Technical Chemistry. 417 
Salvétat, have lately given a more particular account of this coloring 
it; chromic acid precipitates it from its aqueous solutions without decom- 
I 
found that sulphid or ammonium is also without action upon it. It is 
it, forming a dirty purple-colored solution from which it is precipitated 
unchanged by water. ith alkaline solutions, it changes to a deep color 
Somewhat similar to indigo: but acids restore it to its original color. 
The color of aniline green is much enlivened by the presence-of an excess 
of acid; but, unfortunately, as soon as this acid is removed, it passes 
back to its normal color 
The bases tolzidine, xylidine, and eumidine yield coloring matters un- 
der the influence of oxydizing nts; and also when submitted to the 
action of reducible chlorids at high temperatures, analogous to those ob- 
ned from aniline under similar circumstances; but the results generally 
4re not so good, the color of the products becoming tinged with brown 
4s the bases get higher in the series. 
Nitroso-Phenyline.—This remarkable body is obtained by the action of 
hascent hydrogen on an alcoholic solution of di-nitro-benzole. It is re 
Tesented by the formula C,H,N,0. This body is almost insoluble in 
Water, but soluble in acids, and in alcohol, producing crimson-colored 
Jour. Sct.—Seconp Serres, Vou. XXXII, No. 96.—Nov., 1861. 
33 
