d week, as well as _ma-oe-[)e]_, _h[)a]_,
_[=a]_, _ho-ich_. The _i_ here appeared more distinct than in the third
month. The soft _ch_, which sounded like the _g_ in "Honig," was
likewise quite distinct.

About this time began the amusing loud "crowing" of the child, an
unmistakable expression of pleasure. The strong aspirate sound _ha_, and
this sound united with the labial _r_ in _brrr-ha_; corresponding in
force to the voice, which had become exceptionally powerful, must
likewise be regarded as expressions of pleasure. So with the sounds
_aja_, _oerrgoe_, _[=a]-[=a]-i-[)o]-[=a]_, which the child toward the end
of the first half-year utters as if for his own gratification as he lies
in comfort. With these belongs also the frequently repeated "eu" of the
French "heure," and the "oeu" of the French "coeur," which is not
found in the German language, also the primitive sounds _ae_ and _oe_
(German). The lips contract very regularly, and are protruded equally in
the transition from _ae_ to _oe_. I heard also _ijae_ cried out by the
child in very gay mood. In the babbling and crowing continued often for
a long time without interruption, consonants are seldom uttered, pure
vowels, with the exception of _a_, less often than _ae_ and _oe_; _i_ and
_u_ are especially rare.

When the child lies on his back, he moves his arms and legs in a lively
manner even without any external provocation. He contracts and expands
all the muscles he can command, among these especially the muscles of
the larynx, of the tongue, and of the aperture of the mouth. In the
various movements of the tongue made at random it often happens that the
mouth is partly or entirely closed. Then the current of air that issues
forth in breathing bursts the barrier and thus arise many sounds, among
them some that do not exist in the German language, e. g., frequently
and distinctly, by means of labio-lingual stoppage, a consonant-sound
between _p_ and _t_ or between _b_ and _d_, in the production of which
the child takes pleasure, as he does also in the labial _brr_ and _m_.
By far the greater part of the consonant-sounds produced by the
exercises of the tongue and lips can not be represented in print; just
as the more prolonged and more manifold movements of the extremities,
movements made by the child when he has eaten his fill, and is not
sleepy and is left to himself, can not be drawn or described. It is
noteworthy that all the utterances of sound are expira