Concentration of Fullers Earth (g Z “ty 
px) 
oO 
48 
(4%) 
fo 
ib) 
$ 
() 
0 12 24 36 48 60 
Exposure Time (h) 
Figure 7. LCjg and LCsg values for spot at 12-, 18-, 24-, and 48-hour 
exposures to suspensions of fuller's earth. 
22 
