COLORADO IRRIGATION WATERS AND THEIR CHANGES. 13 
TABLE II.—ANALYSIS OF CACHE A LA POUDRE WATER, 
SAMPLE TAKEN ABOVE THE NORTH FORK, NOV. 3, 1902. 
Grs. 
Analytical 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Silcic Acid_ 
.... 20.871 
0.6053 
Sulfuric Acid . 
_ 6.928 
0.1946 
Carbonic Acid 
___. 20.790 
0.6029 
Chlorin .... 
. . _ 3.575 
0.1037 
Sodic Oxid __ 
.... 12.931 
0.3750 
Potassic Oxid 
.... 2.949 
0.0855 
Calcic Oxid 
.... 18.741 
0.5238 
Strontic Oxid 
_Trace 
Trace 
Magnesic Oxid 
.... 4.336 
0.1257 
Ferric and Alu.Oxids 0.388 
0.0113 
Manganic Oxid 
0.063 
0.0018 
Ignition ... 
.... [9.233] 
0.2678 
Sum.. .100.805 
Oxygen Equiv. to 
Chlorin_ .805 
Total_100.000 2.8974 
Total solids, 2.9 grains per imperial gallon 
Grs. 
Per 
Imp. 
Combined. 
Cent. 
Gal. 
Calcic Sulfate _ 
11.782 
0.3417 
Calcic Carbonate. __ 
24.781 
0.7186 
Magnesic Carbonate 
9.063 
0.2628 
Sodic Chlorid 
5.899 
0.1711 
Potassic Carbonate 
4.325 
0.1254 
Sodic Carbonate_ 
9.146 
0.2652 
Sodic Silicate . 
8.772 
0.2544 
Ferric and Alu. Oxids 
; 0.388 
0.0113 
Manganic Oxids_ 
0.063 
0.0018 
Ignition . _ ... 
[9,.233] 
0.2678 
Sum . _ 
83.452 
Excess Silicic Acid. 
16.546 
0.4798 
Total ... _ 
99.998 
2.8999 
SANITARY ANALYSIS. 
Parts Per Million. 
Total Solids_ 41.4286 
Chlorin _ 1.9804 
Nitrogen as Nitrates_Trace. 
Nitrogen as Nitrites_ None. 
Parts Per Million 
Saline Ammonia ___ 0.0350 
Albuminoidal Ammonia._ 0.0900 
Oxygen Consumed_ 2.5500 
TABLE III.—ANALYSIS OF CACHE A LA POUDRE WATER, 
SAMPLE TAKEN 150 FEET ABOVE HEADGATE OF LARI- 
MER COUNTY DITCH, JULY 30, 1902. 
Grs. 
Grs. 
Analytic 
Per 
Imp. 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Combined. 
Cent. 
Gal. 
Silicic Acid_ 
_ 20.542 
0.5341 
Calcic Sulfate_ 
8.420 
0.2189 
Sulfuric Acid.. 
_ 4.951 
0.1287 
Calcic Carbonate. __ 
36.431 
0.9471 
Carbonic Acid. 
_ 21.626 
0.5622 
Magnesic Carbonate 10.758 
0.2797 
Chlorin _ 
_ 7.619 
0.1980 
Sodic Chlorid ... .. 
12.573 
0.3276 
Sodic Oxid _ 
_ 8.874 
0.2307 
Potassic Silicate _ 
5.391 
0.1402 
Potassic Oxid 
_ 3.286 
0.0854 
Sodic Silicate ... _ 
4.342 
0.1129 
Calcic Oxid 
_ 23.884 
0.6209 
Ferric and Alu. Oxids 0.894 
0.0232 
Magnesic Oxid 
5.147 
0.1338 
Manganic Oxid 
0.093 
0.0024 
Ferricand Alu. Oxids 0.894 
0.0232 
Ignition 
4.802 
0.1248 
Manganic Oxid 
0.093 
0.0024 
Ignition 
T4.8021 0.1248 
Sum . __ 
83.704 
Excess Silicic Acid 
16.296 
0.4237 
Sum_ 
_101.718 
2.6443 
Oxygen Equiv. 
to 
Total_ 
100.000 
2.6005 
Chlorin 
_ 1.718 
0.0446 
Total 
.100.000 
2.5997 
Total solids, 2.6 grains per imperial gallon. 
SANITARY 
Parts Per Million. 
Total solids_ ... _ 37.1400 
Chlorin ... .. ..... 2.8300 
Nitrogen as Nitrates _ 0.1000 
Nitrogen as Nitrites _ None 
ANALYSIS. 
Parts Per Million. 
Saline Ammonia_ 0.0200 
Albuminoidal Ammonia... 0.3400 
Oxygen Consumed_ 1.6570 
