[ “9 ] 
The foluble part of the fublimate of Aurum 
mofaicum produces cryftals of an irregular form, 
which do not deliquefce in the air like all other falts 
of tin, owing chiefly to their having a lefs portion 
of acid, A drop of the folution of this fublimate, 
cryftallifed on a piece of glafs, and viewed with a 
microfcope, has very much the appearance of the 
cryftals of alum. 
Aurum mofaicum, when well prepared, is of a 
fhining golden colour, has no tafte, and is not fo- 
luble in water. It is not adled on by acids, nor by 
fixed or volatile alkalis dilTolved in water. If melted 
with an equal quantity of fixed alkaline fait of tartar, 
it forms a liver of the colour of gumbouge, which 
is, for the mofl: part, foluble in water, and may be 
precipitated by any acid. 
If Aurum mofaicum be diftilled with iron filings, 
no mercury will be obtained. 
It is well known, that tin deflagrates violently with 
nitre ; therefore it will not feem furprifing, that the 
Aurum mofaicum fhould have that property in a far 
greater degree, it being a compofition of tin and 
fulphur 
Sulphur, combined with metallick fubftances, ren- 
ders them inactive, as we fee in cinnabar, antimony, 
&c. 5 therefore Aurum mofaicum well prepared muft 
be a very unfit medicine for worms, 
Aurum mofaicum is often found to have a very 
rough tafte^ but that is owing to the fait of tin, 
which has not been fufficiently difilpated in the fub- 
limation, and, in that ftate it may efFedtually deftroy 
• May not this fubftance be ufeful in fire-works, as alfo 
fulphurated iron ? 
worms 5 
