74 The Colorado Experiment Station. 
feet deep, the other said to be forty feet deep. I have not seen the 
latter, the water of which was sent to me. We had a little over 
two litres of water to evaporate down. It was a mistake that we 
adopted this method of procedure but it was too late to change it 
when this occurred to me. The water was not a fresh sample when 
we analyzed it. The total solid equalled 560.8 grains per imperial 
gallon, 8,012 p. p. m. This water is yellow in color, has a bitter 
taste, foams strongly when poured or aigtated and had no odor 
though the sample was old when its container was opened. 
The following analysis has been calculated to one hundred: 
ANALYSIS XC 
Water-residue 
Laboratory 
No. 1202 
Percent 
Calcic sulfate . 35.926 
Calcic chlorid . 4.348 
Calcic carbonate . 5.105 
Magnesic carbonate . 4.095 
Magnesic nitrate . 44.939 
Potassic nitrate . 1.870 
Sodic nitrate . 3.717 
100.000 
This analysis shows that the salts in solution are principally 
calcic and mag'nesic salts in which magnesic nitrate is particularly 
abundant. I know of this well only by correspondence . It was 
the only well in the neighborhood yielding such water, other wells 
near by yield sweet water. 
The other well water to which I refer is also yellow. Its 
taste is at first cooling, afterwards bitter. It, too, foams on agita¬ 
tion or pouring. The well is twenty-seven feet deep, the water 
was encountered at the depth of twenty-three feet. The ground 
yielding it was described as one foot thick; no water came in below 
this. There was at the time I visited this place four feet of water 
in the well, i. e., the well was filled up to the top of the water¬ 
bearing zone. The well was not curbed except in the upper portion, 
but was provided with a ladder so that it was easy to go down into 
it. This well was sunk through a somewhat mottled clay. I took 
the mottling to be due to aggregations of calcic carbonate. This 
clay was tenacious enough to stand without peeling off or slough¬ 
ing. There was no water entering above the twenty-three-foot 
point and no indications that any water had ever trickled down 
the sides. The owner has prospected his ranch for water by boring 
holes from eighteen to twenty-eight feet deep, without success. 
He has even dug a fifty-foot well which proved to be a dry one. 
This well is sunken for the most part in Niobrara shales. A little 
water, apparently a little pocket, was met with at a depth of forty 
