Trombone

Trombone (formerly called in England the "sackbut") is a musical instrument of the trumpet kind, consisting of bent tubes, one of which slides upon the other, and ending in a bell mouth. The instrument is held by one hand by means of a cross-piece, and the other hand manipulates the slide. The trombone is a "perfect instrument" - i.e. by means of the slide it produces a full chromatic sequence. Its varieties are treble, alto, tenor, and bass, and it is available both for orchestra and military band.