COLORADO IRRIGATION WATERS AND THEIR CHANGES. 61 
TABLE XLIX — ANALYSIS OF BOULDER CREEK WATER, 
TAKEN FROM TAP IN BOULDER, AUG. 27, 1902. * 
Grs. 
Analytical 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Silicic Acid_ 
21.985 
0.6156 
Sulfuric Acid_ 
8.305 
0.2325 
Carbonic Acid_ 
17.037 
0.4770 
Chlorin_ 
7.425 
0.2079 
Sodic Oxid... .. ._ 
6.870 
0.1924 
Potassic Oxid__ 
2.720 
0.0762 
Lithic Oxid __ 
Trace 
Trace 
Calcic Oxid _. _ 
23.373 
0.6544 
Strontic Oxid_ 
0.165 
0.0046 
Magnesic Oxid... . 
4.760 
0.1313 
Ferric and Al. Oxids 
1.098 
0.0307 
Manganous Oxid... 
0.340 
0.0095 
Zincic Oxid _____ 
Trace 
Trace 
Ignition__ 
[7.607] 
0.2130 
Sum . 
101.676 
2.8451 
Oxygen Eq. to Cl.__ 
1.676 
0.0469 
Total _ _. 
100.000 
2.7982 
Grs . 
Per 
Imp. 
Combined. 
Cent. 
Gal. 
Calcic Sulfate_ 
14.124 
0.3955 
Calcic Carbonate. __ 
31.317 
0.8769 
Strontic Carbonate. 
0.235 
0.0066 
Magnesic Carbonate 
6.143 
0.1720 
Magnesic Chlorid__ 
4.305 
0.1205 
Potassic Chlorid ___ 
4.304 
0.1205 
Sodic Chlorid_ 
3.586 
0.1004 
Sodic Silicate_ 
9.818 
0.2749 
Lithic Oxid. 
Trace 
Trace 
Ferric and Al. Oxids 
1.098 
0.0307 
Manganous Oxid___ 
0.341 
0.0095 
Zincic Oxid . 
Trace 
Trace 
Ignition_ . 
[7.607] 
0.2130 
Sum . 
82.878 
2.3205 
Excess Silicic Acid 
17.144 
0.4789 
Total __ __ 
100.022 
2.7994 
Total solids, 2.8 grains per imperial gallon. 
SANITARY ANALYSIS. 
Parts Per Million. 
Total Solids.. __ 40.000 
Chlorin_ 2.970 
Nitrogen as Nitrates_ 0.100 
Nitrogen as Nitrites_ None 
Parts Per Million. 
Saline Ammonia__Trace 
Albuminoidal Ammonia... 0.050 
Oxygen consumed_ 1.170 
* Attention is called to the similarity of this analysis to those of the Poudre 
water, pages 13,14 and 15. 
TABLE L.—ANALYSIS OF WATER DRAWN FROM TAP IN OF¬ 
FICE OF DENVER FIRE CLAY CO., DENVER, AUG. 26, 1902. 
Grs. 
Analytical 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Silcic Acid_ 
2.573 
0.427 
Sulfuric Acid __ 
25.785 
4.280 
Carbonic Acid__ _ . 
14.110 
2.342 
Chlorin _ _ 
7.508 
1.240 
Sodic Oxid __ 
13.447 
2.232 
Potassic Oxid_ 
1.261 
0.209 
Calcic Oxid_ . 
23.640 
3.924 
Magnesic Oxid 
6.022 
1.000 
Ferric and Al. Oxids 
0.071 
0.012 
Manganic Oxid _ 
0.178 
0.030 
Ignition 
7.097 
1.178 
Sum . 
101.692 
16.874 
Oxygen Eq. to Cl.__ 
1.692 
0.281 
Total 
100.000 
16.593 
Grs. 
Per 
Imp. 
Combined. 
Cent. 
Gal. 
Calcic Sulfate_ 
43.853 
7.280 
Calcic Carbonate. __ 
9.943 
1.651 
Magnesic Carbonate 
12.587 
2.089 
Potassic Carbonate 
1.849 
0.307 
Sodic Chlorid_ 
12.390 
2.057 
Sodic Carbonate.. 
6.236 
1.035 
Sodic Silicate 
5.218 
0.866 
Ferric and Al. Oxids 
0.071 
0.012 
Manganic Oxid 
0.178 
0.030 
Ignition _ _ _ 
7.097 
1.178 
Sum 
99.422 
16.505 
Excess Sodic Oxid 
0.576 
0.095 
Total 
99.998 
16.600 
Total solids 16.6 grains per imperial gallon. 
SANITARY ANALYSIS. 
Parts Per Million. 
Total Solids__237.142 
Chlorin_21.780 
Nitrogen as Nitrates_ 0.500 
Nitrogen as Nitrites_0.540 
Parts Per Million. 
Saline Ammonia _ 0.100 
Albuminoidal Ammonia... 0.180 
Oxygen consumed_ 1.453 
