What qualities besides brilliancy are shown in his works? In what form are some of his most delightful pieces written? Tell about Mozart’s compositions for orchestra. What three elements did Mozart consider necessary for the interpretation of piano music? [Illustration: LUDWIG VAN BEETHOVEN.] LESSON XXXII. LUDWIG VAN BEETHOVEN. =Formalism of Haydn and Mozart=.—It has been seen that the forms of harmonic music, growing out of numerous and sometimes crude experiments, were brought to a high state of perfection through the genius of Haydn and Mozart; and that they left a definite structure, nicely balanced, capable of expressing definite thoughts in a unified form, and at the same time of allowing free rein to the composer’s fancy. Of their instrumental works, the definition of the musician-philosopher J. J. Rousseau (d. 1778), that “music is the art of combining sounds in a manner agreeable to the ear,” gave a fitting characterization; for while a tinge of melancholy is occasionally perceptible, and there are passages of some dramatic intensity, nevertheless such elements are introduced mainly to give a pleasing contrast from the even flow of polished and idealized sound. =Their Gift to Beethoven=.—In other words, neither Haydn nor Mozart ever sacrifices his sense of artistic finish to the expression of the heights and depths of human emotion. Putting the seal of genius upon instrumental forms, they transmitted these forms to another more colossal mind, which should make use of them, to be sure, but should absolutely subordinate them to the expression of the burning thoughts and passions of a great individuality; a mind which, like that of Shakespeare, was able to look fearlessly upon universal truths, and to bring these to the light, in this instance through the medium of tone. While their predecessors, by unwearying attempts, made possible this determination of a capable art form, so Haydn and Mozart, in their turn, paved the way for the fuller expression which Beethoven gave to music, and which would otherwise not have been possible, since the vehicle for his thoughts would have been wanting. Thus the opportunity had arrived for broadening the definition which Rousseau gave, and announcing the fact that music is the art of the expression of every emotion, whether pleasurable or painful, through the medium of highly organized sound.