CHORDS IN THE LIGHT OF THEIR ORIGIN 243 



I next present the two original types of ninth- 

 chords in a series of ground-forms very commonly em- 

 ployed, especially in instrumental music. It will be 

 observed in these illustrations that while the chord- 

 root is retained throughout, the upper four tones ap- 

 pear successively in four positions first close, then open. 



Large Ninth-Chord 



V9. 



^maU. Ninth-Chord 



All other types of ninth-chords are either modifica- 

 tions of the original two or compound chords. 



51. Simple and Compound Chords Defined 



1. A simple chord is a combination of components 

 of a single harmony. 



2. A compound chord is a combination of compo- 

 nents of two or more harmonies. 



In the above summary all the chords are simple and 

 all the types there presented are types of simple chords. 

 Their sole guide having been harmonic feeling and 



