1819.) = new Combinations of Oxygen and Acids. 5 
acid, and the liquor is decanted off. It will be found to contain 
all the oxygen coming from the two portions of deutoxide of 
barium on which the operation was performed. 
It is worthy of remark, that the same acid may be oxygenized 
several times repeatedly by the same process. I have oxyge- 
nized it as often as seven times. 
Do these sorts of combinations take place in definite or 
indefinite proportions? This must be ascertained by future 
experiments. 
Be this as it may, when an excess of barytes water is poured 
into oxygenized nitric or muriatic acid, or into these acids super- 
oxygenized, a crystalline precipitate of deutoxide of barium falls. 
This precipitate is very abundant; it has the form of pearly 
scales, and is but little soluble in water. This liquid, at the tem- 
perature of 50°, decomposes it, and converts it into oxygen gas 
and barytes, or protoxide of barium. 
Strontian and lime are susceptible of being superoxygenized, 
as well as barytes, by the superoxygenized acids. The hydrate 
of deutoxide of strontian resembles considerably that of barium: 
that of lime is in finer plates. 
Probably by the same method I shall be able to oxygenize the 
earths, or, at least, some of them; and I shall be able to super- 
oxydize a great many metallic oxides. To accomplish this, I 
propose to put an excess-of base with the acid, or to dissolve 
the base in the acid, and then to precipitate it by potash; or I 
shall put the oxygenized muriates in contact with oxide of silver, 
which, seizing on the muriatic acid, will, in that way, favour the 
combination of the oxygen with the oxide which it is wished to 
superoxygenize. 
ARTICLE II. 
New Experiments on the Ox genized Acids and Oxides.* 
By M. L. J. Thenard. 
I ANNOUNCED in my preceding observations, that mumiatic, 
nitric acids, &c. were susceptible of bemg oxygenated several 
times. It was of importance to be able to determine the quan- 
tity of oxygen which they were capable of taking up. . This I 
have done with regard to muriatic acid, as I shall state briefly. 
I took liquid munatic acid of such a degree of strength that 
when combined with barytes, a solution was produced, which, 
when slightly evaporated, deposited crystals of mumate of 
barytes. I saturated this acid with deutoxide of barium reduced 
into a soft paste by water and trituration. I then precipitated 
the barytes from the liquid by adding the requisite quantity of 
* Translated from the Ann. de Chim, et Phys, ix. 51. (Sept. 1818.) 
