550 



Bulletin 167 

 chart showing the separation 



Hydrogen 

 sulphid 



Nitrogen from 

 asparagin in 

 Uschinsky 

 solution 



Nitrate 



reduction 



+ 

 + 

 + 

 + 

 + 

 + 

 + 

 + 



-I 



+ 



+ 



cxv. 



221.2222732 



+ 

 + 

 + 

 + 

 + 

 + 

 + 



+ 



+ 



+, present; — , absent; ±, trace. 



