By Margaret Brandman. 

-Review of four-note chords from Set Seven.
-Minor 6th and Half-Diminished 7th chords, Altered 7th chords: Dom7#5, Dom7 b5, Maj7#5, Major 7b5, Dom7sus4, Minor#7 chord.
-Chromatic Chords in Classical Harmony: Neapolitan 6th, Italian 6th, German 6th, French 6th. These sounds are heard in examples from the classics.