46 P. T. Austen—Dinitroparadibrombenzols, 
An analysis of another specimen of triploidite gave P,O, 
3224, FeO 18°65, MnO 42°96, CaO not determined, H,O re 09, 
quartz 1°09. e lime was accidentally lost but calculating 
showing that the iron and manganese vary in different speci- 
mens, the darker colored varieties containing the most iron. 
The name triploidite given to this species, from ¢riplite, and 
etdog form, indicates its resemblance to oe side in physical char- 
acters, and its relation in chemical compositio 
(To be continued.) 
Art. V.—On eo, and their Derivatives ; 
by Dr. P. Townsenv AusTEN, F.C.S., Assistant Prof. of 
Chemistry in Tuten Gotieon: Third paper. 
former papers, I have described the formation of three 
starr panies Caro and proved the a and £ variations 
o be isomeric compounds. With regard to the third, I am 
stil somewhat in doubt. 
The peculiar formation of nitroparadibromaniline by treat- 
ment of alpha dinitroparadibrombenzol with ammonia, has | 
me to make experiments with other reagents, and I have been 
ratified at encountering some quite unexpected phenomena. 
These I shall mention in another paper. 
Beta-dinitroparabromphenol. 
ring a very concentrated alcoholic solution of potassa 
over oh beta-dinitrodibrombenzol, the mass became scarlet-red, 
indicating the formation of a salt. Examination showed, how- 
ever, a8 much of the substance was left unaffected. On heat- 
ing, an action set in, and fine bubbles were formed. On dilut- 
ing with carrie and acidifying with hydrochloric acid, a dark 
rown flocculent mass was obtained, insoluble to any extent in 
alcohol. It was soluble in glacial acetic acid and acetic ether, 
separating in the form of an amorphous powder. As it was 
also soluble in a solution of sodium hydrate, and was pre- 
iesareary therefrom by hydrochloric acid, I take it to be an 
azoxyphenol. 
Various attempts to obtain a good yield of the phenol by 
direct treatment with potassa, or soda, in different amounts a 
solvents, did not meet with success, except on a small 
Although in most cases, the phenol salt was formed, as could 
be discerned from shite red color of the liquid, yet on application 
* Compare this Journal, ITI, ix, 118, and xiii, 95. 
