They are cast in a nobler mould, their distinguishing characteristics being grace and delicacy, and they are equally capable of expressing merry drollery and strong, even painful, emotion. Haydn's minuets are the product of a laughter-loving national life, Mozart's give the tone of good society. Especially well-defined in character are the minuets of the D minor and C major quartets--the former bold and defiant, the latter fresh and vigorous. Delicate detail in the disposition of the parts is common to almost all of them, keeping the interest tense and high, and there are some striking peculiarities of rhythmical construction. Among such we may notice the juxtaposition of groups of eight and ten bars, so that two bars are either played prematurely, as in the minuet of the first quartet, or inserted, as in the trio of the B flat major quartet.[18] The ten-bar group in the minuet of the D minor quartet is more complicated, because more intimately blended, and still more so is the rhythm of the minuet in the fourth quartet, where the detached unequal groups are curiously interlaced.[19] Very characteristic is also the sharp contrast between minuet and trio--as, for instance, the almost harshly passionate minor trios of the first and last quartets, and the still more striking major trio of the D minor quartet, light and glittering, like a smile in the midst of tears. The finales have more meaning and emphasis than has hitherto been the case in Mozart's instrumental compositions. Three of them are in rondo form (those of the B flat, E flat, and C major quartet), quick, easy-flowing movements, rich in graceful motifs and interesting features in the working-out. The merriment in them is tempered by 1 a deeper vein of humour, and we are sometimes startled by a display of pathos, as in the finale of the C major quartet. The more cheerful passages are distinctly German in tone; and echoes of the "Zauberflote" may be heard in many of the melodies and turns of expression. {MOZART'S INSTRUMENTAL MUSIC.} (14) The last movement of the G major quartet is written in strict form, and highly interesting by reason of the elegance of its counterpoint; the finale of the A major quartet is freer and easier, but nevertheless polyphonic in treatment.[20] The D minor quartet concludes with variations, the original and long-drawn theme having the rhythmical and sharply accented harmonic form of the siciliana. It is in imitation of a national song, and is sometimes like a slow gigue, sometimes like a pastorale. The rhythm of the 6-8 time is somewhat peculiar, in that the first of three quavers is dotted throughout; the tone is soft and tender. There is a very similar siciliana in Gluck's ballet "Don Juan" (No. 2), showing how marked the typical character is.[21] The variations, which are as charming from their grace and delicacy of form as from their singular mixture of melancholy and mirth, bring this wonderful quartet to a close in a very original manner.