OF ARTS AND SCIENCES. 101 



No better result was obtained with sodium malonic ester, which 

 acts on the dinitro and trinitro compounds in tiie cold, but even after 

 boiling for some time with the tribrommononitrobenzol yielded only a 

 very small quantity of sodic bromide, while almost all of the tribrom- 

 mononitrobenzol was recovered unaltered. 



