Dr. Davy's observations 
362 
entertained, that muriate of ammonia and corrosive sublimate 
are capable of uniting and of forming a double salt,* and to 
prove that similar compounds may be formed with some other 
muriates. 
In the dry way, there appears to be an affinity exercised 
between corrosive sublimate and muriate of ammonia. A 
mixture of the two, in the proportions of 34 of the former, 
and 6.75 by weight of the latter, heated, forms a compound 
more fusible and less volatile than either ingredient separate; 
it may be kept liquid without volatilising by the gentle heat 
of a spirit lamp ; on cooling, it exhibits a very light grey 
translucent mass of a faint pearly lustre; strongly heated, it 
sublimes, and appears to be partially decomposed, as traces of 
calomel and free muriatic acid are found mixed with the sub- 
limate. This compound, formed of one proportion of each in- 
gredient, has more the character of a chemical compound, than 
any other mixture of the two ingredients that I have tried. 
In the moist way, the affinities of corrosive sublimate and 
muriate of ammonia are better marked, and some of the com- 
binations of the two have tolerably well defined qualities. The 
following have the best claim to be considered distinct com- 
binations of any which I have yet made : 
No. 
Water. 
Muriate of 
Ammonia. 
Corrosive 
Sublimate. 
1 
9.00 grs. 
6-75 
34.OO 
2 
9.0° 
3*37 
1 7.OO 
3 
9.00 
3-37 
8.50 
4 
9.00 
10.12 
25-30 
The sal-alembroth of the alchemists was a compound of this kind. 
