The totemic age may be said to include only the first few advances beyond the simple emotions already expressed in the dance. Nevertheless, there are ethnological differences that register in a very characteristic way those specific musical talents of the various races which are obscured on higher levels of culture because of the increasing complexity of international relations. Thus, Africa is apparently the chief centre, if not the original home, of instruments of concussion and of the great variety of stringed instruments that develop from them. America, on the other hand, is the region in which wind instruments, in particular their original form, the flute, have attained their chief development. The flute of the American Indians is not, of course, like our own; it is blown, not with the lips, but with the mouth. It therefore resembles a shawm or a clarinet. As regards production of tone, however, it is a flute, for the tone is produced by the extension of one lip over the other in a manner similar to that of the flute-pipes of our organs. That which distinguishes the sound of the flute and of its shorter form, the fife, from that of stringed instruments is primarily the greater intensity and the longer duration of the tone. Corresponding to the difference in musical instruments is that of the noise instruments which characterize the two regions. Africa possesses the drum. This it employs not only for purposes of accompaniment in cult ceremonies, but also as a means of signalling, since it renders distant communication possible by use of the so-called drum-language. In America, we find the rattle. Though this, of course, is not entirely lacking in Africa, it nevertheless occurs primarily within the cultural realm of the North American Indians. Here it is employed as an instrument of noise and magic, similarly to the bull-roarer of the Australians. As between the rattle and the drum, the difference is again one of the longer duration of sound in the case of the American instrument.