15‘2 Mr. Chenevix’s Observations mid Experiments 
salt exposed to heat ; and the remainder I considered as water. 
It was upon results obtained in this manner, that I founded 
many of the proportions I have given in this Paper. 
It is stated in the tables of Bergman, corrected by Dr. 
Pearson, that lime and strontia prefer acetous to arsenic acid. 
But arsenic acid can expel hyperoxygenized muriatic acid from 
its basis, although the acetous cannot act in the same manner ; 
therefore, this order of affinities is erroneous. It was not till 
lately, that we had potash and soda so pure as to be relied 
upon in delicate experiments ; and it is not surprising that we 
find mistakes' with regard to their taking the acid from barytes, 
strontia, and lime. But real potash and soda both precipitate 
even barytes from hyperoxygenized muriatic acid. If ever it 
becomes easy to obtain hyperoxygenized muriate of barytes, we 
may prepare that earth from it in the humid way, and more 
near to purity, than in the method proposed by Vauouelin. 
metallic combinations of muriatic acid, in its 
different states. 
The action of hyperoxygenized muriatic acid upon metals, 
is, as may well be expected, rapid, and without disengagement 
of gas. It appears to dissolve every metal, not excepting gold and 
platina. If the metal be presented to the acid at the moment 
when it is disengaged from the salt, inflammation ensues ; and 
the phenomena of light and heat vary according to the metal ; 
but the salts thus produced are merely muriates. In order to 
form real hyperoxygenized muriates, it is necessary to take the 
metal in its fullest state of oxidizement, and combine it with the 
acid, either by double decomposition, or by passing a current 
of oxygenized muriatic acid gas through the oxide suspended 
