mineralogy. 
20S 
4. With vitriolic acid. Martial vitriol* 
Sed. cxxii. 
5. With phlogifton. Martial coal ore. Sed. 
clxi. 
6. With other fulphurated and arfenicated 
metals. See thefe in their rclpedive ar- 
rangements. 
SECT. CCXV. 
Observations on I r o n; 
This metal enters . into fo many compofition^ 
that they cannot all be pofTibly 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 manifeftly feen on the ground 
round, and under the heaps of loofe ftones laid up 
in feparating the ore from the rock, at thofe iron 
mines, where the ores are mixed with limeftone. 
With refped to oeconomical effeds, iron is di- 
vided into cold-fhort, red-lhort, and tough; and 
the ores into refradory, fufible, and thofe 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 afferted 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 beftowed on Sweden an immenfe 
ftore of iron ores; fo that whole mountains, in 
Tornea and Lapp mark in Lapland, confift folely 
of 
