176 Mr. J. Davy's Account of some Experiments on the 
ascertain their identity, and their similarity to the native com- 
pound. The colour of all of them is greenish white, like 
that of the native, in a finely divided state. When heated, 
they all afford water, oxygene gas, and a mixture of cuprane 
and brown oxide of copper. 
I have analysed only the submuriat, precipitated from a 
solution of muriat of copper, by a weak solution of potash. 
50 grains of this, well washed and dried, boiled in a solu- 
tion of potash, afforded 36.3 grains of dried brown oxide of 
copper. 
And 20 grains dissolved in nitric acid, and precipitated by 
nitrat of silver, afforded 12.75 grains of dried horn silver. 
These results differ so little from those obtained with the na- 
tive, as fairly to permit the conclusion, that the composition 
of the artificial and native submuriat of copper is the same. 
2, On the Combinations of Tin and Chlorine , &c. 
Tin, like copper, is capable of combining with two different 
proportions of chlorine. The liquor of Libavius, one of the 
combinations, is directly formed by the combustion of the 
metal in chlorine gas ; and the other, I find, may be produced 
by heating together an amalgam of tin and calomel. Thus 
obtained, it is similar to that which may be procured, by eva- 
porating to dryness, the muriat containing the gray oxide of 
tin, and fusing the residue in a close vessel. Both are of a 
gray colour, and of a resinous lustre and fracture, and both 
inflame, like tin itself, when heated in chlorine gas, and are 
converted into the liquor of Libavius by the absorption of a 
fresh portion of chlorine. Hence, as the liquor of Libavius 
