The minuet is almost invariably inserted between each andante and allegro, and therefore occurs two or three times in the symphony. The omission of all the other forms of dance music, so amply represented in the suite, is a proof that this form of instrumental music was not intended for practical use, at least in this juxtaposition. Variations were sometimes made in the character of the minuets by changes in the instrumentation, more especially in the trio. Several trios were frequently given to one minuet with appropriate instrumentation, making use of obbligato violins (185, 203, 204, 250, K.), flutes (204 K.), trumpets (250 K.), and sometimes the stringed instruments alone (100, 250, K.). A grand allegro in two parts, as a commencement, and an allegro or presto at the close, sometimes introduced by a short adagio, form the main substance of the serenade as well as of the symphony, and the movements are similarly treated. The slow movement between them is in its turn between two minuets (62 K.), and there are sometimes two slow movements, each with a minuet appertaining to them (99 K.), and characterised by varied instrumentation. As time went on, an allegro was inserted between the two slow movements, which, however, was rendered distinct from the two principal quick movements by its lighter colouring and tone; the instruments, too, are grouped with more diversity. For instance (185 K.), the oboe and horn are employed obbligato in the first andante and the {INSTRUMENTAL MUSIC.} (302) following allegro, and in the second andante flutes are combined with the stringed instruments.