248 



THE NATURE OF MUSIC 



compound chord and represents the major mediant- 

 triad the symbol of which is iii. The corresponding 

 biad in minor is a compound of a of / and 3 of F and 

 represents the minor mediant-triad known by the 

 symbol HJ[, Thus the major mediant-triad is a com- 

 pound of the harmonies I and V: the minor mediant- 

 triad is a compound of the harmonies I and V, I next 

 present the full triads with harmonic report of each 

 component. 



The three tones in these triads are known as the 

 chord-root, chord-third, chord-fifth respectively. The 

 middle tone (chord-third) in each of the triads simul- 

 taneously reports itself as a component of two har- 

 monies. A tone presenting such a double report is 

 named a double harmonic. Every compound chord 

 contains at least one double harmonic. Primary 

 chords are simple : secondary chords, like those above, 

 are compound. Therefore secondary chords are com- 

 pounds of primary or simple chords. Before and after 

 the simple chords of which they are compounds, the 

 two above triads appear in third-relations and are 

 heard as compound in accordance with the above 

 analysis. They are given below in these third-rela- 

 tions and are marked N.B. 



