MINERALOGY. zog 



4. With vitriolic acid. Martial vitriol. 

 $>?&. cxxii. 



5. With phlogifton. Martial coal ore. SecTr, 

 clxL 



6. With other fulphurated and arfenicated 

 metals. See thefe in their refpecluve ar- 

 rangements. 



SECT. CCXV. 



Observations on Iro n: 



This metal enters into fo many compofitions, 

 that they cannot all be poflibly enumerated •, it 

 muft therefore fuffice to mention only thofe, in 

 which it makes out the predominant part. This 

 metal is found in animals and vegetables •, and cer- 

 tain iron ores feem to be of fervice to the vegetable 

 kingdom, as is manifeflly feen on the ground 

 round, and under the heaps of loofe (tones laid up 

 in feparating the ore from the rock, at thofe iron 

 mines, where the ores are mixed with limeftone. 



With refpect to ©economical effects, iron is di- 

 vided into cold-fhort, red-fhort, and tough; and 

 the ores into refractory, fufible, and thole that do 

 not want any admixture-, which depends on acci- 

 dental circumftances, and the method of working. 



Although iron is commonly mixed in the diffe- 

 rent kinds of earth, yet it cannot be aflerted with 

 Becher, that iron may be melted out of every 

 earth, by adding only a phlogifton ; fince in that 

 cafe this metal might alfo be got out of Mufcovy 

 glafs, pure quartz, chalk, white tranfparent fluor, 

 &c. which very likely has never yet been done. 



Nature has bellowed on Sweden an immenfe 

 (tore of iron ores-, fo that whole mountains, in 

 Tornea and Lappmark in Lapland, ccnfift folely 



of 



