118 
DR. A. W. HOFMANN’S RESEARCHES REGARDING THE 
Percentage-composition. 
II. III. 
Carbon . . 
.... 39-00 
Hydrogen . 
.... 5-70 
Platinum 
. • . , 
24*63 24*66 
The formula 
C 26 H 21 N, H Cl, Pt Cl 
requires the following values : — 
26 equivs. of Carbon . 
22 equivs. of Hydrogen 
1 equiv. of Nitrogen . 
3 equivs. of Clilorine . 
1 equiv. of Platinum . 
1 equiv. of Platinum-salt 
Theory. 

Experiment. 
156-00 
39-27 
39-00 
22-00 
5*54 
5*70 
14*00 
3*53 
106-50 
26*81 
98*68 
24*84 
24*64 
397*18 
100-00 
A substance of exactly the same composition as amylethylaniline may be obtained 
by the action of bromide of amyl upon ethylaniline. 1 was led to prepare this com- 
pound by some ideas which had suggested themselves in a perfectly different line of 
experiments. I wished to ascertain whether the several hydrogen-equivalents in am- 
monia were of the same value, if I may use this expression, or in other words, whe- 
ther it was indifferent which of the three equivalents was replaced by a given radical. 
Supposing that in ammonia 
aH] 
>N, 
chJ 
it is the a hydrogen which is replaced by phenyl, the question arose whether the 
same substance would be formed, for instance, by substituting amyl and ethyl, either 
for h and c, or for c and b. 
I have carefully compared the properties of amylethylaniline, by which name I de- 
signate the compound produced by the action of bromide of ethyl upon amylaniline 
with those of ethylamylaniline obtained by acting with bromide of amyl upon ethyl- 
aniline, and find that these substances comport themselves in every respect perfectly 
alike. 
A last and decisive argument was hoped to be gained from the deportment of the 
salts of these bases, when subjected to the influence of heat. For this purpose the 
hydrobromates were prepared. When distilled, both these salts were split into bro- 
mide of amyl and ethylaniline ; I hence assume that the action of bromide of ethyl 
upon amylaniline, and that of bromide of amyl upon ethylaniline, give rise to the 
formation of exactly the same basic compound. 
