14 



SOILS AXD PLANT LIFE 



EXERCISE i 



Object. — To see how soil types vary in the rate at 

 which they take up water. 



Procedure. — Tie pieces of cheesecloth firmly over the 

 small ends of three lamp chimneys or glass cylinders. 



Fig. 5. — Adding water to the soil. 



Fill the first one with clay, the second wth silt, the third 

 with sand. These soils should be air dried, and then 

 worked through a piece of fine screen wire. Tap the 

 chimneys or cjdinders firmly on the table to settle the soil. 

 Place the tubes in a rack, and proceed as shown in the 

 followng illustration. 



Three tumblers or cups of equal capacity should be 



