The most noteworthy thought on aesthetic of this period is perhaps to be found among the aestheticians of special branches of the arts, and since we know that laws relating only to special branches are not conceivable, this thought may be considered as bearing upon the general theory of Aesthetic. The Bohemian critic E. Hanslick (1854) is perhaps the most important of these writers. His work _On Musical Beauty_ has been translated into several languages. His polemic is chiefly directed against R. Wagner and the pretension of finding in music a determined content of ideas and feelings. He expresses equal contempt for those sentimentalists who derive from music merely pathological effects, passionate excitement, or stimulus for practical activity, in place of enjoying the musical works. "If a few Phrygian notes sufficed to instil courage into the soldier facing the enemy, or a Doric melody to assure the fidelity of a wife whose husband was absent, then the loss of Greek music may cause pain to generals and to husbands, but aestheticians and composers will have no reason to deplore it." "If every Requiem, every lamenting Adagio, possessed the power to make us sad, who would be able to support existence in such conditions? But if a true musical work look upon us with the clear and brilliant eyes of beauty, we feel ourselves bound by its invincible fascination, though its theme be all the sorrows of the century." For Hanslick, the only end of music was form, or musical beauty. The followers of Herbart showed themselves very tender towards this unexpected and vigorous ally, and Hanslick, not to be behindhand in politeness, returned their compliments, by referring to Herbart and to R. Zimmermann, in the later editions of his work, as having "completely developed the great aesthetic principle of form." Unfortunately Hanslick meant something altogether different from the Herbartians by his use of the word form. Symmetry, merely acoustic relations, and the pleasure of the ear, did not constitute the musically beautiful for him. Mathematics were in his view useless in the Aesthetic of music. "Sonorous forms are not empty, but perfectly full; they cannot be compared to simple lines enclosing a space; they are the spirit, which takes form, making its own bodily configuration. Music is more of a picture than is an arabesque; but it is a picture of which the subject is inexpressible in words, nor is it to be enclosed in a precise concept. In music, there is a meaning and a connexion, but of a specially musical nature: it is a language which we speak and understand, but which it is impossible to translate." Hanslick admits that music, if it do not render the quality of sentiments, renders their tone or dynamic side; it renders adjectives, if it fail to render substantives; if not "murmuring tenderness" or "impetuous courage," at any rate the "murmuring" and the "impetuous."