passive) by a deep tone, and activity (or our active) by a high tone. This accounts for a phenomenon prevalent in other languages remote from those of the Soudan. In Semitic and Hamitic languages, the letter 'U,' particularly, has the force of a passive when occurring either as a suffix to the root of a word or in the middle of the word itself. For example, in the Hebrew forms of the so-called 'Pual' and 'Piel,' as well as 'Hophal' and 'Hiphil,' the first of each pair is passive, and the second, active in meaning. It was frequently supposed that this was accidental, or was due to linguistic causes of phonetic change other than the above. But when we meet the same variations of sound and meaning in other radically different languages, we must stop to ask ourselves whether this is not the result of a psychological relationship which, though generally lost in the later development of language, here still survives in occasional traces. In fact, when we recall the way in which we relate stories to children, we at once notice that precisely the same phenomenon recurs in child-language--a language, of course, first created, as a rule, by adults. This connection of sound and meaning is clearly due to the unconscious desire that the sound shall impart to the child not merely the meaning of the idea, but also its feeling-tone. In describing giants and monsters, she who relates fairy-tales to the child deepens her tone; when fairies, elves, and dwarfs appear in the narrative, she raises her voice. If sorrow and pain enter, the tone is deepened; with joyous emotions, high tones are employed. In view of these facts, we might say that this direct correlation of expression and meaning, observed in that most primitive of all languages, gesture-language, has disappeared even from the relatively primitive spoken languages; nevertheless, the latter have retained traces of it in greater abundance than have the cultural languages. In the cultural languages they recur, if at all, only in the onomatopoetic word-formations of later origin. We may recall such words as _sausen_ (soughing), _brummen_ (growling), _knistern_ (crackling), etc. The question still remains how the other characteristics of gesture-language, particularly the absence of grammatical categories and a syntax which follows the principle of immediate and perceptual intelligibility, compare with the corresponding characteristics of the relatively primitive spoken languages. These characteristics, indeed, are of incomparably greater importance than the relations of sound and meaning. The latter are more strongly exposed to external, transforming influences. Word-formations, however, and the position of the words within the sentence, mirror the forms of thought itself; whenever the thought undergoes vital changes, the latter inevitably find expression in the grammatical categories of the language, and in the laws of syntax which it follows. 6. THE THINKING OF PRIMITIVE MAN.