FISHER: RIVER TERRACES. 
41 
islands and may be called the partition process. The result is the 
partition plain, likewise sloping toward the river, but undulating, with 
elevations representing the island walls which successively parted the 
river, and with intervening channels representing the abandoned 
courses of the river. And furthermore, it may be said, in considera¬ 
tion of the four processes which account for the lateral swinging of a 
river, that while the short-cut and the cut-off processes stop deposi¬ 
tion at certain places to allow it to begin elsewhere, the other two 
processes are constructive, depositing the meander-built plain and 
the partition plain. The meander-built plains have long been recog¬ 
nized as the ordinary flood plains, although many so classified are in 
reality undulating partition plains. The partition plains are of fre¬ 
quent occurrence and are typically represented along our New England 
rivers. Doubtless every meandering river is swinging in some portion 
of its course by the partition process. 
Wellesley, Mass., 1906 . 
