[ ”8 ] 
to it, by which means the tin was precipitated j this 
precipitate weighed § 2 | y. 
An ounce of tin diflblved in the acid of fait 
being precipitated with a folution of fixed alcali in 
water, well wathed and dried -f* weighed 5 1 f ; fb 
that a precipitate of tin contains only .i of tin, and 
therefore the 5 2 5 7 of precipitate obtained from the 
fiiblimate contain only §252! nearly of tin; this 
being dedudfed from ^ 1 2, the quantity of tin ufed 
in the operation, makes J 9 3 5fj which is the real 
quantity of tin contained in the ^ i6| of Aurum 
mofaicum obtained in this procefs ; therefore J i 
of Aurum mofaicum contains ^ i of tin, and g 
of fulphur; for ^ 9 5 5I of tin is to J i6| of Aurum 
mofaicum, as ^ i of tin is to ^ i _!g. nearly of Aurum 
mofaicum. I'his will be further illuftrated by other 
experiments. 
The tin, which was precipitated by adding a fixed 
alkali to the foluble part of the fublimate, was dif- 
tilled with iron filings and fixed alkali ; but no mer- 
cury was obtained. This fliews that none of the 
mercury unites with the acid of the fal ammoniac. 
There was no volatile alkaline fmell produced by 
the addition of fixed alkali to the foluble part of 
the fublimate, though there were an excefs of it 
added ; which proves that the fal ammoniac was to-' 
tally decompofed, / 
* The vapour, which arifes in diffblving tin in the acid of 
fait, becomes inflammable, when the folution is made in large 
quantity, by means of heat; the like happens alfo with regard 
to lead, 
t This precipitate, if dried with too much heat, takes fire, 
and burns like a dried plant, that contains nitre. 
The 
