ig. EAST FLORIDA FLATWOODS. 327 



sand." (In the ''Gainesville area," which is mostly in regions lo and 

 17, this soil is said to cover 11.5%, or 35,840 acres; in Bradford 

 County, which is about nine-tenths fiatwoods, 39.3%; ^nd i" the 

 "Jacksonville area," which is all flatwoods, 46.5%- And some of 

 the other soils which cover large parts of these areas differ from this 

 one but slightly). The following mechanical analyses of this soil 

 and its subsoil are taken from the Gainesville and Jacksonville re- 

 ports (none being given in the Bradford County report). 



1. One mile northwest of Paradise, Alachua Co.* A gray medium sand, 

 o to 20 inches. 



2. Subsoil of same. A brown medium sand, 20 to 36 inches. 



3. Average of four localities in Duval County. Soil (depth not given). 



4. Subsoil of same. Depth not given. 



5. Lower subsoil, average of two localities. Depth not given. 



Mechanical Analyses of "Portsmouth Fine Sand/' East Florida Flatwoods 



12345 



Fine gravel (2-1 mm.) o-4 0.8 o o 



Coarse sand (1-.5 mm.) 10.4 iO-3 0.8 0.5 0.4 



Medium sand (.5-.25 mm.) 23.1 22.5 2.4 2.5 2.1 



Fine sand (.25-.1 mm.) 49.8 46.8 84.9 83.7 83.8 



Very fine sand (.1-.05 mm.) 12.5 13.1 4.0 5-9 57 



Silt (.05-.005 mm.) 2.4 2.5 4.9 3-8 4-i 



Clay (.005-0 mm.) i.i 37 2.7 3.5 3.3 



Total 997 997 997 99-9 99-4 



If these are all typical sampled the soil is evidently of coarser 

 texture in Alachua County than in Duval; but what significance, if 

 any, is to be attached to this is not at present evident. 



A chemical analysis of soil from the same region is given in 

 the Tenth Census, vol. 6, p. 202. The sample represents 10 inches 

 depth of "second-class pine land," with long-leaf pine and wire- 

 grass, 5 miles north of Lake City, Columbia County; collected by 

 Dr. Eugene A. Smith in the summer of 1880 and analyzed under 

 his direction at the University of Alabama by John B. Durrett, by 

 the acid digestion method mentioned on preceding pages. 



*In the Gainesville report as published (page 20 of the advance sheets or 

 page 284 of the whole volume) this was inadvertently placed in a table headed 

 'Gainesville sand." 



