566 DR ANDERSON’S RESEARCHES ON SOME OF THE 
from it in fusing readily when introduced dry into the water-bath, which opianyl 
does not. Its fusing point is 205°. In all its other properties, however, it is 
quite identical with opianyl. It gives the same purple with sulphuric acid, and 
shews the same relations to solvents. Its analysis gave the following results :— 
Dates 
9-265 ... carbonic acid, and 
4-295 grains of hydrate of opianyl, dried at 212°, gave 
I 
1228 365 water. 




5:955 erains of hydrate of opianyl, dried in vacuo, gave, 
II. ¢ 12840  ... carbonic acid, and 
29055) a. | water: 
Experiment. Calculation. 
SS <a 
I. I. 
Carbon, . 58-83 58°84 Dot 4 WiCeoa 120 
Hydrogen, 5 517 5:42 5-41 Be 11 
Oxygen, . 86-00 35-74 35:48 0, 72 
100-00 100-00 100-00 203 
These numbers correspond with the formula C,, H,,0,+HO. The quantity of 
this substance which I obtained was too small to admit of any detailed examina- 
tion of its chemical relations. 
Opianic Acid.—The fiuid which has deposited opianyl yields, on evaporation, 
a crop of crystals of opianic acid, which are readily purified by solution in water 
or alcohol. Its properties are already so well known, that I have not thought 
it necessary to examine them further; but as the formula given by WoBLER is 
different from the one I have adopted, which is that of Berzetius, the following 
analyses, in which every care was taken to dry the substance thoroughly, may 
be of value as confirming the correction of the latter chemist :— 
11:170 ~~... ~~ earbonie acid, and 
5343 grains of opianic acid, dried at 212°, gave 
I 
27440 ... water. 
9-485 ... carbonic acid, and 
4:528 grains of opianie acid gave 
II. 
2013... water. 




4:883 grains of opianic acid gave 
Ill. < 10:200 ... carbonic acid, and 
2-190 Aes water. 
Experiment. Caleulation. 
i ee —— 
if Te hI 
Carbon, 56-99 57°12 56-96 57:14 C,, 120 
Hydrogen, 5:07 4:93 4:98 4-76 ieee) 
Oxygen, 37-94 37°95 38-06 38°10 jo) ao 
100-00 100-00 100-00 100-00 210 
The opianic acid of the last of these analyses was prepared by the decomposition 
of teropiammon by potash. 

