SETTLING VELOCITIES IN MICRONS PER SECOND 



COARSE MEDIUM 



SAND SAND 



DIAMETERS IN MICRONS 



FINE IvERV FINeI COARSE I MEDIUM I FINE IvERY FINeI COARSE MEDIUM ] FINE IvERY FINE 



SETTLING VELOCITIES IN MICRONS PER SECOND 



DIAMETERS IN MICRONS 



COARSE me:dium 



SAND SAND 



FINE 

 SAND 



IVERY FINE COARSE 

 SANO SILT 



MEDIUM 

 SILT 



FINE VERY FINE COARSE MEDIUM 



SILT SILT CLAY CLAY 



FINE VERY FINE 



CLAY CLAY 



FIGS. 21-22 — SETTLING VELOCITIES IN MICRONS PER SECOND AT 20 "C, SAMPLES 49 AND 19 



144 



