Another case is reported by Eduard Schulte: A boy of a year and three quarters applied the joyous outcry _ei_ (which may be an imitated interjection), modifying it first into _eiz_, into _aze_, and then into _ass_, to his wooden goat on wheels, and covered with rough hide; _eiz_, then, became exclusively a cry of joy; _ass_, the name for everything that moved along--e. g., for animals and his own sister and the wagon; also for everything that moved at all; finally, for everything that had a rough surface. Now, as this child already called all coverings of the head and covers of cans _huta_, when he saw, for the first time, a fur cap, he at once christened it _ass-huta_. Here took place a decided subordination of one concept to another, and therewith a new formation of a word. How broad the comprehensiveness of the concept designated _huta_ was, is perceived especially in this, that it was used to express the wish to have objects at which the child pointed. He liked to put all sorts of things that pleased him upon his head, calling them _huta_. Out of the _huta_, for "I should like to have that as a hat" grew, then, after frequent repetition, "I should like that." There was in this case an extension of the narrower concept, after it had itself experienced previously a differentiation, and so a limitation, by means of the suffix _ass_. These examples show how independent of words the formation of concepts is. With the smallest stock of words the concepts are yet manifold, and are designated by the same word when there is a lack of words for the composition of new words, and so for fresh word-formation. The formation of words out of interjections without imitation has not been observed. Here belongs the _rollu_, _rollolo_, uttered by my boy, of his own accord, on seeing rolling balls or wheels; and (in the twentieth month) _rodi_, _otto_, _rojo_, where the rotation perceived by the child occasions at once the one or the other exclamation containing _l_ or _r_. In the case of Steinthal, it was _lu-lulu_; in the case of a boy a year and a half old, observed by Kussmaul, it was _golloh_. In these cases the first interjection is always occasioned by a _noise_, not simply by the sight of things rolling without noise. The interjection must accordingly be styled imitative. A combination of the original--i. e., inborn--interjectional sounds into syllables and groups of syllables, without the assistance of members of the family, and without imitation, for the purpose of communicating an idea, is not proved to exist.