Tin. 
405 
not saturated with sulphur ; and in this latter circum- 
stance therefore differing from aurum musivum. This 
was confirmed by the following. 
8. Equal parts of the black sulphuret of tin, of sal- am- 
moniac, and of sulphur, were heated as above, and a 
good quantity of fine aurum musivum was obtained. As 
there was more sulphur than necessary, some sulphuret 
of ammonia was sublimed. 
9. Equal parts of cinnabar and black sulphuret of tin 
heated together, gave running mercury and aurum musi- 
vum. Cinnabar consists of sulphur and oxyd of mercu- 
ry, so that the sulphuret of tin in this experiment deprived 
the cinnabar both of its oxygen and sulphur. 
10. Equal parts of tin putty ( suh-oxyd of tin ) and sul- 
phur gave, after much of the excess of sulphur had sub- 
limed off, a black brittle mass, visibly penetrated with 
sulphur, but no aurum musivum. 
11. Some tin putty was calcined with nitre, and thus 
converted into a white oxyd. Of this, 600 grains were 
heated with 400 of sulphur, and the products were, sul- 
phur and sulphureous gas, and aurum musivum. 
12. The oxyd of tin, precipitated from the mu rial of 
soda, and mixed with sulphur, gave the same products as 
the last. 
13. The oxyd of tin by nitric acid, mixed with two- 
thirds of its weight of sulphur, gave the same products as 
the last. 
In examining these experiments it appears that aurum 
musivum may be made simply by heating sulphur and 
-oxyd of tin, but the three last experiments shew that it is 
necessary for the tin to be in a state of high oxygenation. 
Nevertheless, as in these simple processes some of the 
sulphur is converted into sulphureous acid, for the oxy- 
gen of which no other source but the oxyd of tin appears, 
it may be doubted whether the tin remains in the highest 
