OF ARTS AND SCIENCES. Ill 



Found. 



Carbon 44.18 



Hydrogen 4.51 



Cbloriue 11.69 



We were engaged on the study of this substance when we received 

 Barr's paper, and accordingly stopped our work on this subject, and 

 we publish these analyses only because they may be of use to any one 

 who may continue the investigation of this substance, as it would be 

 idle to try to derive a formula from them until they have been sup- 

 ported by further work. Barr also observed the formation of this sub- 

 stance, but did not attempt to study it carefully, or analyze it. 



It seems probable that the pentamidobenzol, in addition to the tri- 

 chloride, can form a pentachloride^ as one of our first prepai-ations, in 

 which the reduction was carried on at a lower temperature than usual, 

 yielded a substance which, dried at first in a desiccator over calcic 

 chloride without any alkaline absorbent, and finally for a short time 

 in an air bath at 90°, gave the following result on analysis. 



0.1738 grm. of the substance gave 30.9 c.c. of nitrogen at a tempera- 

 ture of 6° and a pressure of 750 mm. 



Calculated for C-.H^NHjCOg. Found. 



Nitrogen 20.86 21.37 



The appearance of Barr's paper has prevented us from making an- 

 other attempt to prepare this substance. If it is a definite compound, 

 it is a very unstable one, as it gave off a distinct smell of hydrochloric 

 acid. 



Trianilidodiriitrobenzol, C^Y{{ C6H-NH)3(NO,,)2. 



This substance can be made by heating for a short time aniline with 

 tribromdinitrobenzol in the proportion of six molecules of the base to 

 one of the bromine compound. It seems that the two substances do 

 not act on each other in the cold, or, if there is any action, it is a very 

 slow one, and in this respect the dinitro compound differs from the tri- 

 bromtrinitrobenzol, which acts on aniline quickly at ordinary tempera- 

 tures. The product was purified by crystallizing it from alcohol till 

 it showed the melting point 179°, dried at 100°, and analyzed with 

 the following results. 



I. 0.1820 grm. of the substance gave on combustion 0.4347 grm. of 

 carbonic dioxide and 0.0760 grm. of water. 

 II. 0.1906 grm. of the substance gave 26 c.c. of nitrogen at a tempera- 

 ture of 12° and a pressure of 762 mm. 



