24 
SOILS AND ALKALI. 
eighteen inches of water. It had a slightly alkaline taste. 
It contained 84 grains to the gallon of solid matter: 
Sulphuric acid (S03)_38.28 per cent. 
Iron and alumina (Fe2 03 
J- A12 03)_ 
_2.50 
u 
Magnesia (Mg 0) 
7.25 
u 
Calcium (Ca 0) 
_13.17 
u 
Carbonic acid (C02) 
_19.00 
it 
Alkalies (Na2 0) 
_19.17 
u 
99.90 
a 
The analysis shows about 38 per cent, of carbonate of 
soda in the residue. It was contemplated in the experi¬ 
ment to have a field so arranged that the seepage water 
could be used over and over again, to see what effect it 
would have upon the crops, and to ascertain its composition 
and the amount of solid matter when it became useless 
for irrigating purposes. Such a field was not available 
this year. To guide the farmer as to the least amount 
that could be detected by the taste, one gallon of dis¬ 
tilled water was taken and the alkali before analyzed 
added until it was manifest to the taste. As the result of 
three experiments, it was found that 300 grains to the gal¬ 
lon must be added before it could be detected. There are 
about Fort Collins a number of reservoirs. The water in 
three of these was analyzed. 
Reservoir No 2 is about five miles from the foot¬ 
hills. The water is carried from the river in an open 
ditch about twenty miles long. It was analyzed in May, 
1889, when it was being filled. Found 52 grains of solid 
matter to the gallon : 
Iron and alumina (Fe2 03 
-L A12 03)_2.10 per cent. 
Lime (Ca 0) 
_14.00 
u 
Magnesia (Mg 0) 
_42.65 
u 
Sulphuric acid (S03). 
— 22.10 
u 
Carbonic acid (CO2) 
_14.41 
u 
Chlorine (Cl) 
___ 3.54 
.1 
Alkalies (Na2 0) 
___ 1.09 
u 
99.89 
a 
