inflammables. 78. Grapl'iites. 
m 
f'ltimbagp. 
Qari). 
f'ull. 
tgo. 
, vi) b« 
08. graphites. Gonfifimg principally of cp- 
bon, with a little iron and generally a little filjca 
or alumina; when pure burns with a reddift 
flame, emitting beautitul fparks and a fmell or 
fulphur, and leaving little reflduum: J^Iaek, 
opake, very foft, feels lomewhat greafy and 
ftains the fingers, brittle, breaking into indeter- 
minate fragments. 
Of a metallic Inllre, and llaty ftrnaure. 
Molybda:num fubqu.-.mos. Sj/i. u.it. xii. 3.^. xzp l, 
Ferruin corrofum. i'Fali fiit 2. p. 249- ^14. 
Plumbago. ?chee!t /UU. Stockh. 1779. />■ 23?- 
Plumbago. Kitvjan miner, z. p- 66 . 
Black lead. SchmeiJJer mimrul' t- 3°'* 
Plumbago, nomfoa chem e,. p- \ 
Found in different parts of Grr«r.Br;V«fc. particular y near 
Dumfries in Scethnd, at Barro-.’.dale, and h.JhvuA in UmOer^ 
land - in Greenland and various parts of the continent : colour 
b'ackiih or iron grey, hluci(h-grey when cut, with a flight 
metallic luftre ; yields to the impreflion of the nail, and makes 
a black mark on paper; textpre CQn;paft, witii a flue grain, 
and rather a little flexible: it is chiefly uled for making 
black-lead pencils, for blackening flpves, and when mixed 
with a proper proportion of lilica for crucibles; fpecinc gra- 
vity from 1,987. to 2,089. contains when pure, carbox 90, 
ifon 10. Scheele. 
Of a chonchoidal ilruanre, breaking into indeterminate, 
fragments. 
Wiedenm. Berg. Journ. 1789. 1. p 609. 
Klaproth chem.annaL 1790. 1 . p.ze)). 
Found near Schetnniz m Hungary, imbedtkd in thin f.rata or 
veins of black indurated alumina, near fokar-weniza running 
throuah a matrix of opal like a vein, in France ^r^'l Nornva,: 
when expofed to a white heat lofes all us carbon which is 90 
per cent leaving a refiduura of nearly equal parts of alumina 
and oxj’de of iron. 
Deep black internally, making a deep black mark, 
Habel.Schreb. berl.naturf. 10. p. 7 , 
F^nd near Duttnveikr in Nalfon^w, alternating in thm ftrata 
with coals. It is probable that thefe three fpecies might with 
much propriety be reduced to one. 
