Another theory of the origin of music is that it arose through the imitation by primitive man of bird-songs and other sounds in Nature. It is true that in a collection of the music of many savage tribes there are numerous songs which are certainly imitations of certain bird calls and other animal cries. Particularly are these to be noted in the music of the North American Indians. They have 'Pelican,’ 'Crane,’ 'Elk,’ and 'Buffalo’ songs, and even songs imitating the wind in the pines. Their animal songs are to a large extent but slight developments of the cry of the animal himself. This cry was probably first used by the primitive hunter as a decoy, and eventually through frequent use became a recognized song. Although many primitive songs have undoubtedly arisen in this way, the theory of imitation considered as an explanation of the origin of music is somewhat in discredit with ethnologists and philosophers. It is much too partial and there are too many cases to which it certainly cannot apply. In his study _Arbeit und Rhythmus_ Karl Bücher advances the idea that through regular 'work’ of any kind 'song’ as an accompaniment is naturally induced. The regularity of the 'work,’ be it walking, driving a stake, or grinding corn in a hollowed-out stone, supplies one element of music; i. e., rhythm. One element of a tune being present, what more natural than an attempt on the part of the worker to supply the other element and thus lighten the labor? Especially is this likely to happen if the task require several workers who are obliged to work together, somewhat in unison. Bücher says 'Song is the offspring of labor. It is a means employed to discipline individual activities to the accomplishment of a common task.’ Leaving out of consideration, however, all external stimuli which may or may not have had a determinative influence in the development of primitive music, we cannot but think of the remark of Karl Böckel, which strikes the note of truth: 'Song has its origin in the cry of joy or sorrow; in the need of expression inborn in all peoples in a state of nature.’ II