<ilbicans. 
“rgentife- 
runii 
METALS. 93. Arfentcum. 
301 
Of a fteel-white colour and Uiftre, hard, emitting wh^ite 
arfcnical vapours before the blowpipe but no iulphur 
flame or vapour. 
nat xii. 3. />. 1 18- a.6, 7. 
Wall fvli mineral. 2. p. 165. ». Oj 7 > °* 
Miflpiekel. JuH mimral. 181. 
Arfeiiical pytires, MarcTue. Kir-w«n miner, l. p 256. 
Found in tornwall, near Dublin in Mand, Bohemia, SileHa, 
Saxony, Germany, &c. generally ddperfed among tin ores m 
granuUtions, of crylfallized in 4-hded double pyramids or 
lf,dedobliqu..ngledpiirTns: colour foinetimes fi very, gray 
or yellowilh .>r iridekcntly variegated when wrnilhed tex- 
ture compatf, fometimes a little ‘P ‘ntery, witn the furlacc 
maikcd with decuffatc grooves or black ramifications, eft.r- 
vefees with nitric acid without heat, and gives an arfcnical 
(mell when ruboed : it confifts of arlenic alloyed with a con- 
f, durable quantiry of iron, but little or no fulphun ipecilic 
gravity from 5,753.10 6,522. 
Of a filvery luftre and very fine granular texture, emitting 
arfcnical vapours before the blowpipe, and when tuled 
with lead leaving a filver bead. 
Argentum arfcircale. Syft. nat. xu. 3 p. 150. »• 7 - 
Argentum arfenico min ■ Wall. /iff. 2. p. 340- «• »0. 
Argentiferous arfenical pyrites. Kirnejan miner 2. p. 257. 
Found in the mines of Saxony, Bohemia, Germany, and Spain, 
maffive, dill'eminatcd or aiicular : colour nearly that of the 
lait. but brighter and more permanent: it burns lyith a 
white flame, and leaves a rcddifh refiduum ; by folution m 
nitro-muriatic acid the filver will be prcciritated : U coiifills 
of arfenic, fulphur, iron, and from i to 10 or 12 per cent, 
of filver: fpecific gravity 4,087, 
