knowledge and experience have yet gone, however, there is a sense in which the productions of these great masters are likely to remain long unmatched in beauty and worth. Nothing has been done since that surpasses the sustained beauty of the Beethoven adagios, of which we find the most beautiful specimens naturally among the orchestral pieces and in the chamber music, where he could depend upon the long phrases and sustained tones of the violins. But in the sonatas for pianoforte he is equally at home. He seems to have foreseen the possibilities of the modern piano. In his latest sonatas there are passages which foresee the modern technique, and suggest effects which only the pianoforte of the past thirty years has been capable of attaining. This is the prophetic element in the writings of this great master. The same difference in the sweep of mind shows itself in the lighter movements. In the minuets Haydn is playful, Mozart is occasionally tender and arch; Beethoven alone is vigorous and humoristic in the modern sense. And, in the finales of the sonatas there is a movement in those of Beethoven which we look for in vain in those of the older composers. It was not in Haydn, nor yet in Mozart, to play with tones in this masterly spirit. Hence the true relation of these great masters might be summed up without intending to be disrespectful to either, as the following: Haydn provided the form, the order of keys and the general character of the contrasts between the two subjects. Mozart invented a myriad of tender _nuances_ which illustrated the fine points of music, and imparted to the works a sweetness and pleasing quality which everybody recognized as irresistible. Beethoven added to these ingredients of popular music a depth, a soulful quality, an earnestness and a universal intelligibility to spirits of the necessary depth, which have stood to all the world ever since as models. Such, in general, are the points of relation and of contrast. It is not to be overlooked, however, that the tendency of musical taste is to leave the works of Mozart behind. Haydn is gaining ground, relatively, through the admiration of musicians for the cleverness with which he treats themes. Beethoven holds his own by reason of his vigorous personality, which is to be felt in every page of his music. Mozart, however, appeals less to the taste of the present time, and his pianoforte works are now cultivated chiefly for technical purposes, in the earlier stages of study. [Illustration] CHAPTER XXIX. OPERA IN THE EIGHTEENTH CENTURY. I.