SETTLING VELOCITIES IN MICRONS PER SECOND 



COARSE MEDIUM 



SAND SAND 



DIAMETERS IN MICRONS 



FINE VERY FINE COARSE MEDIUM 



SAND SAND SILT SILT 



FINE VERT FINE COARSE MEDIUM 



SILT SILT CLAY CLAY 



VERY FINE 



SETTLING VELOCITIES IN MICRONS PER SECOND 



DIAMETERS IN MICRONS 



MEDIUM 

 SAND 



FINE 

 SAND 



VERY FINE 

 SANO 



COARSE 

 SILT 



MEDIUM 

 SILT 



FINE 



SILT 



VERY FINE COARSE 

 SILT CLAY 



MEDIUM 

 CLAY 



FINE 

 CLAY 



VERY FINE 

 CLAY 



FIGS. 23-24 — SETTLING VELOCITIES IN MICRONS PER SECOND AT 20 t, SAMPLES 21 AND 23 



145 



