ACCENT AND REGNANT HARMONY 125 



new forms of consonance and dissonance, all of which 

 are minor, 



18. The operation of the principle of harmonic 

 genesis and regnant harmony, the efficient accent, 

 has now been exemplified. We shall resume these 

 subjects later on, but before dismissing them here 

 it may be well to pause and observe the operation 

 of this principle with greater scrutiny. We have 

 noted that alternating rhythm-periods make for 

 rhythmic equilibrium, that alternating tone-rhythmic 

 periods make for combined rhythmo - harmonic 

 equilibrium, in short, that the connection between 

 harmonic equilibrium and rhythmic equilibrium is 

 indissoluble, and that rhythm has transmuted chaos of 

 sound into perfect tone-equilibrium or harmony. The 

 shortest rhythm contains two periods. The shortest 

 melody contains two tones each occupying a rhythm 

 period, one light, one heavy. Thus the combined 

 form and equilibrium of composite rhythm and 

 harmony is conditioned by recurrence of these alter- 

 nating light and heavy periods. Let the following 

 wave-lines indicate these alternating periods, first, 

 in the order light-heavy; next, in the order heavy- 

 light, and let the repetition marks indicate recurrence. 



1 .\ light / heavy^ : 1 1 2. / heavy\ light /: 1 1 



r r r r 



The notes indicate respectively short-Zongr, long- 

 short; the dynamic =^ indicates the efficient accent. 

 Now sing each diatonic whole step and half step in 

 accordance with these two forms of rhythm and note 



