on some ancient metallic Arms and Utensils. 413 
white sediment; for it threw down nothing but prussiate of 
copper, on adding prussiate of soda; nor was any silver depo- 
sited on immersing in it bright copper wire ; nor was any pre- 
cipitation occasioned by adding muriatic acid, or muriate of 
soda, to the concentrated blue solution. 
(e). The white sediment ( c ) was a light impalpably fine 
powder : it had a little metallic taste : it could not be melted 
with borax by flame with the blow-pipe, but was diffused 
through that salt, and rendered it opaque. 
This sediment dissolved totally, except a little mere dirt, by 
long digestion in muriatic acid, and immediately in this men- 
struum when caloric was applied to make it boil. 
This solution in muriatic acid did not throw down Cassius' 
precipitate on adding to it intro-muriate of gold, but afforded 
a white deposit exactly like that which is made on adding 
nitro-muriateof gold to muriate of tin, made either by boiling 
tin in a large proportion of muriatic acid, or by dissolving 
oxide of tin (made with nitric acid) in muriatic acid. 
The muriatic solution of the white sediment (c), on adding 
prussiate of soda, afforded a precipitate exactly like that which 
appears on adding prussiate of soda to muriate of tin. 
The white sediment (c) being mixed with tartar, upon 
charcoal, the flame of a candle by the blow-pipe was directed 
upon it : by which treatment small silver-like globules were 
made to appear. These globules being collected, were digested 
in the cold, in so small a proportion of muriatic acid as could 
not dissolve the whole of the globules supposing them to be 
tin. They were gradually almost all dissolved, and nitro-mu- 
riate of gold being added, Cassius' precipitate was imme- 
diately deposited. But the metallic globules being dissolved 
by boiling in a large proportion of muriatic acid, no Cassius' 
