36 Colorado Experiment Station 
ANALYSES OF THE RESIDUES FROM BROWN ARTESIAN WATERS CONTD. 
Mosca Town 
Mosca Mill 
Hooper Mill 
Well 
Well 
Well* 
Percent 
Percent 
Percent 
Silicic acid . 
5.537 
4.821 
4.160 
Sulfuric acid . 
0.342 
0.046 
0.063 
Phosphoric acid . 
0.247 
0.148 
0.168 
Carbonic acid . 
... 37.603 
37.104 
37.365 
Chlorin . 
0.425 
0.148 
0.470 
Potassic oxid . 
0.982 
1.148 
1.433 
Sodic oxid . 
... 53.077 
53.665 
54.045 
Calcic oxid .. 
0.413 
0.651 
0.282 
Magnesic oxid . 
0.153 
0.391 
0.219 
Ferric oxid . 
0.086 | 
0.031 
0.039 
Aluminic oxid . 
Manganic oxid (br). 
0.121 j 
0.086 
0.054 
0.048 
Lithium, Todin, Bromin, Titanic 
Traces 
acid and Boric acid. 
. . . . Traces 
Traces 
Carbon or Organic matter. 
_ 0.365 
(1.721) 
(1.814) 
Sum . 
_ 99.437 
100.064 
100.106 
Oxygen equivalent to chlorin. 
.096 
0.064 
0.106 
Total . 
. ... 99.341 
100.000 
100.000 
Total solids, grains per imp. 
gal. .78.7 
108.9 
104.3 
The sanitary analyses of the Mosca town well gave us a great 
deal of trouble. The results were as follows: 
Total solids. 
Chlorin . 
Nitrogen as nitrates . . 
Nitrogen as nitrites... 
Saline ammonia. 
Albuminoidal Ammonia 
Oxygen consumed. 
1124.2857 
6.9310 
0.2000 
0.0010 
2.1300 
0.1750 
28.1000 
The oxygen consumed was reduced from 28 to 10 parts per mil¬ 
lion by treating the water with calcic hydrate. The first two samples 
were taken in "1897 and the last three in 1907 and the analytical work 
was done by two different analysts, and yet the analyses are very 
nearly alike. The waters are essentially solutions of sodic carbonate 
colored by humus. The taste and odor of hydrogen sulfide is more or 
less strongly perceptible in many of the artesian waters, both white 
and brown. Some of the wells emit a comubstible gassuch wells do 
not furnish the most strongly colored waters. The waters from the 
deeper flows are richer in sodic carbonate, but not so strongly coloied 
as those from a depth of about 500 feet. A comparison of the white 
and brown waters shows some marked differences. The white waters 
carry small amounts of total solids, 20.7 grains per imperial gallon 
beinjgi the maximum that I have found in the white waters, and there 
was some danger of pollution in this case, as it was from an uncased 
well in Alamosa. The well is now closed. The minimum that I have 
found in any tinted water is 25 grains per gallon in water from the 
*These analyses appeared in the American Journal Sc. Vol. XXVII, p. 315. 
