Record of Geology of Texas, 1887 - 1896 . 
123 
Harrington^ H. H. 
ELEMENTS. 
No. I. 
No. II. 
Surface 
Subsoil. 
Surface 
Subsoil. 
Moisture 
' 2.30 
-3.22 
89.49 
•j 3.94 
0.44 
0.08 
Trace 
0.03 
0.06 
0.07 
1.77 
2.56 
91.09 
4.12 j- 
0.36 
0.15 
Trace 
0.03 
0.12 
0.16 
1.32 
4.60 
83.22 
5.82 
2.12 
0.555 
0.126 
1.02 
3.31 
85.91 
6.44 
1.70 
0.255 
0.197 
Volatile and organic matter 
Insoluble matter and sand 
Trnn oxide 
Alumina oxide 
fia.leinm oxide 
Magnesium oxide 
SnlpVinrie a.eid 
Phosphoric acid 
0.243 
0.48 
0.40 
0.44 
0.141 
0.44 
0.49 
0.187 
Potash 
Soda 
Carbon Dioxide 
“Both of these sia-mples represent the better types of soil in the East 
Texas belt of soils, and while the analysis cannot compare with that of the 
richer lands in the .State, it is very 'favorable, indeed.” 
* ^ * 45- * * * 
‘^The Black Prairie Belt . — There are four divisions of this with only 
slight variations : The first on the east, next to the timber belt, is distin- 
guished by the presence of sand in the soil — ^with occasional pure beds of 
sand — illustrated by the analysis of soil samples from Terrell and Pecan 
iG^ap. West of this strip comes the main black waxy area — characterized 
by a sulbstructure of light blue or yellow calcareous clay, called by resi- 
dents ‘soap s'tone’ and ‘joint clay,’ from its laminated structure. Small 
depressions in the surface of the soil, called ‘hog- wallows,’ are quite 
common. These are caused by the unequal drying and expansion of 
the calcareous clays in poorly drained places. Greenville, Terrell, Kauf- 
man and iCorsioana are situated near the dividing line between the above 
two divisions. Below iwill be found analyses of samples from Terrell, 
iPecan Gap, Forney, Belton and Manor — the three latter soils illustrating 
the main black waxy belt. 
