COLORADO IRRIGATION WATERS AND THEIR CHANGES. 41 
SANITARY ANALYSES OF IRRIGATION WATERS, AUGUST 31 
TO SEPTEMBER 2, 1899. 
Ditch water as it flowed onto the plot. Sept. 1, 1899. 
Seepage water as it flowed onto the plot. 
Water as it flowed off at north side of plot. Sept. 2, 1899. Be¬ 
ginning of off-flow. 
Water as it flowed off at east end of plot. Sept. 2, 1899. Begin¬ 
ning of off-flow. 
Water as it flowed off at north side of plot. End of off-flow. 
Water as it flowed off at east end of plot. End of off-flow. 
Water of well A. August 31, 1899. Before irrigation. 
August 31, 1899. Before irrigation. 
August 31, 1899. Before irrigation. 
August 31, 1899. Before irrigation. 
September 2, 1899. After irrigation. 
September 2, 1899. After irrigation. 
September 2, 1899. After irrigation. 
September. 2, 1899. After irrigation. 
1 . 
2 . 
3. 
5 . 
6 . 
7. 
8 . 
9. 
10 . 
11 . 
12 . 
13. 
14. 
Water of well B. 
Water of well C. 
Water of well D. 
Water of well A. 
Water of well B. 
Water of well C. 
Water of well D. 
SANITARY ANALYSES OF WATER BEFORE AND AFTER IRRIGATION. 
PARTS PER MILLION. 
Total 
Solids 
Chlo- 
rin 
Nitrates 
Nitrites 
Ammonia 
Albuminoidal 
Ammonia 
Oxy¬ 
gen 
Con¬ 
sumed 
Nitro¬ 
gen 
Nitric 
Acid 
Nitro¬ 
gen 
Nitrous 
Acid 
Nitro¬ 
gen 
Am¬ 
monia 
Nitro¬ 
gen 
Am¬ 
monia 
1 
328.5 
9.40 
Trace 
Trace 
0.4400 
1.6730 
0.3180 
0.3860 
0.3380 
0.4100 
4.625 
2 
707.1 
15.30 
Trace 
Trace 
0.0700 
0.2340 
0.1820 
0.2210 
0.3140 
0.3825 
4.450 
3 
1240.0 
50.70 
0.440 
1.970 
0.1400 
0.4690 
0.3160 
0.3840 
0.5540 
0.6720 
7.740 
4 
678 5 
27.10 
0.240 
1.077 
0.2600 
0.8700 
0.0560 
0.0680 
0.2490 
0.3020 
3.875 
5 
525.7 
17.10 
Trace 
Trace 
0.1100 
0.3680 
0.0630 
0.0765 
0.3540 
0.4290 
4.555 
6 
602.8 
18.70 
0.080 
0.359 
0.1000 
0.3348 
0.0840 
0.1020 
0.3420 
0.4150 
5.720 
7 
1652.8 
76.80 
0.440 
1.970 
0.0025 
0.0088 
0.0320 
0.0388 
0.2500 
0.3029 
8 
1922.8 
99.50 
0.480 
2.154 
0.0003 
0.0010 
0.0190 
0.0230 
0.0950 
0.1147 
9 
1175.8 
57.40 
0.560 
2.513 
0.0025 
0.0084 
0.0220 
0.0267 
0.0560 
0.0674 
10 
917.1 
43.10 
0 600 
2.692 
0.0250 
0.0837 
0.0700 
0.0850 
0.0860 
0.1038 
11 
2340.0 
108.10 
0.720 
3.231 
0.0025 
0.0084 
0.0470 
0.0570 
0.2260 
0.2740 
12 
2120.0 
103.40 
0.440 
1.970 
0.0060 
0.0200 
0.0600 
0.0738 
0.1430 
0.1730 
13 
4917.1 
374.30 
1.700 
7-628 
0.0300 
0.1000 
0.4760 
0.5780 
2.5680 
3.1170 
14 
3761.4 
107.70 
0.360 
1.605 
0.0900 
0.1090 
0.4120 
0.5000 
2.3000 
2.7920 
§ 64. We had, as already stated, a good supply of water and 
can therefore make our calculations • on the basis of an acre-foot 
and approximate closely to the results actually produced. As it 
was impossible to determine with any approach to accuracy the 
amount of seepage water which got mixed with the .ditch water 
before it reached the plot, I will neglect it in our estimate but 
will state separately the amount of salts carried by the seepage as 
we collected it. The results so far as the amount and character 
of the salts in the ground water will not be affected thereby. 
