3 
j 
4 
3 
Chemistry. 413 
II, CHEMISTRY. 
On Anilin dyes—Hormann has made the unexpected observation 
tas chemically pure anilin does not yield coloring matters with oxydiz- 
ing agents. The same is true of pure toluidin. On the other hand, a 
eats oN;, HCl+-3C, ,H,N=C,,H,,(C,2H,),N,, HCI+3NH,. 
The free base is a white amorphous substance: the chlorhydrate has a 
bluish-brown color and dissolves in alcohol with a magnificent blue, The 
author describes several other salts, all of which are uniacid. Reducing 
agents convert triphenyl-rosaniline into triphenyl-leucaniline, which has 
the formula C,.H,(C,;2H,),N,. The iodids of methyl, ethyl’ si 
cations on the nature of anilin-green, anilin-violet and azulin enone 
Seies vii, 25. 
v the constitution of American Petroleem.—Pxtovuze and We 
have studied the oil obtained at present in very large quantities in Penn- 
sylvania, and find that it sees essentially of Domciogee of marsh-gas, 
e lowest term of the series obtained being hydruret of butyl, C,H,., 
which boils at a little pent 0° C., while the highest term tay studied ce 
CecHes e authors have obtained from t ts the 
ponding “ghiseaa and in many cases the alcohols. The 6° msde i it 
aban that paraffin is a mixture of still higher terms in the 
imilar results have been obtained by Schorlemmer, vee awe finds 
nzol and toluol in the American oils, while Pelouze and Cahours expli- 
citly deny the presence of these substances—Comptes Rendus, lvii, 62. , 
W. G. 
- On Cesium, separation from Rubidium.—Bunsex (Pogg. Ann 
Nias 1) has made further memes on gr rare element. He could 
not apply Allen’s method to the prepara compounds 
because of the small quantity of the a obtainable from the sources 
at his command. He discovered that caesium could be separated from 
rubidium by another plan, which is as follows: In a Gears of pure 
RbCl and CsCl the Cl is ‘determined, and from its amount that of Rb 
is calculated. The chlorids are acnyerted into carbonates, and to the 
latter salts a little more tartatie acid is added than is necessary to pro- 
duce neutral tartrate of cxsium and bitartrate of rubidium. The mixture 
dried and_ pulverized is brought upon a funnel whose neck is stopped by 
a small filter, and the whole is placed in an atmosphere saturated with 
moisture. The neutral czsium salt deliquesces and passes the filter while 
the acid rubidium salt remains behind. 
