But even these significant facts do not exhaust the aspects in which Beethoven anticipated later artistic developments. It is a very strange fact that after his deafness was quite established his sense of tone color continued to expand. Even in comparatively early works he had shown gravitation toward romantically characteristic effects of instrumentation, as, for instance, in the familiar and supremely wonderful color scheme of the scherzo of the C minor symphony. But after he had quite lost his hearing his color sense grew in richness and depth and variety to a bewildering extent. His mind seemed to be specially occupied with finding tone colors which intensified the expression in quite a new way, as, for instance, in the huge slow movement of the sonata in B flat, opus 106, in the last movement of the sonata in C minor, opus 111, and in the slow movement of the Choral Symphony. Prior to his time there had been a great deal of inert matter in orchestral scoring. The functions of wind instruments were indeed defined, in so far as they were used either as actual solo instruments or more often to supply a pleasant continuity of tone in agreeable colors, while the strings did most of the actual talking. But the standard of execution of the players, as well as the technique of orchestration, was not advanced enough to bring the wind instruments fairly into the operation on an equality with the strings, and they were made to play what was definitely serviceable to the scheme, but had in itself no musical definition and purpose. The greater part of the advance that has since taken place in orchestration consists in making every member of the orchestra contribute to the complex of polyphony by playing actual and apt musical passages. It implied the growth of texture toward vitality in every part of the artistic scheme, and a development of organization of the very subtlest description. For it must be kept in mind that the employment of instruments of diverse tone color in the modern manner does not imply their constant employment, but their apt employment only; which is so contrived by the genius of composers who can really think in orchestras that the tone qualities affect the sensibilities of the hearers to the utmost by their relations to one another. Even the feeblest intelligence would be capable of discerning the fact that great effects of color are made through juxtaposition. A very vivid piece of coloring is not vivid because the individual colors are vivid, but because various colors are disposed so as to give particular colors their utmost effect upon the sensibilities. A glowing red does not glow of itself but because the sensibilities have been so affected by other colors that they have become highly susceptible to red. Groups of nerves are affected in various ways by tone colors, and the secret of art is so to use the various tone colors that each shall minister in full measure to the effect of others.