ECONOMICAL GEOLOGY. 
171 
a half mile and less in width to above a mile. The surface rises towards 
the interior and is covered by a soil, if it may be called such, represented 
by No. 9 which is 2 to 3 feet deep, and upwards (to 8 or 10, according to 
report), and lies on a bed of white sea-sand. It consists of a loose open 
mass of half decayed woody matter, of a brown color, and is in tact a su- 
perficial, uncompressed lignite ; for it will be observed that the analysis 
includes nearly 10 per cent, of water, so that the dry substance would 
give but 3£ per cent, of inorganic matter, not more than would be ac- 
counted for by the ash of the woody matter. The growth is a dense 
thicket of spindling shrubs with small scattered maples and bays. Dr. 
Emmons reports as the result of an analysis by him, only 3 per cent, of 
organic matter. This is of course worthless as a soil, and unimprova- 
ble. B is a sample analyzed by Dr. Emmons from another portion ot 
the swamp border, where the soil is 3 to 5 feet deep, black and peaty and 
covered with briars and bushes and brambles. This soil is reported to 
have given a remarkable yield of potatoes in an experiment made for the 
Literary Board. 
White Oak Swamp , Jones County. 
10 
C 
Silica Insoluble, 
61.71 
60.00 
“ Soluble, 
3.60 
10 
Alumina, 
3.33 
[- 11.03 
Oxide of Iron, 
0.30 
Lime, 
0.10 
1.50 
Magnesia, 
0.29 
0.30 
Potash, 
0.05 
0.01 
Soda, 
0.02 
0.02 
Phosphoric Acid, 
0.06 
0.31 
Sulphuric Acid, 
......... 0.21 
Chlorine, 
Organic Matter, 
22.80 
25.00 
Water, 
1.20 
2.71 
Number 10 is a sample of soil from Mr. E. L. Franke’s plantation on 
the southwest margin of the swamp. The growth is tupelo, poplar, ash, 
cypress, pine and bay. The soil is black, and 2 to 3 feet deep, increas- 
ing in depth inwards. This soil has proved very productive in corn, and 
the soils a little further but, on the very fringe of the swamp produce 
also fine cottoti. C. is an anylysis by Dr. Emmons of a sample from the 
