238 THE NATURE OF MUSIC 



monic root. But in the harmonic analysis of a con- 

 crete case we first name the type of a specific chord 

 and then proceed to describe the chord's specific rela- 

 tion which gives us the harmonic report we are in 

 search of. 



There are three triad-positions. In its first posi- 

 tion, the triad is named the ground-triad, the chord- 

 root being its lowest tone. In its second position 

 with the chord-third as lowest tone, the triad is named 

 the sixth-chord and may also be called the terce- 

 form. In its third position with the chord-fifth as 

 lowest tone, the triad is named the fourth-sixth chord 

 and may also be called the quint-form. The posi- 

 tions of triads are further distinguished as close and 

 oj>en : close when the components are in closest prox- 

 imity, as below at a), o'pen when the components are 

 spread apart as at 6). 



a) Close h) Open 





sr 



M /Q ,<3 IJ 



I la I| I la Is 



As everybody knows, all thorough-bass numbers 

 like 6 and | in our example indicate intervals as com- 

 puted from the lowest tone or bass. 



Seventh-Chords, We have thus far presented four, 

 two in major, two in minor. They are: — 



In Major In Minor 



N.B. N.B. N.B. 



