268 Scientific Intelligence. 
The coloring matters obtainable from aniline are numerous. They are 
the following :—Aniline purple, violine, roseine, fuchsine, alpha aniline 
purple, bleu de Paris, nitroso-phenyline, dinitraniline, and nitro-phenyline 
Aniline Purple, generally known as Tyrian Purple, Mauve, Phena- 
mine, Indisine, éc.—It has been known for many years that the hypo- 
chlorites react on aniline and its salts, producing a purple-colored solution; 
in fact, hypochlorites are the distinguishing test for aniline; but nothing 
definite was known of this purple-colored solution, it being simply stated 
that aniline produced, with hypochlorites, a purple-colored liquid, but 
that this color was very fugitive. As many very absurd statements have 
n made respecting the discovery of aniline purple, I will just briefly 
mention how it was that I first became acquainted with it ¢ 
In the early part of 1856, I commenced an investigation on the artifi- 
cial formation of quinine. To obtain this base, I proposed to act on 
: hats with iodid of allyle, so as to form allyle-toluidine, which has 
formula— 
Uyis 
C,H, N=C,,H, 2N, 
thinking it not improbable that, by oxydizing this, I might obtain the 
desired result; thus— 
(CoH, sN)+0, = C,,H.,N,0,4+H,0. 
FY ct. 
Allyle-toluidine. uinin 
e with 
ish 
bichromate of potassa; but, instead of quinine, I obtained a dirty reddish- 
commercial necessity—namely, aniline purple. 
4} . 4 aS 
Ltn acfllowsSi—a 
The method adopted for the prep naline purt . ato 
Solutions of equivalent proportions of sulphate of aniline an beeper p 
0 sa are mixed, and allowed to stand till the reaction is comp 
an nag 
with water until free from sulphate.of potassa. It is then dried. or 
dry product is afterwards digested several times with coal-tar naphtha, 
: be colored 
brown. After this, it is repeatedly boiled with alcohol to extract 2 
coloring matter. This alcoholic solution, when distilled, leaves the ee: 
