METALIS. 87. Plumbum. 285 



alnjernicum, Greenifh-yellow, without luftre, bubbling and emitting 



arfenical fumes before the blowpipe, and cryftallizing 

 on cooling. 



Fourcroy atinal de chem.. 2. 17^9* p- 29. 



Arfcnico-phofphorated lead. Kir^^ an mineral. 2. p. 210, 



Arfenico-phofphac of lead. Thprnfon chem. \ p. 80. 



Found at Juvergne n f^ra'xe, in mafles, or cr ftallized in 

 fmall 6 fid'd prifms: colour yellowifh grcn of various 

 fhades : fraftu re fibrous, {Iriatcd, or conch- i ?.l : before the 

 blowpipe it melts eafily with efFervelcence, emitting a white 

 imoke and arfenicai fmell : fpecific gravity 6,846 contains 

 arfeniate of lead 65, phofphate of lead 27, phofphate of iron 

 5, water 3. Fcurcroy, 



arsenicatum Without luftre, melting before the blowpipe but not cryf- 

 tallizing on cooling, emitting arfenical fumes when 

 , heated to whitenefs and leaving a bead of lead. 



Prouft. Journ de Phyf. 30. p. 394. 



Arfenicated lead ore. Ki'^n.van miner. 2 /. 209. 



Arfeniat of lead. Thomfon chejn. 4 p. 80. 



Found in the mines of Bingandy anc AndaluPi.ay in quartz or 

 feldfoar, and in fmall maflet> : colour pale green or yellowilh- 

 green, with a waxy luftre : when thrown on hot coals it 

 eafily becomes white, 



duplex* Without luftre, before the blowpipe emitting arfenical and 



fulphuric flame aiid vapours. 

 Bage 'Journ. de phyj. 17892.^.53. 



Found at Awvergne in France^ snd confifls of oxyde of lead cora- 

 ' bined with the arfenical and falpLnric acids. 



'Vitriolatum WhitiHi, without luftre, quite fixed, eafily melting before 

 the blowpipe without decrepitation or eftcrvefcence, 

 not effervefcing with acids. ' 



Gadolin chem. annal 1778. \.p. 147. 



Prouji Journ de phyf. 1787 I ^-394. 



Vitriol of lead. Ki'-'wan mineral. 2. p.2\\. 



Vitriolated lead. SchmeiJJer mii.er, z. p. 181. 



Sulphat of lead. Thomfon chem 4. p. 76. 



Found in the lead mines of Strontian in Scotland, in Anglefea and 

 Andalufttty fometimes variouflv modified, but generally iii 

 very minute cryftals, and moftJy above the beds of ga ena 

 from the decompofition of which it feems to originate: co- 

 lour white or grey, more or lefs pellucid : fracfture compaft : 

 it is partly foluble in water, and is foon reduced before the 

 blowpipe: fpecific gravity 6,300, contains oxyde of lead 

 71,0. fulphuric acid 24,8. water 2,0. oxyde of iron i,o» 

 ^laproth. 



