Bui. 131, Bureau of Chemistry, U. 5. Dept. of Agriculture. 



PLATE I. 



FIG. 1. AFTER STANDING Two MINUTES. 



FIG. 2. AFTER STANDING FIFTY MINUTES. 



EFFECT OF DIFFERENT TREATMENTS ON THE SETTLING OF LEAD 



ARSENATE. 



n. I,i':nl acetate \\<^'>\; b, lead nitrate used; < and d. same as a and h, but liavc IKHMI druMl nut 

 and a^uiu mixed with water. 



