1 59 
and naphthaline , and on a new acid produced. 
cubic inches of carbonic acid, or 153.46 grains, equivalent to 
41.9 grains of carbon, and 25.89 grains of water, equivalent 
to 2.877 grains of hydrogen. Hence 100 grains of the salt 
yielded 
Baryta 
27-57 
- 78 
Sulphuric acid 
30.17 
85.35 
Carbon 
41.90 
118.54 
Hydrogen 
2.877 - 
8.13 
102.517 
In the second numerical column the experimental results are 
repeated, but increased, that baryta might be taken in the 
quantity representing one proportional, hydrogen being unity: 
and it will be seen that they do not differ far from the follow- 
ing theoretical statement. 
Baryta 
1 
proportional 
78 
Sulphuric acid 
2 
ditto - 
- 80 
Carbon 
20 
ditto 
120 
Hydrogen 
8 
ditto 
8 
The quantity of sulphuric acid differs most importantly from 
the theoretical statement, and it probably is that element of 
the salt, in the determination of which most errors are 
involved. The quantity of oxide of copper and of acids 
required to be used in that part of the analysis, may have 
introduced errors, affecting the small quantity of salt em- 
ployed, which when multiplied, as in the deduction of the 
numbers above relative to 100 parts, may have created an 
error of that amount. 
As there is no reason to suppose that during the combina- 
tion of the acid with the baryta any change in its proportions 
