TYPICAL SWAMP AREAS. sy 
ders the conditions of these swamp lands peculiar, and 
makes their study particularly interesting. In the vicinity 
of Bertig, Arkansas, there is an average fluctuation of 
SWAMP REGION 
OF THE. 
SAINT FRANCIS RIVER 
about twenty-four inches during the year, though this has 
been observed to reach as much as forty-four inches. In 
the spring when the water was some fifteen inches below 
