ECONOMICAL GEOLOGY. 
160 
Phosphoric Acid, 0.01 trace, 0.08 0.01 0.06 
Sulphuric Acid, 0.03 0.43 trace, 
Chlorine, 0.03 trace, 0.06 0.06 0.02 
Organic Matter, 9.60) iqrn 5.60 6.00 17.50 
Water, 2.10 j 9.00 3.00 2.30 
1. The first of the above analyses is that of a class of land called second 
swamp. The sample was obtained within half a mile of the village of 
Jackson which is situated on the river. The soil is dark to gray in color, 
and somewhat gravelly. It is flat and lower than the more sandy margin 
of the river; the growth is beech, maple, tupelo, &c. 
There is a large body of this second swamp land ; several cotton farms 
have been opened in it since the war, and the ordinary yield, without 
manure, is a bale to the acre. 
There is a large area also of open beech flats with much palmetto, 8 or 
10 miles N. W., on South creek, of which the soil does not differ much 
in appearance, nor probably greatly in quality, from the above ; it is more 
clayey. 
Number 2 is a light to dark gray soil, from the outer rim of Bear 
Creek swamp, 6 or 7 miles below Jackson ; ordinary swamp growth, 
tupelo, poplar, maple, ash, sweet gum and white bay. 3 is the subsoil of 
same at the depth of 2 feet, lighter colored and more sandy. 4 is still 
deeper, about 4 feet. 
Number 5 is the swamp soil proper, higher in level than the last, to- 
wards the centre of the swamp ; black, peaty, much fibre of wood half 
decayed ; about 2 feet deep to fine white sand ; covered with thick growth 
of short canes and shrubs, an occasional short leaf pine being the only 
tree. This represents a large body of the interior of this swamp; and 
the corresponding belt also of most of the great swamps of the region. 
Blount's GreeTc Swamp, Beaufort County. 
Silica, Insoluble, 
“ Soluble, 
6 
. .. 59.24 
... 3.86 
7 
55.46 ) 
1.26 j 
A 
77.50 
Alumina, 
Oxide of Iron, 
' *• J 13.78 
11.52 
6.90 
Lime, 
. . . 1.62 
2.60 
0.50 
Magnesia, 
. . . 1.08 
0.54 
0.10 
Potash, 
0.81 
0.02 
Soda, 
. . . 0.69 
0.52 
0.03 
Phosphoric Acid, 
trace 
0.40 
