and how they harmonized, listening to the score and applying the rules taught me by my father. "It was hungry work, in a land where the sun always shines, where art is all pervading, but where there is no pay for the artist, since Rome is but nominally the Sovereign of the Christian world. Sometimes made welcome, sometimes scouted for my poverty, I never lost courage. I heard a voice within me promising me fame. "Music seemed to me in its infancy, and I think so still. All that is left to us of musical effort before the seventeenth century, proves to me that early musicians knew melody only; they were ignorant of harmony and its immense resources. Music is at once a science and an art. It is rooted in physics and mathematics, hence it is a science; inspiration makes it an art, unconsciously utilizing the theorems of science. It is founded in physics by the very nature of the matter it works on. Sound is air in motion. The air is formed of constituents which, in us, no doubt, meet with analogous elements that respond to them, sympathize, and magnify them by the power of the mind. Thus the air must include a vast variety of molecules of various degrees of elasticity, and capable of vibrating in as many different periods as there are tones from all kinds of sonorous bodies; and these molecules, set in motion by the musician and falling on our ear, answer to our ideas, according to each man's temperament. I myself believe that sound is identical in its nature with light. Sound is light, perceived under another form; each acts through vibrations to which man is sensitive and which he transforms, in the nervous centres, into ideas. "Music, like painting, makes use of materials which have the property of liberating this or that property from the surrounding medium and so suggesting an image. The instruments in music perform this part, as color does in painting. And whereas each sound produced by a sonorous body is invariably allied with its major third and fifth, whereas it acts on grains of fine sand lying on stretched parchment so as to distribute them in geometrical figures that are always the same, according to the pitch,--quite regular when the combination is a true chord, and indefinite when the sounds are dissonant,--I say that music is an art conceived in the very bowels of nature. "Music is subject to physical and mathematical laws. Physical laws are but little known, mathematics are well understood; and it is since their relations have been studied, that the harmony has been created to which we owe the works of Haydn, Mozart, Beethoven, and Rossini, grand geniuses, whose music is undoubtedly nearer to perfection than that of their precursors, though their genius, too, is unquestionable. The old masters could sing, but they had not art and science at their command,--a noble alliance which enables us to merge into one the finest melody and the power of harmony. "Now, if a knowledge of mathematical laws gave us these four great