagerly as before, and the toes are carried to the mouth like a new plaything. Nay, even in the nineteenth month it is not yet clear how much belongs to one's own body. The child had lost a shoe. I said, "Give the shoe." He stooped, seized it, and gave it to me. Then, when I said to the child, as he was standing upright on the floor, "Give the foot," in the expectation that he would hold it out, stretch it toward me, he grasped at it with both hands, and labored hard to get it and hand it to me. How little he understands, even after the first year of his life has passed, the difference between the parts of his own body and foreign objects is shown also in some strange experiments that the child conducted quite independently. He sits by me at the table and strikes very often and rapidly with his hands successive blows upon the table, at first gently, then hard; then, with the right hand alone, hard; next, suddenly strikes himself with the same hand on the mouth; then he holds his hand to his mouth for a while, strikes the table again with the right hand, and then on a sudden strikes his own head (above the ear). The whole performance gave exactly the impression of his having for the first time noticed that it is one thing to strike oneself, one's own hard head, and another thing to strike a foreign hard object (forty-first week). Even in the thirteenth month the child often raps his head with his hand to try the effect, and seems surprised at the hardness of the head. In the sixteenth month he used not unfrequently to set the left thumb against the left side of the head, and at the same time the right thumb against the right side of the head, above the ears, with the fingers spread, and to push at the same time, putting on a strange, wondering expression of face, with wide-open eyes. This movement is not imitated and not inherited, but invented. The child is doubtless making experiments by means of it upon the holding of the head, head-shaking, resistance of his own body, perhaps also upon the