The Ground Water. 
23' 
the sodic carbonate existed essentially if not wholly as a bicarbon¬ 
ate. Again the calcic sulphate appears in the analysis without any 
water of cr 3 T stallization, but it is in no way intended to state that 
calcic sulphate was actually present as anhydrite. I do not think it 
possible to tell just how these groups were arranged in the solution, 
how many of them were free and how many of them combined, 
but I simply present the probable combinations as an easy and con¬ 
venient way of expressing our results. The statement of the analy¬ 
sis is so full that further explanation is unnecessary.] 
[ I S 70. I find it a common thing, almost a rule, that the 
analyses show a slight excess of sodic oxid, sometimes, however, the 
excess is silicic acid. I have also found this to be a common re¬ 
sult in the analysis of alkali incrustations. I attributed this excess 
to the probable presence of organic acids. Examinations for vola¬ 
tile organic acids did not justify the assumption of the excess being 
due to their presence, for I found them present in very minute 
quantities. The excess of sodic oxid is usually higher when the 
loss on ignition is high, than it is when this loss is low. The ex¬ 
cess is often very insignificant and within the limits of analytical 
errors. 
§ 71. For the purpose of presenting the general composition 
of the well waters I will give analyses of samples taken in the 
month of July, 1897 and 1898, because I think that the samples of 
this month show less uniformity than those of any other in which 
regular samples were taken. The following are all of the samples 
taken from these w T ells during this month, except some taken imme¬ 
diately after irrigation. 
TABLE IV.— 
ANALYSIS 
OF WATER FROM WELL A, JULY 5, 
1897. 
A nalytical 
Per 
LrVS. 
Imp. 
Per 
(jVS' 
I mp * 
Results. 
Cent. 
Gal. 
Combined. 
Cent. 
Gal • 
Silicic Acid .... 
. 0.474 
1.223 
Calcic Sulfate. 
36.500 
94,207 
Sulfuric Acid .. 
. 48.853 126.090 
Magnesic Sulfate. 
28.795 
74.320 
Carbonic Acid.. 
. 1.997 
5.154 
Potassic Sulfate. 
0.594 
1.533 
Chlorin. 
. 5.598 
14.448 
Sodic Sulfate. 
13.995 
36.121 
Sodic Oxid. .. . 
. 14.373 
37.097 
Sodic Cklorid. 
9.233 
23.830 
Potassic Oxid.. 
..* 0.321 
0.829 
Sodic Carbonate. 
4.815 
12.428 
Calcic Oxid .. .. 
. 14.999 
38.712 
Sodic Silicate. 
0.963 
2.486 
Magnesic Oxid. 
. 9.596 
24.767 
Ferric and Alu. Oxids 
0.177 
0.457 
Ferric and Alu. 
Oxids 0.177 
0.457 
Manganic Oxid. 
0.143 
0.369 
Manganic Oxid. 
. 0.143 
0.369 
Ignition. 
4.410 
11.382 
Ignition. 
. 4.410 
11.382 
Sum. 
99.625 
257.133 
Sum . .. . 
.100.941 260.528 
Excess Sodic Oxid.. . 
0.054 
0.139 
Oxygen Eq. to Chlorin 1.261 
3.255 
Total. 
99.679 
257.272 
Total. 
. 99.680 257.273 
Total solids 3.6871 parts per thousand, or 258.1 grains per imperial gallon. 
Sample taken six days after irrigation. 
