Its ſpecific gravity is 11,352, greater than that of any other of the baſe metals. The nitrous acid perfectly diſſolves it; the muriatic more difficultly; the vitriolic hardly at all, for the vitriol of lead being inſoluble in water incruſts the metal, and prevents its ſolution. After calcination the weakeſt vegetable acids diſſolves it, and acquire a ſweet taſte. The phlogiſton neceſſary to be taken away in order that it may diſſolve may be called 43, which is leſs than that of any other metal. Hence we underſtand why the calx of lead may be reduced with a very minute quantity of inflammable matter. With reſpect to the force wherewith it retains this phlogiſton it occupies the tenth place. It melts at 595 degrees of heat.
PLUMBUM nativum (lead), though many mineralogiſts doubt whether it has ever yet been found. Native.
PLUMBUM (lead), mineralized by vitriolic acid. Vitriol of.
Originating from the decompoſition of Galena. It is rarely met with. It was firſt obſerved by Mr. Monnet. It does not efferveſce with acids. It may be reduced by the blowpipe upon charcoal.
PLUMBUM (lead), mineralized by vitriolic acid and iron.
Exiſting in immenſe quantity in the iſland of Angleſea. It does not reduce with the blowpipe upon charcoal, but melts to a black glaſs[66]. W.
PLUMBUM (lead), mineralized by the acid of phoſphorus. Phoſphorated.
This was diſcovered by Mr. Gahn. It does not efferveſce with acids. It melts upon charcoal with the blowpipe, but is not perfectly reduced.
PLUMBUM (lead), mineralized by the aerial acid. Aerated.
Cronstedt Min. § 185.
It efferveſces with acids, and is readily reduced upon charcoal[67].
PLUMBUM (lead), mineralized by ſulphur. Sulphurated.
Cronstedt Min. § 187.
PLUMBUM (lead), mineralized by ſulphur and ſilver. Galena.
Cronstedt Min. § 188.
PLUMBUM (lead), mineralized ſulphur, with ſilver and iron.
Cronstedt Min. § 189.
PLUMBUM (lead), mineralized by ſulphur, with ſilver and antimony. Radiated.
Cronstedt Min. § 190.