176 
GEOLOGY OF NORTH CAROLINA, 
feet. The analysis indicates a valuable fertilizer, for which purpose it 
has been used to some extent. Indeed,, all of these marsh sediments, of 
which there is a great and increasing area, scattered along all the lower 
reaches of these wide rivers, and on the shores of the sounds and bays,, 
must one day become a most important source of manure to all' the coast 
region, which is everywhere penetrated by bayous and other navigable- 
water-ways, for their transportation and distribution. 
Semi Swamps and Alluvions , in several Counties. 
23 
24 
25 
26 
27 
28 
29 
Silica, Insoluble,. . 
. 85.15 \ 
94.05 
75.95 
81.70 
87.79 
81.25 
90.13 
“ Soluble,.... 
. 1.57 \ 
0.40 
0.00 
6.15 
3.67 
Alumina, 
j- 5.02 
1.15 
5.15 
5.85 ) 
6.58 
3 44 
1.4S 
Oxide of Iron,. . . . 
0.71 
9.60 
0.07 [ 
1.85 
0.70- 
Lime, 
1.67 
0.26 
0.59 
1.96 
0.73 
0.17 
0.45 
Magnesia, 
0.38 
0.09 
0.29 
0.62 
0.43 
0.25 
0.05 
Potash, 
trace 
0 1 . 16 
0.08- 
0.72 
0.41 
0.11 
0.13 
Soda, 
, .45 
0.84 
0.57 
Phosphoric Acid,.. 
. 0.02 
trace- 
0.00 
0.06 
0.05 
0.02 
Sulphuric Acid,... 
0.03 
0.15 
0.08 
trace 
trace 
trace 
trace 
Chlorine, 
.01 
trace 
trace 
trace 
Organic matter,. . . 
Water, 
4.41 ) 
1.32 j 
3.25 
8.40 
7.40 
1.45 
1.44 
0.55 
5.50 
1.40 
2.34 
0.50 
Sulphide of Iron,. , 
. 0.24 
1.08 
JN umber 23 is a sandy and somewhat gravelly loam of Coin mb us county, 
of a gray color, flat, heavily timbered; growth, willow oak, maple, 
ash sweet and black gum and poplar. It is found near Whiteville, farm 
of Y. Y. Richardson, and represents a large area of land in the eastern 
counties, which can be identified by the above characters. It contains all 
the elements of a good soil, but potash in too small proportion. No. 24 
is from the sloping margin of a white oak flat, one mile east of Rocky Point, 
in New Hanover ; it is gravelly and sandy, and produces fair corn crops. 
25 is from the flat itself just mentioned, of which the characteristic 
growth is white oak, but there are also black gum, hickory, horn-beam, 
ashe, buckeye, may apple. It is shown by the analysis to be a strong 
soil, with all the elements of fertility in abundance, except pkorphorie 
acid. 26 is from a gray alluvial tract which stretches for a mile or two 
south of the Neuse, near Goldsboro, a sort of sandy second bottom ; the 
growth is willow oak, sweet gum, maple, white bay, &c. The analysis 
