MOLECULAR CONSTITUTION OF THE VOLATILE ORGANIC BASES. 
101 
Hydrohromate of EthylaniUne. 
The hydrobromate is extremely soluble in water, but crystallizes on spontaneous 
evaporation of its alcoholic solution in splendid regularly formed tables, of consider- 
able size and perfect beauty. I intend to give the measurement of these crystals in 
a future communication. The analyses of this salt, dried at 100 °, gave the following 
results : — 
I. 0'6412 grm. of hydrobromate gave 0‘5956 grrn. of bromide of silver. 
II. 0'5553 grm. of hydrobromate gave 0’5216 grm. of bromide of silver. 
Percentage of Hydrobromic Acid. 
< ^ 
I. II. 
40-01 40-47 
The formula 
H,,N,HBr 
requires the following values : — 
Theory. Mean of experiment. 
< " > 
1 equiv. of Ethylaniline 121 59-91 
1 equiv. of Hydrobromic Acid . . . . 81 40 09 40 24 
1 equiv. of Hydrobromate of Ethylaniline 202 100-00 
The hydrobromate of ethylaniline when gently heated sublimes, like the corre- 
sponding aniline-salt, in splendid needles, but when subjected to the action of a 
rapidly increasing heat it undergoes a very remarkable decomposition, being rede- 
composed into aniline and bromide of ethyl. On addition of hydrochloric acid to 
the distillate, the aniline dissolves, while the bromide of ethyl collects as a heavy oil 
at the bottom of the vessel. 
C,e H„ N, H Br=C ,2 H, N+C 4 Br 
V ) ^ J I ^ J 
Hydrobromate of Aniline. Bromide of 
Ethylaniline. Ethyl. 
I have in vain tried to split hydrobromate of aniline according to the equation 
C 12 H- N, H Br=H 3 NH-Ci 2 Hg Br 
^ ! t ) 
Hydrobromate of 
Aniline. 
"V" 
Bromide of 
Phenyl. 
This salt sublimes, even when suddenly heated, without any decomposition. 
Platinum- Salt of Ethylaniline. 
I have controled the formula of ethylaniline moreover by the analysis of the 
platinum double salt of this substance. This salt is likewise very soluble, and may 
by this property be distinguished from the corresponding aniline-salt ; on addition of 
a concentrated solution of bichloride of platinum to a concentrated solution of this 
