AQUEOUS SOLUTION OF THE SOIL. 319 



Bonn, Prussia, not freshly manured, and was treated with 

 about one-third its weiglit (36.5 per cent) of cold water 

 for ten days. 



Wunder employed soil from a field of the Experiment 

 Station, Chemnitz, Saxony. This soil had not been re- 

 cently manured, and was of .rather inferior quality (yield- 

 ed rS bushels wheat per acre, English). It was also 

 treated with about one-third its weight (34.5 per cent) of 

 water for four weeks. 



The solutions thus procured contained in 100,000 parts, 

 Bonn. Chemnitz. 



if we assume with Anderson that 1,500 tons (= 3,360,000 

 lbs.) of water remain in these soils to feed a crop, and that 

 this quantity makes solutions like those whose composition 

 is given above, we have dissolved (in pounds per English 

 acre) from the soil of 



These results differ widely from those based on the com- 

 position of drain-water. Eichhorn, by a similar calcula- 

 tion, was led to the conclusion that the soil he operated 

 with was capable of nourishing the heaviest crops with 



