30.00 



(/) 



c 

 o 



CD 



♦-• 



c 

 0) 



o 



c 

 o 



ll 



E 

 '^ 



0) 

 C/5 



o 



CD 



20.00 



10.00 



0.00 



"if 





s^ 



* 



Cu Sb Be Pb B Cd Mo Cr Co V As Hg Se Ni Zn 



