7S 
SELECTED ARTICLES. 
marked that some of the combinations of morphia, as the hy- 
drochlorate, and the acid sulphate, were scarcely tinged of a 
blue colour on the addition of the hydrochlorate of the per- 
oxide of iron, especially when this contains an excess of acid. 
In this case, I place the combination suspected to contain 
morphia, on a piece of glass, add a drop of ammonia, and per- 
mit the fluid to evaporate spontaneously; after this the salt of 
iron will act on the morphia. 
To return to pseudo-morphia; this substance, when heated, 
is not volatilized, nor is it entirely fused, as it decomposes as 
it begins to soften; when distilled in a glass retort, it affords 
a little oil, a small quantity of slightly acid water, from which 
potash disengages ammonia, and leaves a voluminous charcoal 
which is totally consumed when heated in the open air, 
I analyzed pseudo-morphia with great care, and repeated 
my experiments several times; in this analysis I was assisted 
by M. Walter, a young, but able and expert chemist. 
The results were: 
Carbon, 52.74 = atoms 54 
Hydrogen, 
Nitrogen, 
Oxygen, 
By calculation: 
Carbon, atom 
Hydrogen, 
Nitrogen, 
Oxygen, 
On referring to the analysis of morphia already given, it 
will be seen how far pseudo-morphia differs from that sub- 
stance. 
Being anxious to ascertain its action on the animal economy, 
I sent a portion to M. Majendie, and also myself administered 
half a gramme to a rabbit, which did not appear to be affected 
by it. 
5.81 
36 
4.08 
2 
37.37 
14 
54 
== 2066.74 = 
53.41 
36 
225.00 
5.81 
2 
117.64 
4.57 
14 
1400.00 
36.19 
