ECONOMICAL GEOLOGY. 177 
shows a good soil except as to phosphoric and sulphuric acid. No. 27 is 
the sub-soil of the last, at the depth of 3 feet; and in it one of the 
defects of the soil proper is abundantly supplied. 28 is a sample of the flat, 
gray, alluvial wheat lands north of Albemarle sound, obtained 1 mile east 
of Woodville, Perquimans county. The analysis explains the fertility of 
these noted soils. 29 is from the u pine flats” of Johnston county; the 
sample is from Selma, and was obtained in the new grounds of Mr. Noble ; 
it is of a light gray color, presenting the appearance of a clay, very 
lumpy, and disposed to adhere in angular masses, when plowed or spaded ; 
the principal growth is long-leaf pine, with small oaks, gum and other 
semi-swamp vegetation. It is evidently a soil ot good quality. Flats ot 
this description are very extensive, in many eastern counties. 
O allberry Soils - 
'30 
D 
E 
E 
•Silica,. 
. .90. S3 
88.40 
70.50 
S2.40 
Alumina and Oxide of Iron, 
. . 1.24 
2.92 
0.76 
8.70 
Dime, 
. . 0.26 
0.01 
0.01 
0.02 
Magnesia....... 
. . 0.08 
0.01 
trace 
0.01 
Potash, ......... 
. . 1.46 
trace 
trace 
Soda, 
Ol 
CO 
o 
trace 
trace 
Phosphoric Acid,.. ... 
Sulphuric Acid, 
. . 0.-09 
. . 0.27 
0.00 
0.15 
Organic Matter, 
j- 5.45 
* ) 
4.20 
25.20 
3.35 
Water, 
3.09 
2.70 
6.00 
Number 3b is from a gall berry flat of several miles extent in the upper 
part of New Hanover -county, one mile north of Burgaw Savannah. It is 
•covered with a various shrubby thicket, somewhat brambly, almost the 
only tree being a stunted -short leaf pine, arad the growth of this rather 
sparse. It will be observed that the analysis shows about 95 per cent, of 
sand, (leaving out the organic matter and water), and an insignificant 
amount of alumina and iron.; the other ingredients being in fair propor- 
tion .; it is a much better soil than that of most gall berry lands. The 
next analysis, D, is that of a sample from Sampson county, by Dr. Em- 
mons, and shows a hopelessly poor soil. There is a considerable quantity 
of such land in this and in Duplin and Johnston counties. The color is 
brownish gray and drab. Similar to this and even more deficient, is the 
next soil, represented by analysis E. The specimen is from the great 
Dover Swamp, and according to Dr. Emmons, from whom the analysis is 
