150 Mr. Chenevix's Observations and Experiments 
usual way, I found nothing in solution but hyperoxygenized 
muriate of silver ; * and all the hyperoxygenized muriate of alu- 
mina had been decomposed. This salt, however, appears to be 
very deliquescent, and is soluble in alcohol; but I could not 
ascertain the proportion of its principles, because I did not obtain 
it sufficiently free from the simple muriate. 
gth Species . Hyperoxygenized Muriate of Silica. 
I am inclined to think this salt does not really exist. A cur- 
rent of oxygenized muriatic acid, sent through some silica which 
had been precipitated from an acid by ammonia, and collected 
moist from the filter, did not seem to dissolve any portion 
of it. In all barytes and strontia, prepared according to Mr. 
Vauqu elin^s method, a portion of silica from the crucibles is 
attacked, and taken up, by whatever acid those earths may 
afterwards be dissolved in ; and, in all potash of commerce, 
there is some silica ; but I have never perceived that any portion 
of this earth had been dissolved by this acid. 
The very small portion of earth which, in attempts to form 
the different species of this genus of salts, is taken up by acids, 
and the still smaller portion of the salt so formed, which is 
really in the state of hyperoxygenized muriate, render the 
operation so tedious, that I have confined myself to form 
what was necessary to determine their analysis, in such a 
manner as I believe to be nearly accurate. It cannot, theie- 
fore, be expected that I make myself responsible, without a 
right of appeal to further experiments, for the accuracy with 
which the crystalline forms, and other physical properties, 
* This salt shall be particularly mentioned and described in another part of this 
Paper. For the present, it is sufficient to say, that it is very soluble in water; and, m 
that property, as in many others, is totally different from muriate of silver. 
