-INFLAMMABLES. 79. Sulphur. 239 



Found frequently in the neighbourhood of Volcanoes, efpccially 

 where animal recrements have lain dcpofited for a long time, 

 and alfo in other parts, as in fome lakes of Spain and Germany: 

 colour grey of yellow, or if combined with bituminous earths 

 brown, blackifh or black: it burns flowly with a bluifh 

 flame, leaving a rcfiduum in proportion to the earthy matter 

 with which it is mixed. 



hepaticu7tt» Combined with lime or potafs wliich it leaves behind after 



deflagration, fmelling like rotten eggs either fponta- 

 neoully or when acids are poured on it. 



Hepar of fulphur. SchmeiJJer miner. \, p.-^o^. 

 Liver of fulphur. Kir-ivan miner. 2. /•. 83. 

 Sulphuret of potafs. Thomfon chem, i. /.470, 



Found in a ftate of folution in all fulphur waters, and is eaOly 

 deteded by its difagreeable fmell and tafte, and by its readily 

 tarnifhing filver and becoming milky with acids and black with 

 acetite of lead ; it is alio,, though rarely, found in a ilatc of 

 powder at the bottom of lakes : colour brown, not unlike the 

 liver of animals, but becoming green and even white wiicn 

 expofed to the air: its taitc is acid, caullic, and bitter, and 

 it leaves a brown ilain on the flcin ; it converts vegetable blues 

 to green and foon dellroys them : when expofed to a violent 

 heat, the fulphur fublimes, and leaves behind the potafs or 

 foda in a pure ftate. 



Pyrites* Intimately combined with iron, with a metallic fplcndour, 

 of a ft raw-yellow colour and common form. 



Pyrites amorphus, Syst. nat. xii. 3. p. 115. n.^. 



Sulphur informe. Wall, f^fi* 2. p, 226, «. 4, 



Sulphur mundic. Berkenh. outl. />. 258. 



Sulphur pyrites. Sulphureous mundic. Schmeifi, 2. /. 111. 



Pyrites. Kir-ivan mineral, i. p. j^y'^S* 



Sulphat of iron, Thomfon chem. ^. p. 51. 



Found in every part of the globe, occuring in almoft every rock 

 and vein, or forming mafi'es or veins of itfelf : hnrd. frequently 

 mouldering and lofing its metallic fplendour, opake, brittle, 

 melting with difficulty, and fometimes attra<ftcd by the mag* 

 net: frequently containing copper, arfenic, or alumina ^ 

 breaking into indeterminate fragments, of a fome what radi- 

 ated texture or compaft, with a poliflied refiefting furface and 

 gradually paffing into the cryftallized ftue: not foluble io 

 muriatic acid, i ut decompofing when in conta6l with air and 

 moifturc and producing heat and fulphuric acid : like the 

 two following fpecics, ftrikes fire wiih fieel : it confiits of 

 iron ore mineralized by fulphur : fpccifie gravity from 3,440. 

 to 4,789. 



