The voice is very powerful as early as the sixth day, especially when it announces feelings of discomfort. Screaming is much more frequent, persistent, and vigorous also when diluted cow's milk is given instead of that from the breast. If one occupies himself longer than usual with the infant (in the first two months), the child is afterward more inclined to cry, and cries then (as in the case of hunger) quite differently from what he does when giving notice of something unpleasant—e. g., wetness. Directly upon his being made dry, the crying ceases, as now a certain contentment is attained. On the other hand, the inclination to cry serves very early (certainly from the tenth week on) as a sign of well-being (or increase in the growth of the muscles). At least a prolonged silence at this season is wont to be connected with slight ailment. But it is to be remarked that during the whole period no serious illness, lasting more than one day, occurred.
On the forty-third day I heard the first consonant. The child, in a most comfortable posture, uttering all sorts of obscure sounds, said once distinctly am-ma. Of vowels, ao was likewise heard on that day. But, on the following day, the child surprised me and others by the syllables, spoken with perfect distinctness, ta-hu.
On the forty-sixth day, in the otherwise unintelligible babble of the infant, I heard, once each, gö (ö nearly like i in bird), örö, and, five days later, ara.
In the eighth and ninth weeks, the two utterances, örrö, arra, became frequent, the ö and a being pure and the r uvular.
The syllable ma I heard by itself (it was during his crying) for the first time on the sixty-fourth day. But on the following day was sounded, during persistent, loud crying, often and distinctly (it returned in like manner months after), nei, nei, nei, and once, during his babbling, a-omb.
On the day after, distinctly, once each, la, grei, aho, and, besides, ma again.
On the sixty-ninth day, the child, when hungry, uttered repeatedly and very distinctly, mömm and ngö.
Of the syllables earlier spoken, only örrö is distinctly repeated in the tenth week. On the seventy-first day, the child being in the most comfortable condition, there comes the new combination, ra-a-ao, and, five days later, in a hungry and uncomfortable mood, nä, and then nāi-n.
The manifest sign of contentment was very distinct (on the seventy-eighth day): habu, and likewise in the twelfth week a-i and uāo, as well as ä-o-a, alternating with ä-a-a, ando-ä-ö.
It now became more and more difficult to represent by letters the sounds, already more varied, and even to distinguish the vowels and repeat them accurately. The child cries a good deal, as if to exercise his respiratory muscles. To the sounds uttered while the child is lying comfortably are added in the fourteenth week ntö, ha. The last was given with an unusually loud cry, with distinct aspiration of the h, though with no indication that the child felt any particular pleasure. At this period I heard besides repeatedly lö, na, the latter along with screaming at disagreeable impressions more and more frequently and distinctly; in the fifteenth week, nannana, nā-nā, nanna in refusal. On the other hand, the earlier favorite örrö has not been heard at all for some weeks.