12 



INFLUENCE OF BORAX AND 



CM 



?J 



Oi 



| ' 



I* riS S 



SO loop 



ooooooooo 



0_ 



>" _ 



Oi-i-ii-ii-HOrHrHO 



rPr-'ErST=!copo 

 g" &OOOOOOOOO 



ooooooooo 



20 os os f- p co o oo 

 ^ - 



e 



2> ^ 



t-l 



a 

 El 



^^i^S^S^S^S^I^H^S 



c a 



a, v 

 to to 



i eoeot^cot^r-ost^oo 88 



^. oooooooo 



gapooaqcocooqcqapao 

 6 



Z 



o>a>o>pppcqap 



^ g ~ 



I 



K 







w 



OS 

 i-< 

 CO 



S 



I 



o 







1 



