ECONOMICAL GEOLOGY. 
173 
Potash, 0-07 
Soda, 0.00 
Phosphoric Acid, 0.13 
Sulphuric Acid, O.0S 
Chlorine, trace 
Organic Matter, 13.00 
Water, 4.80 
Number 13 is a sample from a newly cleared swamp on the lands of 
the Rev. Mr. Carrow. The soil is of a gray color, and lumpy ; the 
growth, tupelo, ash, maple, poplar and bay ; a good corn soil. 
Big Sioamp, Robeson County , and Eagles' Island , Brunswick County. 
14 
15 
16 
Silica, 
. 52.20 
32.36 
62.22 
Alumina and Oxide of Iron, . . 
. 6.09 
4.92 
20.35 
Lime, 
. 1.16 
0.56 
1.54 
Magnesia, 
. 0.55 
trace 
0 23 
Potash, 
0.60 
0.96 
0.46 
Soda, 
.26 
0.00 
Phosphoric Acid, 
. 0.34. 
0.45 
trace 
Sulphuric Acid, 
0.65 
1.30 
0.23 
Organic Matter and Water, 
38.41 
59.19 
12.43 
Number 14 is a sample of black, 
boggy, soft 
soil, 5 to 
10 feet deep, 
from under the railroad bridge, Big Swamp. There is a scattered growth 
of tupelo and cypress, with a few small ash and maple trees between. It 
contains in abundance all the elements of the richest soil. 
Number 15 is from Eagles’ Island, opposite Wilmington ; the growth, 
cypress, tupelo, &c., with abundance of canes. It is a famous rice soil, — 
such as, when cleared and ditched, was estimated at one hundred dollars 
per acre before the war. 
No. 16 is a sample of the same soil from a field just below, of Mr. 
Northrop, which has been in cultivation for about one hundred years in 
rice. It is ash-colored and of close texture, and now produces well, 
grass, clover aud garden vegetables, and is still a very strong soil, needing 
only phosphoric acid. 
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