GEOLOGY BETWEEN APALACHICOLA AND OCKLOCKNEE RIVERS. 1 3 
perature at Apalachicola are based on records as contained in the 
report on the soils of Franklin county by the Bureau of Soils, U. 
S.. Department of Agriculture.* 
The annual mean temperature at Tallahassee, in Leon county, 
is 67 degrees Fahrenheit. The mean for the four seasons of the. 
year is as follows: Winter, 53; Spring, 67; Summer, 80; Fall, 68. 
The absolute maximum summer heat recorded at this station is 97 
degrees F. The minimum winter temperature recorded is 12 de- 
grees F. 
The annual mean rainfall at Tallahassee is 58.2 inches. This 
is distributed throughout the year as follows: January, 3.5 inches; 
February, 4.8 inches; March, 5.9 inches; April, 2.7 inches; May, 
3.6 inches; June, 6.8 inches; July, 8 inches; August, 7.1 inches; 
September, 5.1 inches; October, 3.7 inches; November, 2.9 inches; 
December, 4.1 inches. 
The annual mean temperature at Apalachicola, in Franklin 
county, is 69 degrees Fahrenheit. The mean for the four sea- 
sons of the year is as follows: Winter, 55; Spring, 69; Summer, 
81 ; Fall, 71. The. absolute maximum summer heat recorded at 
this station is 100 degrees F. The minimum temperature recorded 
is 20 degrees F. 
The annual mean rainfall at Apalachicola is 56.1 inches. This 
is distributed throughout the year as follows: January, 4.1 inches; 
February, 2.3 inches; March, 2 inches; April, 2.8 inches; May, 4.9 
inches; June, 3.3 inches; July, 6.7 inches; August, 9.3 inches; Sep- 
tember, 10 inches; October, 2.8 inches; November, 2.6 inches; De- 
cember, 5.3 inches. 
VEGETATION. 
The prevailing type of vegetation for this area as a whole is 
the open forests of long-leaf pine. In the more sandy and better 
drained areas of the long-leaf pine forests there is usually an un- 
dergrowth of black-jack oaks and other deciduous trees. How- 
ever, this area may be broadly separated into three divisions : The 
rolling uplands of the northern part; the belt of long-leaf pine 
forests, and the alluvial swamp vegetation along the Apalachicola 
river. 
* Soil survey of Franklin County, Florida, p. 8, U. S. Department of 
Agriculture, Advance Sheet, Field Operations of the Bureau of Soils, 1915. 
