14 The Colorado Experiment Station 
3.6 p. p. m. of nitric nitrogen 971.0 p. p. m. of chlorin with 106.0 
p. p. m. nitric nitrogen 384.7 p. p. m. chlorin; with 3.3 p. p. m. 
nitric nitrogen 962.0 p. p. m. of chlorin, and with 54.0 p. p. m. of 
nitric nitrogen 240.8 p. p. m. of chlorin. These data, the favorable 
and unfavorable, have been given for a strongly alkalized piece of 
ground to show what the facts are which obtain under such con¬ 
ditions. The high nitric nitrogen in well No. 3 is easily explainable. 
For the purpose of comparison we have also given the facts 
presented by a “brown spot” in the same section of the country. 
This “brown spot” occurs on a red, gypsiferous clay and is not on 
seeped land. The water-soluble was mostly gypsum, but the results 
were water-soluble 115,600 p. p. m., chlorin 3,112.0 p. p. m., and 
nitric nitrogen 3,120.0 p. p. m. 
In the second case presented we have followed the same order 
of presentation and of course for the same purpose, and as this 
case has been previously published in its most essential points, I 
shall give it very briefly: 
The alkali; water-soluble .435,000.0 p.p.m. 
Chlorin .261,000.0 p.p.m. 
Nitric Nitrogen .None 
The Soil; water-soluble from.•.24,000.0 to 42,000.0 p.p.m. 
Chlorin . 5,000.0 to 7,000.0 p.p.m. 
Nitric Nitrogen .Traces usually found in soils 
Ground-Water; Total Solids .,.12,600.0 to 15,400.0 p.p.m. 
Chlorin . .. 3,100.0 to 4,600.0 p.p.m. 
Nitric Nitrogen .None or only traces 
Drain-Water; Total Solids.8,489.0 p.p.m. 
Chlorin .2,122.0 p.p.m. 
Nitric Nitrogen . 0.1 p.p.m. 
The “brown spots” in land immediately below this and through 
a part of which the drain-water just given had flowed: 
Soil from “brown spot”; Water-soluble 98,820.0 p.p.m. 
Chlorin .43,480.0 p.p.m. 
Nitric Nitrogen . 494.0 p.p.m. 
Soil from another spot; Water-soluble 44,200.0 p.p.m. 
Chlorin .13,260.0 p.p.m. 
Nitric Nitrogen . 884.0 p.p.m 
Soil from another “brown spot” on land in 
the same district. Soil; Water-soluble 55,300.0 p.p.m. 
Chlorin . 5,500.0 p.p.m. 
Nitric Nitrogen . 4,203.0 p.p.m. 
Soil from another “brown spot,” not in 
the same district. Soil; Water-soluble 83,200.0 p.p.m. 
Chlorin . 658.4 p.p.m. 
Nitric Nitrogen . 987.5 p.p.m. 
The above drain-water contains 21,220 times as much chlorin 
as nitric nitrogen. But this is the water that underlaid the soil on 
