and more cheerful, but they are not altogether wanting in energetic expression of passion. The sharper characterisation made necessary by the division of the music among a greater number of instruments was only possible by means of the agitation and restless movement of the parts, even when the tone of the whole was quiet and contained. We find therefore various sharp or even harsh details giving zest to the whole--such, for instance, as the use of the minor ninth and the comparatively frequent successions of ninths in a circle of fifths; and the quintets have apparently been a mine of wealth to later composers, who have made exaggerated use of these dangerous stimulants. Greater freedom of motion stands in close connection with the better defined characterisation of the quintets. Polyphony is their vital element; the forms of counterpoint became more appropriate as the number of parts increased. The finales to the Quintets in D and E flat Major (573, 614, K.) showed that Mozart was able to make use of the very strictest forms upon occasion. Both movements begin in innocent light-heartedness, but severe musical combinations are developed out of the airy play of fancy; ideas which have only been, as it were, suggested are taken up and worked out, severe forms alternate with laxer ones--one leads to the other naturally and fluently, and sometimes they are both made use of at the same time. The disposition of the parts is free, without any preconceived or definitive form, and its many delicate details of taste and originality give an individual charm to each separate part. The homophonie style of composition is not altogether disregarded for the polyphonic, but it is never made the determining element. Even a melody such as the second subject of the first movement of the G minor quintet, complete in itself as any melody can be, is made use of as a motif for polyphonic development. The freest and most elastic treatment of form is that of the last movements. The other movements are fully developed, and sometimes carried out at great length, but the main features are always distinct and well preserved; the outline of the finales is less firm, and capable of a lighter and more varied treatment. {MOZART'S INSTRUMENTAL MUSIC.} (24)