BULL.N?I3 DIV.OF CHEMISTRY. 



Fig 3 



\**'+nr -. 

 t * a, & 

 * r?* 





".* . is* 



" S 



BUTTER x40 



x40 



PJiolo.l>y CJifford Richardson. 



A.Hnen iCn. Haliacaustic Baltin 



