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fufpended in the tube ; this liquor abforbed hepatic air at its 

 upper furface, and therefore mounted in the tube. No dif- 

 coloration was perceived until a bubble of atmofpheric air 

 ruflied through the liquor to fupply the vacuum in the phial. 

 The liquor then immediately became black. 



We know that hepatic air is decompofed by vital air, and 

 fulphur is precipitated. May not this fulphur, thus fet at liberty, 

 unite with the lead (reduced in part by the inflammable air of 

 the elaftic fluid) and thus form a kind of galena in the humid 

 way ? 



Lime water, added to a folution of fugar of lead, firft pro- 

 duces a precipitate, which it afterwards rediflTolves : On flanding, 

 laminated cryftals of an olive colour are formed. 



