roduce into his vocabulary only one new word. In the
sixty-third week he seized a biscuit that had been dipped in hot water,
let it fall, drew down the corners of his mouth, and began to cry. Then
I said "heiss" (hot), whereupon the child, speedily quieted, repeated
_hai_ and _hai-s_ (with a just discernible _s_). Three days later the
same experiment was made. After this the _hais_, _haisses_, with
distinct _s_, was often heard without any occasion. Some days later I
wanted him to say "hand." The child observed my mouth closely, took
manifest pains, but produced only _ha-iss_, then very distinctly _hass_
with sharp _ss_, and _ha-ith_, _hadith_, with the English _th_; at
another time distinctly _ha-its_. Thus, at a time when _ts_ = _z_ can
not be repeated, there exists the possibility of pronouncing _z_. When I
said to him "warm," _ass_ was pronounced with an effort and distinctly,
although the syllable _wa_ belonged to the child's stock of words. This
was evidently a recollection of the previous attempts to repeat "heiss"
and "hand."

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 fibril