sound of certain instruments and to certain instrumental strings and to certain inflections of the voice." [Illustration: Fig. 23. THE ARAB REBEC.] The modern world is indebted to the Arab for at least three of its most important instruments of music. The ravanastron he brought home with him from India, and under the name Rebec it found its way into Europe, where in an appreciative soil it grew and expanded into that miracle of sonority and expression, the modern violin. The instrument of the south of Europe during the latter part of the Middle Ages was the lute, which had its origin in the Arab Eoud. (See Fig. 24.) [Illustration: Fig. 24. THE EOUD.] Still more familiar to domestic eyes is that descendant of the Arab santir, the modern pianoforte. This, under the name of psaltery, begins to figure in manuscript as early as the ninth century. The Arab canon, which is commonly taken as the immediate predecessor of the pianoforte, had the important difference of being strung with catgut strings. The essential foundation of the pianoforte was the metal strings, necessitating hammers for inciting the vibrations, and affording in the superior solidity incident to metal support a firmness and susceptibility to development. This is the santir. It has survived in Europe as the dulcimer, or the German hackbrett. [Illustration: Fig. 25. THE SANTIR.] Yet while the Arab wrote so abundantly upon the subject of music, and while it filled so prominent a part in his social and official life, and in spite of his sagacity in seizing perfectible types of instruments, there is very little in his treatment of the art which need delay us in the present work. His music belongs entirely to the ancient period of monody. He never had a harmony of combined sounds, nor a scale with intervals permitting combined sounds. He was sufficiently scientific to carry out the intonations of the Pythagorean theory, and when he went beyond this and formed a scale for himself he devised one which did not permit the association of sounds into chord masses; and, more fatal still, he not only invented such a scale, but carried it into execution so exactly that the ear of the race was hopelessly committed to monody, and has remained so until this very day. The scale of the Arabs in the latter times contained twenty-two divisions in the octave, of which only the fifth and fourth exactly correspond with the harmonic ratios. The place of the Arab in music, therefore, is that of an unintentional minister to a higher civilization and to the art of music. CHAPTER VIII. ORIGIN OF THE GREAT FRENCH EPICS.