upon oxygenized mid hyperoxygen ized muriatic Acid, &c. 133 
pitated, by nitrate of silver, the 50 cubic inches of liquor, which 
had become simple muriatic acid, and obtained 38,3 grains of 
muriate of silver. But, by experiments, I found that 38,3 of mu- 
riate of silver contain 65 of muriatic acid. Therefore, 65 of 
muriatic acid combine with 15 cubic inches* ( = 8 grains) of 
oxygen, to form 73 of oxygenized muriatic acid. But 73 : 8 : : 
100 : 11, or nearly. For this difference, however, it may be 
easy to account. Perhaps Mr. Berthollet’s 50 cubic inches 
of oxygenized muriatic acid, contained originally a little simple 
muriatic acid; and he says besides, that he suspects all the 
oxygen was not disengaged. This indeed is most probable ; and 
I am happy that I can reconcile the proportions which I have 
found, to the opinion of so skilful a chemist. 
Mr. Cruikshank likewise, in his additional Observations 
upon Hydrocarbonates, has stated that 2,3 parts of oxygenized 
muriatic acid contain 1 of oxygen, or about 43,5 per cent. But 
this able chemist, to whom we are indebted for the discovery of 
the gaseous oxide of carbone, procured his oxygenized muriatic 
acid by a peculiar method, which I shall notice, in speaking of 
the action of acids upon hyperoxygenized muriate of potash. 
The substance he obtained was, in fact, not oxygenized muriatic 
add gas, but a mixture of that gas with hyperoxygenized mu- 
riatic acid. I have not the smallest doubt of the accuracy of his 
statement ; but, being the proportion of a mixture, it in no way 
contradicts either of those I have determined in this Paper. 
Before I dismiss this part of the subject, I wish to anticipate 
an objection, founded upon an observation of Mr. Bertkollet, 
which may be made to the above experiments. He says, that 
when the alkaline solution is very concentrate, an effervescence 
* Mr, Berthollet’s proportions are in the old French weights and measures, 
