28 



BULLETIN 448, U. S. DEPARTMENT OF AGBICULTURE. 



yl alcoholl 

 oline (3:1) 

 N sodium 

 ydroxid 

 Dlution. 











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Amyl alcohol 

 gasoline mix- 

 ture (1:1) and 

 N/64 sodium 

 hydroxid 

 solution. 



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ther and 

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GO 



