22 
Bulletin 72. 
level changes. The samples, of which analyses have just been given, 
were taken when the water plane was relatively high and the ground 
water contained rather more than 28.5714 parts per thousand. 
The following sample was taken when the water plane had been 
raised by irrigating the plot, and the total solids present in the 
water were almost 70 per cent, higher than on May 30th, when the 
preceding samples were taken. While there are some differences, 
they are comparatively small, which fact appears most clearly from 
the percentage composition of the total solids as given by the direct 
results of the analysis which follows: 
TABLE III.—. 
ANALYSIS OF WATER FROM WELL G, JULY 11, 1898. 
Grs. 
Grs. 
Analytical 
Per 
Imp. 
Per 
Imp. 
Results. 
Cent. 
Gal. 
Combined. 
Cent. 
Gal. 
Silicic Acid ... 
. 0.337 
1.149 
Calcic Sulfate. 
32.866 112.073 
Sulfuric Acid. 
. 46.106 157.221 
Magnesic Sulfate. 
27.162 
92.622 
Carbonic Acid. 
. 3.456 
11.785 
Potassic Sulfate. 
1.845 
6.283 
Chlorin. 
. 6.317 
21.541 
Sodic Sulfate. 
13.897 
47.389 
Sodic Oxid.... 
. 17.165 
58.533 
Sodic Chlorid. 
10.424 
35.546 
Potassic Oxid 
. 1.002 
3.417 
Sodic Carbonate. 
8.333 
28.416 
Calcic Oxid .. 
.13.539 
46.168 
Sodic Silicate. 
0.684 
2.332 
Magnesic Oxid 
. 9.052 
30.867 
Ferric and Alu. Oxids 
0.070 
0.239 
Ferric and Alu. 
Oxids 0.070 
0.239 
Manganic Oxid. 
0.060 
0.205 
Manganic Oxid 
. 0.060 
0.205 
Ignition.. 
4.352 
14.840 
Ignition. 
. 4.352 
14.840 
— 
Sum. 
99.693 
339.945 
Sum. 
.101.456 345.965 
Excess Sodic Oxid.... 
0.337 
1.149 
Oxygen Eq. to Chlorin 1.423 
4.852 
• 
— 
Total. 
100.030 341.094 
Total... 
.100.033 341.113 
Total solids 4.7711 parts per thousand, or 341.0 grains per imperial gallon. 
§ 67. What has just been said is true of the water of all of the 
wells throughout the three seasons during which we had them 
under observation. 
§ 68. The salts present, that is constituting the total solids, in 
the waters are calcic, magnesic, and sodic sulfates with sodic car¬ 
bonate and chlorid. 
§ 69. In the analyses already given, and in those to follow, I 
have combined the acids and basis in the order adopted in Bulletin 
65, believing that this order represents as nearly as any other 
which might have been adopted, the salts which actually exist in 
the solution. It is certainly not always correct, but it gives us an 
easy and uniform method of statement. That it is not correct in 
every case is clear, for the sodic carbonate appears in the analysis 
as the normal salt, which when present in the quantities shown 
by the analyses, ought to react with phenolphthalein, but it does 
not, and is probably present wholly as the acid carbonate or bicar¬ 
bonate. The total carbonic acid in the waters as they were taken 
from the wells was not determined, still there is no doubt but that 
