OF ARTS AND SCIENCES. 287 



vents when hot ; easily soluble in chloroform or acetone, even in 

 the cold. As the benzol solution deposits the substance in a vis- 

 cous state, it is best to crystallize from a mixture of alcohol and 

 benzol, as described above in speaking of its preparation. Strong 

 hydrochloric acid has no action upon it. Strong nitric acid seems to 

 decompose it, dissolving a little of the product. Strong sulphuric acid 

 dissolves it with a yellowish brown color. 



Neither sodic or ammonic hydrate, nor potassic carbonate, nor acid 

 sodic carbonate, gives any action with it in aqueous solution, hot or 

 cold, or even on addition of alcohol ; but if it is warmed with sodic 

 hydrate, water, and alcohol, a little dissolves with a brown color, and 

 if a drop of sodic hydrate is added to an alcoholic solution, a dark 

 brownish red solution is formed, which is decomposed by water. It 

 may be, therefore, that the substance has not lost completely the power 

 of forming salts, but it is on the whole more probable that the salt is 

 derived from anilidodinitrobenzylmethylketone formed by the action of 

 the sodic hydrate on the hydrazone, as the action was certainly accom- 

 panied by decomposition, since there was a smell of isocyanphenyl, 

 and the hydrazone could not be recovered from the solution in sodic 

 hydrate. 



The study of the bromdinitrobenzylmethylketone will be continued 

 in this laboratory. 



