Corresponding to this inability to say words after another's utterance of them is an articulation as yet very imperfect. Still, there is indication of progress in the distinctness of the _s_, the frequent English _th_ with the thrusting out of the tip of the tongue between the incisors, the _w_, which now first appears often, as well as in the _smacking_ first heard in the sixty-fifth week (in contented mood). The tongue is, when the child is awake, more than other muscles that in the adult are subject to cerebral volition, almost always in motion even when the child is silent. It is in various ways partly contracted, extended, bent. The lateral bending of the edges of the tongue downward and the turning back of the tip of the tongue (from left to right) so that the lower surface lies upward, are not easily imitated by adults. The mobility of my child's tongue is at any rate much greater than that of my tongue, notwithstanding the fact that, in consequence of varied practice from an early period in rapid speaking, the most difficult performances in rapid speaking are still easily executed by mine. The tongue is unquestionably the child's favorite plaything. One might almost speak of a lingual delirium in his case, as in that of the insane, when he pours forth all sorts of disconnected utterances, articulate and inarticulate, in confusion; and yet I often saw his tongue affected with fibrillar contractions as if the mastery of the hypoglossus were not as yet complete. Quite similar fibrillar movements seem to be made by the tongue in bulbar paralysis, and in the case of dogs and guinea-pigs whose hypoglossus has been severed. To the number of words heard that already produce a definite movement are added the following new ones. The child is asked, "Where is the moon? the clock? the eye? the nose?" and he raises an arm, spreads the fingers, and looks in the proper direction. If I speak of "coughing," he coughs; of "blowing," he blows; of "kicking," he stretches out his legs; of "light," he blows into the air, or, if there is a lamp in sight, toward that, looking at it meantime--a reminiscence of the blowing out of matches and candles often seen by him. It requires great pains to get from him the affirmative nod of the head at the spoken "ja, ja." Not till the sixty-fourth week was this achieved by means of frequent repetition and forcible direction, and the movement was but awkwardly executed even later--months after. On hearing the "no, no," the negative shake of the head now appeared almost invariably, and this was executed as by adults without the least uncertainty. The holding out of his hand at hearing "Give the hand," occurs almost invariably, but is not to be regarded as a special case of understanding of the syllable "give," for the word "hand" alone produces the same result.