Darwin observed (_A Biographical Sketch of an Infant_ in "Mind, a Quarterly Review of Psychology and Philosophy," July, 1877, pp. 285-294) in a son of his, on the forty-seventh day of his life, a formation of sounds without meaning. The child took pleasure in it. The sounds soon became manifold. In the sixth month he uttered the sound _da_ without any meaning; but in the fifth he probably began to try to imitate sounds. In the tenth month the imitation of sounds was unmistakable. In the twelfth he could readily imitate all sorts of actions, such as shaking his head and saying "Ah." He also understood intonations, gestures, several words, and short sentences. When exactly seven months old, the child associated his nurse with her name, so that when it was called out he would look round for her. In the thirteenth month the boy used gestures to explain his wishes; for instance, he picked up a bit of paper and gave it to his father, pointing to the fire, as he had often seen and liked to see paper burned. At exactly the age of a year he called food _mum_, which also signified "Give me food," and he used this word instead of beginning to cry as formerly. This word with affixes signified particular things to eat; thus _shu-mum_ signified sugar, and a little later licorice was called _black-shu-mum_. When asking for food by the word _mum_ he gave to it a very strongly marked tone of longing (Darwin says an "interrogatory sound," which should mean the same thing). It is remarkable that my child also, and in the tenth week for the first time, said _moemm_ when he was hungry, and that a child observed by Fritz Schultze (Dresden) said _maem-maem_. Probably the syllable has its origin from the primitive syllable _ma_ and from hearing the word "mamma" when placed at the breast of the mother. Of the facts communicated by the physiologist Vierordt concerning the language of the child ("Deutsche Revue" of January, 1879, Berlin, pp. 29-46) should be mentioned this, that a babe in its second month expressed pleasure by the vowel _a_, the opposite feeling by _ae_. This is true of many other children also. In the third and fourth months the following syllables were recognizable: _mam_, _aemma_, _fu_, _pfu_, _ess_, _aeng_, _angka_, _acha_, _erra_, _hab_. A lisping babe said, countless times, _hab_, _hob_, _ha_. These syllables coincide in part with those given by other observers. The _pf_ and _ss_ only have not been heard by me at this age, and I doubt whether _f_, for which teeth are needed, was produced with purity so early. In the second and third years a child pronounced the following words: _beb_ (for boes, naughty); _bebe_ (Besen, _beesann_, broom); _webbe_ (Wasser, _watja_, water); _wewe_ (Loewe, _loewee_, lion); _ewebau_ (Elephant, _elafant_); _webenau_ (Fledermaus, _lebamaunz_, bat); _babaube_ (Blasebalg, _ba-abats_, bellows); _ade_ (Hase, hare); _emele_ (Schemel, footstool); _gigod_ (Schildkroete, tortoise).