316 PROCEEDINGS OF THE AMERICAN ACADEMY 



bone-black until it melted constant at 115°, when it was dried at 

 100° and analyzed with the following results : — 



I. 0.1897 gr. of the substance gave on combustion 0.2874 gr. 

 of carbonic dioxide and 0.0782 gr. of water. 

 II. 0.1519 gr. of the substance gave according to the method of 

 Carius 0.0985 gr. of argentic bromide. 



Found. 



II. 



27.60 



The substance has therefore been formed from the tribromnitro- 

 resorcine diethylether by the replacement of two atoms of bromine 

 by two of hydrogen, a reaction which is similar in principle to the 

 replacement of the bromine by hydrogen in bromdinitroresorcine 

 diethylether, when treated with a boiling solution of sodic ethylate 

 in alcohol, and to the similar replacements of bromine by hj'drogen 

 in the formation of bromdinitrophenylmalonic ester and related sub- 

 stances from tribromdinitrobenzol and tribromtrinitrobenzol. 



Properties of Bromnitroresorclne Diethylether, 

 C 6 H 2 BrN0 2 (OC 2 H 5 ) 2 . 



The substance crystallizes from hot alcohol in long radiating 

 silky white needles, which melt at 115°, and are soluble in cold 

 alcohol, more freely in hot; freely soluble in cold methyl alcohol; 

 very freely in benzol, chloroform, acetone, glacial acetic acid, or 

 carbonic disulphide; slightly soluble in cold ligroine, much more 

 soluble in hot; essentially insoluble in water. Neither hydrochlo- 

 ric, nitric, nor sulphuric acid seems to have any action on it, and 

 the same is the case with a solution of sodic hydrate. 



