A. ALTERNATE QUARTERS 

 COMBINED AS SHOWN IN 

 FIGURE 5 



FIGURE 6 



99.99 



TOTAL PERCENT PROB 

 ABLE ERROR OF THE - 

 MEDIAN = I .3 



MEAN OF THE MEDIAN 

 DIAMETER = 0.391 



PERCENT 

 ERROR = 



SPLITTING 

 1.0 



B. ALTERNATE QUARTERS 

 NOT COMBINED 



TOTAL PERCENT PROBABLE 

 ERROR OF MEDIAN = 1.1 



MEAN OF THE MEDIAN 

 DIAMETER = 0. 397 



PERCENT SPLITTING 

 ERROR =0.8 



SETTLING TUBE ANALYSES OF EIGHT 

 PORTIONS OF THE SAME SAND 



.0 .8 



.2 1.0 .8 .6 



MEDIAN DIAMETER IN mm. 



