3^ 



TPIE PHYSICAL PROPERTIES OF SOILS 



FOURTH EXERCISE 



f-BRAis Exre/vs/o/v 



RUBBFR QAiktT 



■CLASS PCRCOLATCR 



PERCOLATION OF WATER THROUGH 



SOILS 



The rate of percolation of water through soils is 



largely dependent upon 

 the texture of the soil and 

 the amount of organic 

 matter present. 



Prepare four glass per- 

 colators by placing a piece 

 of fine copper gauze in the 

 bottom of each and filling 

 to within one-half inch of 

 the top, as follows : 



Percolator No. i — 



Sand. 

 Percolator No. 2 — 

 Mixture, three parts 

 sand, one part or- 

 ganic matter. 

 Percolator No. 3 — 

 Mixture, one part 

 sand, one part or- 



\jMopprR qAuzc Percolator No. 



11 Sandy loam. 



Compact each percolator 

 on the spring-board com- 

 pactor by dropping the weight four times from the 

 lo-inch mark. Fill the remaining half inch with sand 

 to prevent puddling, clamp on the extensions (T) and 



PERCOLATOR TUBE 

 Sectional View 



