37/42 Fragment of Schubert.] The first, second, and third of these cadences is made upon the tonic harmony, on the accent of each successive fourth measure. But they are only _semicadences_, as the melody (uppermost part) rests upon the Third of the chord, _c_, instead of the keynote; this substitution of _c_ for _a-flat_ is sufficient to frustrate the perfect cadence and diminish it to a transient interruption. The final cadence is perfect, however, because there the uppermost tone _is_ the keynote. |