COLORADO IRRIGATION WATERS AND THEIR CHANGES. 37 
TABLE XXV.—OFF-FLOW E. END. SEPT. 2. 1899: 1st SAMPLE. * 
Grs. 
Analytical 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Silicic Acid_ 
. 2.056 
0.977 
Sulfuric Acid 
. 32.472 
15.424 
Carbonic Acid... . 
. 14.188 
6.738 
Chlorin__ 
. 2.865 
1.361 
Sodic Oxid ... _ 
. 18.675 
8.871 
Potassic Oxid_ 
0.791 
0.376 
Calcic Oxid 
. 18.641 
8.854 
Magnesic Oxid_ 
6.116 
2.905 
Ferric and Al. Oxids 0.039 
0.077 
Manganic Oxid_ 
0.010 
0.005 
Ignition ___ 
5.069 
2.408 
Sum_ 
.100 922 
47.936 
Oxygen Eq. to Cl._ 
_ 0.646 
0.307 
Total_ 
.100.276 
47.629 
Grs. 
Per 
Imp. 
Combined 
Cent. 
Gal. 
Calcic Sulfate_ 
45.251 
21.494 
Magnesic Sulfate __ 
8.792 
4.176 
Magnesic Chlorid, _ 
3.835 
1.827 
Magnesic Carbonate 
3.294 
1.565 
Potassic Carbonate 
1.160 
0.551 
Sodic Carbonate . 
29.162 
13.852 
Sodic Silicate _ ._ 
3.166 
1.504 
Ferric and Al. Oxids 
0.039 
0.017 
Manganic Oxid_ 
0.010 
0.005 
Ignition 
5.069 
2.408 
Sum _. ... . _ 
99.778 
47.399 
Excess Silicic Acid 
*0.497 
0.236 
Total_ 100.275 
47.635 
Total solids, 47.5 grains per imperial gallon. 
* Sample taken from the first portion of off-flow after running the full length 
of the plot, 600 feet. 
TABLE XXVI.—OFF-FLOW N. SIDE SEPT. 2, 1899; 2nd SAMPLE. * 
Analtical 
Results. 
Per 
Cent. 
Grs. 
Imp. 
Gal. 
Combined. 
Per 
Cent. 
Grs. 
Imp. 
Gal. 
Silicic Acid . _ 
2.069 
0.761 
Calcic Sulfate... ... 
46.511 
17.116 
Sulfuric Acid. 
_ 32.676 
12 025 
Magnesic Sulfate.. 
7.986 
2.939 
Carbonic Acid 
. . 14.379 
5.291 
Magnesic Chlorid. 
3.451 
1.270 
Chlorin.... _ 
2 578 
0.949 
Magnesic Carbonate 
3.317 
1.221 
Sodic Oxid_ 
18.247 
6 715 
Potassic Carbonate. 
0.951 
0.350 
Potassic Oxid 
0.648 
0.238 
Sodic Carbonate . 
29.753 
10.949 
Calcic Oxid... 
19.160 
7.051 
Sodic Silicate . 
1.641 
0 604 
Magnesic Oxid 
5.696 
2.096 
Ferric and Al. Oxids 
0.010 
0 004 
Ferric and Al. 
Oxids 0.010 
0.004 
Manganic Oxid 
0.060 
0.022 
Manganic Oxid 
0.060 
0.022 
Ignition 
5.076 
1868 
Ignition 
5 076 
1.868 
Sum 
98.756 
36.343 
Sum 
100 599 
37.020 
Excess Silicic Acid 
1.261 
0 464 
Oxygen Eq. to 
Cl... 0 5sl 
0.214 
Total __ 
100.017 
36.807 
Total 
loo 018 
36 806 
Total solids, 36.8 grains per imperial gallon. 
* Sample taken just before on-flow was cut off. 
TABLE XXVII.—OFF-FLOW E. END, SEPT. 2,1899, 2nd. SAMPLE.* 
Analytical 
Per 
Grs. 
Imp. 
Per 
Grs. 
Imp. 
Results 
Cent 
Gal. 
Combined. 
Cent 
Gal. 
Silicic Acid. . _ 
2.725 
1.150 
Calcic Sulfate __ . 
41.989 
17.719 
Sulfuric Acid.. 
34.007 
14.351 
Magnesic Sulfate, __ 
14.588 
6.156. 
Carbonic Acid.. 
12.588 
5.312 
Magnesic Chlorid,. 
2.296 
0.969 
Chlorin . _ _ 
3.029 
1.278 
Potassic Chlorid _ 
1.290 
0.544 
Sodic Oxid.. _ 
18.978 
8.009 
Sodic Chlorid. _ _ . _ 
1.157 
0.488 
Potassic Oxid 
0.815 
0.344 
Sodic Carbonate,. 
30.353 
12.809 
Calcic Oxid 
17.709 
7.473 
Sodic Silicate 
1.184 
0.499 
Magnesic Oxid.. 
5.829 
2.460 
Ferric and Al. Oxids 
0.316 
0.133 
Ferric and Al. Oxids 
0.316 
0.133 
Manganic Oxid 
0.010 
0.004 
Manganic Oxid 
0.010 
0.004 
Ignition . 
5.116 
2.159 
Ignition 
5.116 
2.159 
Sum 
98.299 
41.480 
Sum 
101.124 
42.673 
Excess Silicic Acid 
2.142 
0.904 
Oxygen Eq. to Cl.__ 
0.682 
0.288 
Total 
100.441 
42.384 
Total 
100.440 
42.385 
Total solids, 42.2 grains per imperial gallon. 
* Sample taken just before on-flow was cut off. 
