2op METALS. 93. Arfenicum. 



Yellow fulphurifed arfenic. SchmeiJJer 2./. 265. 



Orpunent. Thomfon chem. 4. p. 102 



Found in Great Britain^ Hungary , Georgia, Turkey, Sec. maf-. 

 five d'.fleminated, or in fmali imperfeft cryibls; colour 

 vari .»U5 (hades of yellow, with a confiderable waxy luftre and 

 fome tranfpdrency : Ilreak orange yellow, not metallic : 

 texture foliated, with the plates m-iftly curved or undulate, 

 rarely ftriate, a little flexible but noteltftc: effervefccs with 

 hot i.itric acici, burns with a bluifti flame, and bef re the 

 blowpipe evaporates leaving behind a fmall portion of earth: 

 fpeciiic gravity 3,048. to 31521. 



Sandaraca. Somewhat ponderous, red with an orange-yellow ftreak, 

 in Itrai^ht foiiati^ns, nnelting tafiiy betore the blow- 

 pipe burning with a blue flame and white arfenical 

 vapours. 



Arfenicum rubrpm. Syli. nai^ xii. 3. p. \ 17. «. 4. 



Arfenicum ruhrum. Wall Jyst. 2. p. 163. n. 4, 



RealiJar, Kirnj:an m'tn 2, p. '6\, 



Ru^y arfenic. Schmei£er mine .2, p. 267. 



Realgar. Thom/on chem. /^. p 102, 



Fcu"d in Sicily, Naples, Hungary. Bohemia, China, Japa?'., <1'C> 

 m fhve, dilleminated, fupetficid!, or cryftailizeJ in fmall 

 acutantled quadringular or acicular prifms : colour at-rora- 

 xtd, ruby, Icarlet, crimfon, or bl' oc. red, often variegated 

 with yellow tr^iccs : texture lamellar, with the foliations a 

 little flexible and fo (oi^ as to be cut with a kn fe, and fre- 

 quently exhibiting a brilliant luftre : flreak yellowifli-ied, 

 po-. der fcarlet: in nitric acid it lofes its colour : fptcific 

 gravity 3,338. 



sulphurafum Hardy bluifh-grey with metallic luftre, betore the blow- 

 pipe emitting white arfenical vapours and blue ful- 

 phurous flames. 



Arfenic. cincreo-coerules, Sy^. naf, xii. 3. p, 1 18. n, 5. 



Ar{ nic. cinerco-coerules. Walh/yji. 2. p. 167, n. 8. 



"White mundic, White pyrites, Marcafite. Berk» fyrt, 



Pvritical arfenical ore. Schmei/ser mineral, p^ 268. 



Arfenical pyrites. Tbomfon chem. 4 p \0\. 



Found in various parts of Great-Britain^ Germany, Sivederr, 

 Bohemia, iiaxonyj &c in irregular ni :fles, difT^mmated, in- 

 vetting, or cryftallixed in cubes or 4 fided prifms: colour 

 grfyilh whit , often a little variegated: texture uneven, 

 fometimes granular, fometimes lamellar or radiate: when 

 rubbed it gives the odour of garlic: fpecific gravity 6,522. 

 contains arfenic 53,0. iron 19,7, fulphur 15,3. filica i2,0o 

 Fau^uelin, 



