ACCENT AND REGNANT HARMONY 



127 



1 3 /) 3 5 



a 



g) 



5 1 



^m 



5 1 



^ 



w 



i 



IV 



t 



At N.B. in both above groups of examples we 

 again encounter la 9 playing the part of a bytone 

 during the regnancy of the harmony of which it is 

 a component. Attention is called to the fact that 

 except at N.B. the form of all the above regnant 

 harmonies is that of a consonance. Here we observe 

 the general truth that the efficient accent everywhere 

 makes for the stable equilibrium of consonance except 

 in cases like N.B. where specific relations of specific 

 tones cause the regnant harmony to take the form 

 of a dissonance. The above examples illustrate 

 another series of facts. First, we observe that in 

 certain relations a regnant consonance is generated 

 by the efficient accent on a single component as indi- 

 cated by the tones reporting I, V and IV; second, a 

 regnant dissonance (see N.B.) is not generated unless 

 at least two of its components occupy successive 

 rhythm-periods. We will first take up the conso- 

 nances I, V, IV. All the components of I possess 

 this individual power to generate its regnancy, do 

 by itself, mi when preceded by IV or V, sol when 

 preceded by IV, as shown below at a). Two com- 

 ponents of V have this individual power; they are re 

 and ti; see below at b). Two components of IV 

 have this individual power, namely, la and /a; see 

 below at c). 



