DIVIDE SOUTH OF DENVER 
Water 
Soluble and insoluble silica 
Potash 
Soda 
Lime 
Magnesia 
Iron Sesquioxide 
Alumina 
Phosphoric acid 
Sulphuric acid 
Carbonic acid 
Volatile and organic matter 
Chlorine 
Total 
* Containing nitrogen 
No. 14 
Doug- 
las 
County 
No. 16 
Elbert 
County 
1.42 
1.34 
82.12 
87.04 
0.37 
0.4ft 
0.51 
0.9ft 
0.24 
0.12. 
0.28 
0.42, 
2.54 
1.54 
8.34 
3.8ft 
0.03 
0.01 
0.20 
1.19 
0.02 
0.48 
3.10 
2.66 
0.07 
0.04 
99.24 
100.06 
0.13 
0.12 
ARKANSAS VALLEY. 
' 
No. 38 
Otero 
County 
No. 27 
Las 
Ani- 
mas 
County 
No. 42 
Prow- 
ers 
County 
1.55 
1.66 
2.65 
Soluble and insoluble silica 
83.26 
83.04 
78.00 
Potash 
0.91 
0.25 
1.09 
Soda 
0.52 
0.11 
0.54 
1.76 
1.55 
1.44 
Magnesia 
1.06 
0.11 
0.79 
Iron sesquioxide 
2.38 
2.93 
2.78 
Alumina 
4.45 
4.70 
5.94 
Phosphoric acid 
0.14 
0.90 
0.09 
Sulphuric acid 
0.50 
0.45 
0.60 
Carbonic 
1.15 
1.01 
Volatile and organic matter * 
3.25 
3.70 
5.79 
Chlorine 
0.09 
0.04 
0.03 
Total 
100.12 
100.45 
100.84 
* Containing nitrogen 
0.12 
0.06 
0.13 

