The symphonic poems of Liszt, and those who follow strictly his example, are not divided into a number of distinct, separate movements like the symphony, but the changes of tempo or movement follow each other without break. Liszt made a prominent use of the Leitmotiv (leading-motive) principle, which he adopted from Wagner. It will be observed that the result, however, is wholly different, for Wagner in the course of one of his music-dramas uses a variety of dissimilar and strongly contrasted leading motives. His music, therefore, is based on the _polythematic_ principle, whereas the symphonic poems of Liszt are generally _monothematic_. The leading-motive is one thing in connection with the drama, another as employed in the concert-room. In the latter case it serves the same purpose that it has in the fugues of Bach (mostly founded on one theme) or in certain movements of symphonies. It is simply the working up on the imitative principle of a leading idea, which is modified, enlarged, curtailed and varied according to the conditions of counterpoint, harmony, rhythm, etc. So far as thematic imitation is concerned, the symphonic poem is an offshoot of the symphony or overture. What the symphonic poem has gained in conciseness of form it has lost in grandeur and impressiveness. The symphonic poem relates to the symphony as a noble and beautiful church does to a grand, awe-inspiring cathedral. In treating his grandest subjects—“The Divine Comedy” of Dante, and “Faust” of Goethe—Liszt returned to the general outlines of the symphony. [Illustration: ALBERT LORTZING (See page 595.) ] The symphonic poem is a welcome addition to modern music, but it is capable of further development both in form and character. There is no reason why the polythematic principle should not be applied to it, or why the movements should not be extended. In the future the symphonic poem may rival the symphony, but is not likely to supplant it. The symphony has undergone many changes of detail since Beethoven, and in the course of time it is probable that new forms of instrumental music will be invented, but it will be difficult to reach as high an ideal as that attained by the great masters of the symphony. In grandeur, emotional intensity, thematic variety, contrast of movements, the symphonies of Beethoven, Schubert, Schumann, Brahms and others stand on a higher plane than the symphonic poems of Liszt, Saint-Saëns and many less conspicuous composers who have cultivated this form.