^^gulina. 
^f>rac€a. 
MFTALS. 95. Magnefilim. 305 
Of a fteel-white colour and luftrej emitting rulphiirous 
anfl arfehical vapours and leaving a bead not attrafled 
by the magnet. 
Found in the mine' of Arragon in 'pain, and conlilts of cobalt, 
lulphur and arfeiiic without a vifible mixture of iron. 
95. MAGNESIUM. Dark grev gradually black- 
ening bv expolure to the air, hard, very brittle, 
of a"" granular texture, attraaed bv the magnet 
when reduced to powder, Ipecific gravity ^,000. 
melting with great difficulty, its black oxyde af- 
fuming a green colour which in a very violent 
heat is fufed and converted into a green glafs, 
when fufed with borax producing a deep red 
glafs: when diffiolved in fulphuric .acid leaving a 
black fpongy mafs behind, and forming a red 
precipitate with the addition of foda. 
Manganefe. 
Staining the fingers, of a filver-grey colour with metallic 
luilre, and divergingly foliated texture. 
hape^roufe Alf • acad. 7 olff \,p 25b. 
Native metallic manganefe. Sehmeifstr 2 . p. zp '. .• 
Found in the vallcv of Viedef.os near Lem in the neighbourhood 
ol Foixot\ the Pyrenees, in kidney form muffes: n u. Uightly 
malleable, and not attrafted by the magnet. 
Friable, without luftre or tranfparencv, earthy. 
Ochra magnefim. Sj/i not xii. 3 p 194. 9, 
M 'gnefi.i friahilis. Cronft mx’ieral 114 
In-.urated ear-hv bchte. Knnssun mimr 2 . p 
Found in England, the Pyrenees, tne mines of Franconia, and in 
the mountains ot Siberia, thallive or difleminated, cel- 
lular, porous, pertorat.o, or in various imitative forms : tex- 
ture earthy, rarely imperfedly f 'iMttd : colour blackifh, or 
brown like the brown hamiatiies; pecific gravity before it 
hasablorbed water 3,707. after abforption 3,003. 
Black, friable, floating, mixed dry w-ith a fourth of its 
weight of linfeed oil producing fpontaneotis inflam- 
mation. 
Wad. Kirnvan miner Z. t 293- 
VOL. Vll. — Qi.q 
