204 Scientific Intelligence. 
becomes dirty; ammonia gives a violet solution, The author | 
oo that ‘gallein closely resembles hematein, which by 
on with caustic potash yields pyrogallic acid. In like manner, 
i ith reduci 
may again be oxidized to hematin, so gallein may educed 
to gallin, a Npiriaaed crystallized substance, which, when moist: | 
ened with ammonia, again yields gallein. Stuffs mordanted with — 
ina or "fern ic oxide are dyed red by gallein, the color being fF 
intermediate between that of logwood and brazilwood. The cor — : 
3 
Pee | 
hedrons and prisms. It dyes mordanted stuffs like When 
gallein is heated with 20 parts of concentrated sulphuric acid to 
200° C., a new substance is formed, whic ule urified, pre 
sents a bluish-black mass, and which Baeyer terms ceerulein. 
This body dissolves in hot anilin with a magnificent indigo-blue 
color. The s olution, after adding a little acetic acid, dyes wool 
indigo-blue. The formula of cerulein is y reduc 
ion, it passes into rane which dissolves jin ether with 
——e 
4 
oO 
m 
i] 
e 
a) 
pod 
X) 
al 
o 
=, 2. 
es 
See 
a 
j= a 
fae) 
oO 
os 
mm 
ky 
Se 
3 > 
ge. 
fe} 
8. 
Qu 
re 
= 
oO 
4 
z., 
Ps 
4g 
m 
3 
oS. 
ty 
ory 
ou 
son 
| 
no 
a 
ee: 
= 
i= 
45 
23 
> 
5. Decomposition of ieigear ia > by R. mecca 
is one of the pect Hs t minerals to decompose, , altho h 
there have been ocesses given to effect its analysis, t ey 
have generally socomplished the purpose rather unsat: tisfactoriy. 
F. W. Clarke, and published some time ee 
ago in this Journal, wherein potassic di-sulphate and cryolite 
meat, undoubtedly effects the decomposition of the or? but an 
sulphate and cryolite require ired is so great ane t 
chrculiees ap erate in such a form, that I have never been able 
obtain tolerable results Py, this method. 
A number of experiments have cca a me that the ber 
given below is equal, if not superior, to any I have yet he 
in accuracy as well as rapidit a Set manipulation. e pro 
this: place about 0°3 grm. of ina capacious pla 
