The development of these primitive wind instruments is usually ascribed to a slightly later period than that of the development of the first percussion instruments. The construction of wind instruments is considered to represent a slightly higher degree of mental development in man, and hence they are not regarded by ethnologists as being so primitive as the percussion instruments. Nevertheless Wallaschek insists that the first instruments to be developed were wind instruments, alleging in proof the discovery of some Egyptian flutes which he asserts antedate any other musical instruments of which we have any record. It is certainly true that the physical organism of man contains in itself the prototype of all wind instruments, i. e., the voice. But it is equally true that hand clapping and the stamping of the feet are also native to him, and these are undoubtedly the prototypes of all percussion instruments. The isolated fact of the discovery of these flutes is not of sufficient weight, to our mind, to justify the belief that wind instruments were developed anterior to percussion instruments. As the appreciation of the fact of definite musical tones being obtainable on instruments took root and grew in the human mind, and especially as these tones began to be arranged in definite series or scales, another instrument of a remarkable nature was developed. It was a percussion instrument, but one on which could be produced not only a tone having a definite pitch, but a whole series or scale of tones. Hence it was as capable of reproducing a melody as some of the primitive pipes or flutes. This was the xylophone. This instrument, having its far distant origin in the two sticks of wood which were struck together to produce a rhythmical noise by the most primitive savages, has been brought to its greatest perfection by the Africans and the Guatemalans. Its principle of construction is similar to that of the Pan’s Pipes; a series of sticks or bars of wood arranged according to their relative lengths; the longer giving forth the lower tones, and the tones growing higher in pitch as the sticks grow shorter. The series of sounding sticks of wood are in Africa usually fixed over a gourd, a series of gourds, or a drum-like instrument which acts as a sounding-board, thus giving the pieces of wood greater sonority. This instrument, as it is found among many of the African tribes, has a compass of from one to two octaves and gives approximately the tones of our usual diatonic scale. It aroused the admiration of Junod to such an extent that he refers to it as the 'African piano,’ not an inapt name, by the way. The _marimba_ of the Guatemalans, while not exactly a xylophone, is a percussion instrument which is capable of giving a scale of definite tones. According to Wallaschek 'it consists of a number of gourds (as many as sixteen) covered with a flat piece of wood, beaten with a stick, and produces