28o 



METALS. 86. Stannum. 



\ mtneraltsa' Shininis opake, milk-white, with a yellow iih-white 

 ^^' ftreak. 



Gerhard Grund. mineral, p. 25O. 

 Native tin fpar. Schmeifser miner 2. p^ TtjQ, 

 Found near Gieren n ^ile/in^ and in Cornwally of a common 

 form, or in pyramids or o£\ohedrons: texture frequently fi- 

 brous or lamellar: when fufed with borax it produces a milk- 

 white glafs : fpecific gravity 6,007. 



spatosum^ Whitidi or brown, lamellar, diaphantJus, tranfparent or 



fcmitranfparent. 

 Stannum fpatofum. ^yft.nat. xii. 3.^ 131. n 4. 

 Stannum minera fpathiforme. Wall. /yd. 2. p 322; ;;. 5, 

 Brown in ftone. 'bchmeifser mineral. 2. p. ibo 

 Found in Comivally Bohemia, ard Saxony, and is often con- 

 founded with tungilen: it diflolves in acids and melts with 

 confiderahle difficulty, and is fometimes fo hard as to ftrike 

 fire with Heel : its furface can be fcraped with a knife: it is 

 found in m-fl'es and fometimes cryftallized in d uble 4-fided 

 pyramids: colour whitifh, various (hades of brown with often 

 a mixture of red : fpecific gravity 6,900, it contains from 70 

 to 80 percent of tin. 



ligneum^ Pale wood-colour marked with alternate paler ftria^, fibrous 

 in a llellatc manner, flriking fire with IteeJ, feparat- 

 ing into layers, breaking into wedge- form fragments. 



Brunnich Adl- '^^tockh 39. 1778. p. 32O. 



Holzzin. Klaproth fch^Berl nat^y. p.\6(). i 80, 



Wood tin ore. Ktrnjoan miner. 2. p. 198. 



Stream tin. ^chmei/ier mineral, z. p. 161. 



Wood tin. Thcmfon chem. 4. p. 69. 



Found in Corn^jjall, in fmall rounded pieces with the furface 

 commonly rough, or in indeterminate fragments: colour 

 ' light brown with fliades of a lighter colour, having the ap- 



pearance of a piece of knotted wood : texture finey fibrous, 

 with the fibres generally diverging on one lide : it is opake, 

 hard, diflblvmg flowly in acid:, and melting With great dif- 

 ficulty, decrepitating when led hot: ipeciiic gravity fiom 

 5,800, to 7,000. it contains about 65 per cent of tin. 



mmorphttm. Compa6l:, opake, of a common form and dufky colour, 

 with a light grey ftreak. 

 Stannum amorphum. ^yft vat, xii. 3.^. i 3c, ». 3, 

 Stann, aifenico e: ferro. Wall.fyfi. 2. p. 321, «, 4. 

 Common t n ftone. Kiriuan miner. 2 p. 197. 

 Bro'vvn tin llore. %chmeifer miner . 2./. 260. 

 Tinllone. Thorn/on. chem^ 4. p. 68. 



s. 



