Proceedings. 417 



gave the following figures, which point to its being a 

 mixture of a nitro with an oxidised body : — 



Carbon... 50-50 % 



Hydrogen 6*13 



Oxygen 37-94 



Nitrogen 5-43 



100-00 



The nitrogen is too low and the oxygen much too high 

 for such a body as CioHisNOg. A similar substance has 

 been obtained by acting on caoutchouc with fuming nitric 

 acid in a freezing mixture, and also by the action of the 

 higher order of nitrogen. The investigation is being con- 

 tinued. 



