THE SOIL 25 



2. Into a tall fruit jar that is nearly full of water, place a hand- 

 ful of garden loam. Stir thoroughly for a minute or two, and let 

 the jar stand for several days. After the stirring has ceased, the 

 sand will settle to the bottom in a very short time ; the silt will 

 settle in a much longer time and form a distinct layer above the 

 sand; the clay will settle so slowly that it will take several 

 days before the water becomes quite clear. At the end of the 

 experiment you will have the soil divided into three fairly 

 distinct layers. 



REFERENCES 



Soil bulletins of the Agricultural College and of the Experiment 

 Station in your state. Farmers' Bulletins: 77, Liming of soils; 

 245, Renovation of worn-out soils; 257, Soil fertility; 266, 

 Management of soil to conserve moisture ; 406, Soil conserva- 

 tion. 



