constitution of the prussic and other acids , &c. 229 
combustion, and repeated the experiment with an increased 
proportion of it. 
Such was my method of effecting the analysis of the prussic 
acid, and by which as will be seen in the last line of the 
Table, I succeeded in discovering that 0.3442 gr. of it were 
composed as follows : 
Carbon = to that in 0.4389 gr. of carbonic acid, or 0.1 198 
Azote = to the weight of the azote gas collected 0.1401 
Hydrogen = to that in 0.7230 gr. of water - 0.0843 
0.3442 
consequently that 100 grains contain 
Carbon 
34.8 
Azote 
40.7 
Hydrogen 
24-5 
100.0 
Having finished my analytical investigations, I pass on to 
the last divison of my subject which is the following compa- 
rative view of the composition of the prussic, ferruretted chy- 
azic, and sulphuretted chyazic acids, and of their salts, as 
deduced from my analytical experiments, and as inferred 
from the atomic theory. 
I was very well aware of the probability of my placing 
some of my analyses in a very unfavourable light, by con- 
trasting the results obtained by the application of a theory, 
capable of giving the composition of bodies with absolute 
certainty, with those results which I have obtained by prac- 
tical experiments, on a class of bodies hitherto little examined, 
