.

THE PERIOD-FORM.
PHRASE-ADDITION .-- The phrase is the structural basis of all musical composition.

By this is meant, not necessarily the single phrase, but the phrase in its collective sense.
The phrase is, after all, only a unit; and the requirements of Variety cannot be wholly satisfied by the mere development and extension of a single phrase, except it be for a certain limited section of the piece, or for a brief composition in small form (like Schumann, op.

68, No.

8).
The act of _addition_ does therefore enter into the processes of music-writing, as well as _extension_.