24 
Colorado Experiment Station 
The next sample is a ground-water from a drained, cultivated 
field. The draining was effected at this place by an open ditch and as 
the water plane had fallen below the bottom of the ditch there was 
no other than ground-water to be obtained. This residue was also 
prepared in the field and the total solids are not given. 
ground-water, dibbers, mosca 
Analytical Results Combined 
Percent 
Percent 
Silicic acid . 
9.591 
Calcic sulfate. 
25.312 
Sulfuric acid . 
22.588 
Magnesic sulfate . 
11.589 
Carbonic acid. 
11.790 
Magnesic carbonate .... 
1.332 
Chlorin. 
5.018 
Potassic carbonate .... 
11.857 
Calcic oxid . 
10.429 
Sodic carbonate. 
* 17.661 
Magnesic oxid . 
4.512 
Sodic chlorid . 
8.281 
Potassic oxid . 
8.085 
Sodic silicate . 
16.240 
Sodic oxid . 
22.965 
Ferric and Alum, oxids. 
0.542 
Ferric and Alum, oxids. 
0.542 
Manganic oxid (br). 
0.054 
Manganic oxid (br). 
0.054 
Excess silicic acid. 
1.584 
Ignition . 
(5.548) 
Ignition. 
(5.548) 
Sum . 
101.131 
Total . 
100.000 
Oxygen equivalent to 
chlorin . 
1.131 
Total . 
100.000 
ALKALIS 
(These two samples of 
effloresced 
alkalis were collected 4 miles 
south and 
5 miles west of Hooper.) 
NW. 14 sec. 23, T. 40 N., 
, R. 9 E. 
SE. 14 sec. 16, T. 40 N., 
R 9 E. 
Percent 
Percent 
Silicic acid. 
0.200 
Silicic acid . 
0.427 
Sulfuric acid . 
51.436 
Sulfuric acid . 
52.175 
Chlorin ... 
3 463 
Carbonic acid. 
0.992 
Nitric acid . 
Present 
Chlorin . 
2.712 
Calcic oxid . 
3.300 
Calcic oxid . 
0.223 
Magnesic oxid . 
0.522 
Magnesic oxid. 
Trace 
Potassic oxid . 
2.831 
Potassic oxid . 
1.164 
Sodic oxid . 
35.800 
Sodic oxid . 
41.282 
Ignition . 
3.228 
Ferric and Alum, oxids. 
0.135 
Ignition . 
(1.530) 
Sum*. 
100.780 
Oxygen equivalent to 
Sum . 
100.620 
chlorin .., . 
.780 
Oxygen quivalent to 
chlorin . 
.620 
Total .... 
100.000 
Total. 
100.000 
