OP ARTS AND SCIENCES. 



87 



were mixed with a little alcohol, and somewhat less than the amount 

 of sodic hydrate (also in alcoholic solution) necessary to form a mono 

 sodium salt ; a little ether was then added to the dark red solution, 

 which was evaporated rapidly to dryness, the small beaker containing 

 it beiuff sunk throuajhout its leuijth in the steam bath. After this the 

 excess of unaltered ester was extracted with benzol, and the salt dried 

 at 100°, and analyzed with the following results: — 



I. 0.2596 gr. of the salt gave after evaporation and ignition with 



sulphuric acid 0.0672 gr. of sodic sulphate. 

 II, 0.2848 gr, of the salt gave 0.0698 gr. of sodic sulphate. 



Calculated for 

 CoU(C„HiNNa)(NO,),CONa(C02C2HB)2. 



Sodium 8.81 



Found. 



I. 



8.39 



II. 



7.94 



These results agree with the percentage corresponding to the for- 

 mula as nearly as can be expected, when it is remembered that the 

 salt was not crystallized, or purified in any other way ; but still we 

 cannot feel that they do more than make it highly probable that this 

 is the composition of the salt, as it is certainly strange that a neutral 

 salt should have been formed when such an excess of the acid sub- 

 stance was present, and we had no means of proving that the substance 

 analyzed was a pure salt rather than a mixture ; in fact, we observed 

 a slight smell of phenylisocyauide during its preparation, indicating a 

 deep decomposition of part of it, — only a very small part, however, if 

 we may judge from the smell. 



Properties. — The salt prepared as described above formed a dark 

 reddish brown to black amorphous mass, soluble in water or alcohol ; 

 slightly soluble in ether ; insoluble in benzol. Its solutions have a 

 brownish red color. 



The behavior of a solution of the ammonium salt of anilidotrinitro- 

 phenyltartronic ester, made by adding ammonic hydrate to an excess 

 of the ester, although it smelt strongly of ammonia, was tested with 

 various reagents and gave the following characteristic precipitates : — 



With a zinc salt, orange-brown. 



With a manganese salt, brown. 



With a cadmium salt, reddish brown. 



With a copper salt, yellowish brown. 



With a lead, mercuric, or silver salt, reddish brown. 



The fact that the ammonium salt gives no precipitate with salts of 

 magnesium, calcium, strontium, or barium, is also highly characteristic. 



Although, as has been already stated, no definite results were ob- 



