METALS. Sy. Plumbum. 
283 
'Htosum. 
'■yaliiti/m. 
A 
tvum. 
Shinin-^ externally and internally, foft, white, decrepi- 
tating ill the fire, tffervefeing with acids, generally in 
the iWm pf cryftals, ,, 
Plumb, fragm. fpaloL Syff. nat. xil. 3./. 135. «- 9. 
Plum'-mm Upidcum. Wall. /nft. P- • 
Wilke lead ore. KirvJan mineral. U />. 203. 
White carbonate of lead. 4 ’ hmeijjer 2. p. 172. 
Carbonat of lead. Ihnmfrn (hm. 4 />. 74 - 
CarSnnate of lead. So^iverhy min. t ^ 9 > 9 ^> 9 '; , . „ , 
kund in various parts of and Ireland, in Burgandy, 
Jufirla, SaxoM, Hungarf, See. rarely m a globular °r 
]n fTin or difl'eminated, bm moft commonly cr) ft..lliZwd in 
rcftangular 8 fided prifms with oblufe pyramids van ully 
runcated, or in tables or various iorms: colour fihxry or 
white with fon, crimes a filky lullre or tinged vv'th 
brown, greeiiUh or yellowidi ; texture lamellar or conchoidal, 
ot lbe ciwltak often fibrous : it is foft enough to be cut with 
a knife, and is Ibluble in fat oils: when heated u decrepitate.-, 
then turns yellow and afterwards red : before the blo^'pipe U 
is quickly reduced, and blackens with fulphurated volatile 
alkali: fpcci'fic gravity from 6,250. to 6,920- contains oxj e 
of lead 82 carbqnic acid 16. KLproth. 
"T'r-infnarent effervefeing v.-iiii nitric acid, foft, decrepi- 
^ ta^rg o’u red hot coals, of a gtalfy lultrc, in the form 
Mu-o-carbonat of had. Thomfin chtm. 4. p, 75 - 
the Barx,\T. 
primitive foira of which is a cube, olten lengthened, with the 
idges generally truncate and replaced by imall planes, co- 
1 ^ tv a clear tranfpirent white to a pale ftraw yellow, 
wWr Sr m ch exce!.ding that of the lift; texture glally, 
eftmb it tl-t of precious ftonesc k ts foft enough to be 
fmatched'by carbonate of lead : ipecthe gravity 6,06;. con- 
tains oxyde of lead 85. muriatic acid 8, carbonic acid 6. 
Chenevix. 
Yellow in the form of cryfials foft, decrepitating before 
the blowpipe, foluble in muriatic and lulphuric acids 
and uivin.o a blue colour to hot fulphunc acid. 
Yellow molybdenated lead ore. Kir^am.p. zm. 
Yellow lead orc. Schmetjjer niimr. 2. 1 8 j. 
Moly bdat of lead . 7 hornjon chan, ^. p- 7 «- 
u' t „ rhp lead hill in Sect laud, in Cannthza, Briimv, Bur- 
N n 2 
