PRACTICE XXiri (Continued) 



Soils 



Sand or 

 Sandy 

 Loam 



Gray Silt 



OR Gray 



Silt Loam 



Brown- 

 Silt Loam 



Clay or 

 Clay Loam 



Peat 



Time (minutes) for 1 liter 



Loose 













to come through . . 



Compact 













Loose Soil, Wet 







1 





Mixtures 



Sand + 10% 

 Peat 



Gray Silt + 

 10% Peat 



Brown Silt 



Loam + 10% 



Peat 



Loess 



Loess + 10% 





Peat 



Time for 1 liter to come 



Loose 













through 



Compact 













■^nrg^ 



Fig. 6. Aspirator Apparatus (modified) (after McCall) 



49 



