22 
The Colorado Experiment Station. 
had been an alfalfa field and a few of the plants were not yet en¬ 
tirely dead. The crowns and roots showed that it had recently 
been a good stand and that the plants had been large. The water 
table was in this case within two and a half feet of the surface. 
ANALYSIS XX 
Soil 
Laboratory 
No. 625 
Percent 
Sand.. 66.822 
Silicic acid (sol.) . 11.303 
Sulfuric acid. 0.042 
Chlorin. 0.703 
Phosphoric acid . 0.042 
Carbonic acid . 4.458 
Lime . 4.294 
Magnesia. 2.339 
Sodic oxid . 0.653 
Potassic oxid . 0.660 
Ferric oxid . 3.089 
Aluminic oxid. 2.005 
Manganic oxid . 0.051 
Water at 100°. 1.250 
Ignition. 2.192 
Sum . 100.663 
Oxygen equiv. chlorin . 0.159 
Total .100.504 
ANALYSIS XXI 
Alkali 
Laboratory 
No. 622 
Percent 
Calcic sulfate . 6.893 
Magnetic sulfate. 17-373 
Sodic sulfate.. 27.868 
Sodic chlorid . 43.466 
Sodic silicate. 0.316 
Ignition, etc. (4.384) 
100.000 
The following three samples are ground waters taken within 
the area under consideration, all of them taken in November and 
December of 1907. 
