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Chap. IX.]
Fugue.
157

which sometimes in this case is an additional voice, as in fugue 20 of the 'Forty-Eight,' bars 83 to 87.

330. A few general principles will conclude this part of our subject. We have already (§ 321) spoken of the necessity of continuity in fugal writing. This necessity will be best shown by quoting a passage from Mozart's 'Musical Joke,' written as a burlesque of unskilful composers. This work is full of the most ludicrous mistakes in composition, intentionally introduced. Consecutives, passing notes quitted by leap, and similar atrocities, abound in it, but treated so skilfully that the joke is always perceptible. In the finale, Mozart introduces a little bit of fugue, thus—

Mozart. 'Ein Musikalischer Spass.
#(set-global-staff-size 19)
\header { tagline = ##f }
\score { \new ChoirStaff << \override Score.BarNumber #'break-visibility = #'#(#f #f #f) \override Score.Rest #'style = #'classical 
  \new Staff \with { instrumentName = \markup { \caps "Violino" 1mo. } } \relative c'' { \time 2/4 \key f \major R2*12 c2 e d8 f e d |
    c4 r a' a8 a | a4 a bes4.(\trill a16 b) | a4 r }
  \new Staff \with { instrumentName = \markup { \caps "Violino" 2do. } } \relative f' { \key f \major
    R2*8 f2 a g8 bes a g | f4 r | R2 c' ~ c4 b | c4 r |
    f f8 f f4 f f( e) f r }
  \new Staff \with { instrumentName = \markup \caps "Viola." } \relative c' { \clef alto \key f \major
    R2*4 c2 e d8 f e d | c4 r R2 f ~ f4 e f r R2 r4 a8 g | f4 g |
    e c c' c8 c | c4 c | d c c r }
  \new Staff \with { instrumentName = \markup \caps "Basso" } \relative f { \clef bass \key f \major
    f2 a g8 bes a g | f4 r R2 c' ~ c4 b | c r R2 r4 d8 c |
    bes4 c a f | R2*4 f2 a g8 bes a g | f4 r } >>
\layout { indent = 2.0\cm } }


The student will see that there is here a subject, a countersubject, and a regular exposition; and yet how ludicrous the