SETTLING VELOCITIES IN MICRONS PER SECOND 



30 



COARSE 

 SAND 



MEDIUM 



SAND 



DIAMETERS IN MICRONS 



riNE 



SAND 



VERY FINE COARSE 

 SAND SILT 



MEDIUM 

 SILT 



FINE 

 SILT 



VERY FINE COARSE 

 SILT CLAY 



MEDIUM 

 CLAY 



FINE 

 CLAY 



VERY FIN 

 CLAY 



SETTLING VELOCITIES IN MICRONS PER SECOND 



DIAMETERS IN MICRONS 



C0Aft5E MEDIUM 

 SANO SAND 



FINE 

 SAND 



VERY FINE COARSE 

 SAND SILT 



MEDIUM 

 SILT 



FINE 

 SILT 



VERY FINE COARSE 

 SILT CLAY 



MEDIUM 

 CLAY 



FINE 

 CLAY 



VERY FINE 

 CLAY I 



FIGS. 15-16— SETTLING VELOCITIES IN MICRONS PER SECOND AT 20 C , SAMPLES 72 AND 73 



141 



