ACCENT AND REGNANT HARMONY 163 



2, 4, 8 and 16, namely, groups of two beats, and of 

 2, 4, 8 and 16 measures. All these numbers reappear 

 in the potential divisions and subdivisions of one or 

 both of the subrhythmic periods or beats as fol- 

 lows : — 



2 



r r i; ; I :? :5 II ^ I e^ 



Thus we observe on one hand the expansion, on 

 the other the division and subdivision of the sub- 

 rhythm, the latter being illustrative of what I have 

 just called the play of rhythm upon the subrhythm. 

 This play of rhythmic thought upon the subrhythmic 

 periods is further illustrated by the following list of 

 rhythms potential in a single period of the subrhythm. 



1. r 



y 



Students after working out this list resulting from 

 the division of a quarter-note will find it profitable 

 to work out other lists headed by notes of other 

 denominations, as ^ , T , J . Each of the four result- 



