JACKSON AND KOCH. TRIBROMDINITROBENZOL. 135 



t'lty of our substance. Many of its other properties also coiucided with 

 those given for symmetrical diuitroresorciue. It formed vitreous yellow- 

 ish prisms apparently belonging to the monoclinic system when crystal- 

 lized from acetic ester, but crystallized from alcohol in the spear-head 

 forms, which were obtained by Typke from sublimation. The sodium 

 salt was orange-red, the ammonium salt yellow prisms, the silver salt a 

 red precipitate which soon turned brown. The acid barium salt con- 

 sisted of rather thick yellow needles. We did not succeed in getting 

 the carmine red neutral barium salt. The free phenol decomposes 

 carbonates. 



