165 
MR. BRODIE ON THE CHEMICAL 
NATURE OF A WAX 
FROM CHINA. 
These analyses give in parts per cent.— 
I. 
II. 
III. 
Carbon .... 79'26 
79*04 
78*70 
Hydrogen . . . 12*81 
13*07 
13*12 
Oxygen .... 7‘93 
7*89 
8*18 
100*00 
100*00 
100*00 
The formula C54 H54 O4 requires 
C54 
. . 79*02 
H54 . . 
. . 13*17 
O4 . . 
. . 7-81 
10000 
I prepared the silver salt of this acid. 
I. 0'656 grm. of substance gave 0*1335 silver. 
II. 0*6635 grm. of substance gave 0*1355 silver, 
which gives in 100 parts — 
I. 
11 . 
Silver . . . 
. 20*35 
20*42 
I. 0*4675 grm. of the salt gave 
1*072 CO2 and 0*431 HO. 
II. 0*4655 grm. of the salt gave 1*0767 CO2 
and 0*4295 HO, 
which give per cent. 
I. 
II. 
Carbon . . . 
. . 62*53 
63*08 
Hydrogen . . 
. . 10*24 
10*25 
Oxygen and silver 
. 27*23 
26*67 
100*00 
100*00 
The formula C54 H53 03+Ag0 requires 
C54 
. 62*66 
H53 . . . 
. 10*25 
O4 . . . 
6*19 
Ag . . . 
. 20*90 
100*00 
There is a difference between the calculated and found amount of silver of about 
0*5 per cent, which I cannot doubt arises from traces of cerotin still adhering to the 
acid, notwithstanding all the pains I took to wash out the salt ; for I found that the 
amount of silver increased with the purification of the acid by crystallization, even 
after I could find not the slightest variation in the melting-point. The silver salt 
made from an acid which was a part of the same original preparation as the above 
and of exactly the same melting-point, but which had not been so often crystallized, 
gave in two determinations 20*07 and 20*09 per cent, silver. It will be seen that the 
formula I have given for the acid is confirmed by the analysis of the acid obtained 
from distillation of the wax. 
