COLORADO IRRIGATION WATERS AND THEIR CHANGES. 33 
TABLE XX.—ANALYSIS OF WELL A, JUNE 27, 1898.* 
Grs. 
Grs. 
Analytical 
Per 
Imp. 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Combined. 
Cent. 
Gal. 
Silicic Acid___ 
0.649 
1.399 
Calcic Sulfate_ 
35.648 
76.857 
Sulfuric Acid... ... 
46.854 
100.017 
Magnesic Sulfate._ 
28.750 
61.985 
Carbonic Acid_ . 
3.099 
6.681 
Potassic Sulfate_ 
0.670 
1.444 
Chlorin ___ 
6.115 
13.183 
Sodic Sulfate.. . 
11.393 
24.563 
Sodic Oxid _ 
15.289 
32.963 
Sodic Chlorid _ _ 
10.091 
21.756 
Potassic Oxid_ 
0.364 
0.785 
Sodic Carbonate . 
7.472 
16.110 
Calcic Oxid_ 
14.685 
31.661 
Sodic Silicate __ __ 
1.149 
2.477 
Magnesic Oxid_ 
9.581 
20.657 
Ferric and Al. Oxids 
0.040 
0.086 
Ferric and Al.Oxids 
0.040 
0.086 
Manganic Oxid_ 
0.060 
0.129 
Manganic Oxid_ 
0.060 
0.129 
Ignition_ _ 
4.754 
10.249 
Ignition 
4.754 
10.249 
— 
Sum . ... 
100.027 
215.656 
Sum__ 
101.490 
218.810 
Excess Silicic Acid 
0.083 
0.179 
Oxygen Equiv. to 
Chlorin 
. 1.378 
2.971 
Total_ 
100.110 
215.835 
Total_100.112 215.839 
Total solids, 215.6 grains per imperial gallon. 
* Before irrigation. 
TABLE XXI.-ANALYSIS OF WATER OF WELL A, JULY 11,1898.* 
Grs. 
Grs. 
Analytical 
Per 
Imp. 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Combined. 
Cent. 
Gal. 
Silicic Acid_ 
_ 0.265 
1.092 
Calcic Sulfate_ 
26,267 
108.168 
Sulfuric Acid_ 
. 46.461 
191.326 
Magnesic Sulfate_ 
31.016 127.723 
Carbonic Acid_ 
_ 1.984 
8.172 
Potassic Sulfate_ 
0.162 
0.668 
Chlorin 
_ 6.808 
28.033 
Sodic Sulfate 
18.217 
75.018 
Sodic Oxid_ 
_ 16.904 
69.612 
Sodic Chlorid_ 
11.230 
46.246 
Potassic Oxid 
. 0.088 
0.361 
Sodic Carbonate.. 
4.781 
19.687 
Calcic Oxid 
_ 10.824 
44.572 
Sodic Silicate 
0.368 
1.515 
Magnesic Oxid 
. 10.330 
42.539 
Ferric and Al. Oxids 
0.036 
0.149 
Ferric and Al. Oxids 0.036 
0.149 
Manganic Oxid. 
0.082 
0.339 
Manganic Oxid ___ 
_ 0.082 
0.339 
Ignition__ 
8.140 
33.521 
Ignition 
_ 8.140 
33.521 
Sum 
100.299 413.034 
Sum_ 
.101.992 
419.716 
Excess Silicic Acid 
0.084 
0.346 
Oxygen Equiv. to 
Chlorin 
. 1.534 
6.319 
Total ._ . 
100.383 413.380 
Total_ 
_100.388 
413.397 
Total Solids, 411.8 grains per imperial gallon. 
* After irrigation. 
§ 59. We probably applied eight inches of water in this 
irrigation and had a very small off-flow, so small that it may be 
neglected in any estimate of the changes produced by the applica¬ 
tion of the water. The whole eight inches may, in this case, be 
regarded as having entered the soil and as resting for the time¬ 
being upon the water plane as it stood before irrigation. That 
this is not correct is evident from what we have observed to be 
the effect of a comparatively small rainfall upon the height of the 
