and gestures of the speaker, although the child himself makes audible no articulate utterance except his own, for the most part meaningless, variable babble of sounds and syllables and outcries. The causes of the slowness of the progress in expressing in articulate words what is understood and desired, on the part of normal children, is not, however, to be attributed, as it has often been, to a slower development of the expressive motor mechanism, but must be looked for in the difficulty of establishing the connection of the various central storehouses of sense-impressions with the intercentral path of connection between the acoustic speech-centers and the speech-motorium. For the purely peripheral articulatory acts are long since perfect, although as yet a simple "_a_" or "_pa_" can not be repeated after another person; for these and other sounds and syllables are already uttered correctly by the child himself. The order of succession in which these separate sounds appear, without instruction, is very different in individual cases. With my boy, who learned to speak rather late, and was not occupied with learning by heart, the following was the order of the perfectly pure sounds heard by me: On the left are the sounds or syllables indicated by one letter; on the right, the same indicated by more than one letter; and it is to be borne in mind that the child needs to pronounce only fourteen of the nineteen so-called consonants of the German alphabet in order to master the remaining five also; for c = ts and k v = f and w x = ks and gs q = ku and kw z = ts and ds and of the fourteen four require no new articulation, because p is a toneless b t is a toneless d f is a toneless w k is a toneless g Of the ten positions of the mouth required for all the consonants of the alphabet, nine are taken by the child within the first six months:*