356 SUPPLEMENT TO DESCRIPTIONS OF SPECIES. 



Sixteen miles from Baltimore, on the Gunpowder. — Graphite. 



Twenty-three miles from B., on the Gunpowder. — Talc. 



Twenty-five miles from B., on the Gunpowder. — Magnetite, sp7iene, 

 pycnite. 



Thirty miles from B., in Montgomery Co., on farm of S. Eliot. — 

 Gold in quartz. 



Eight to twenty miles north of B., in limestone. — Tremolite, augite, 

 pyrite, brown and yellow tourmaline. 



Fifteen miles north of B. — Sky-blue chalcedony in granular lime- 

 stone. 



Eighteen miles north of B., at Scott's mills. — Magnetite, cyanite. 



Bare Hills. — Ghromite, asbcstus, tremolite, talc, hornblende, ser- 

 pentine, chalcedony, meerschaum, baltimorite, chalcopyrite, mag- 

 netite . 



Cape Sable, near Magothy R. — Amber, pyrite, alum slate. 



Carroll Co. — Xear Sykesville, Liberty Mines, gold, magnetite, 

 pyrite [octahedrons), cTicdcopyrite, linneeite (carrollite) ; at Patapsco 

 Mines, near Finksburg, bornite, rnedachite, siegenite, linnceite, reming- 

 tonite, magnetite, clmlcopyrite ; at Mineral Hill mine, bornite, chalco- 

 pyrite, ore of nickel [see above), gold, magnetite. 



Cecil Co., north part. — Ghromite in serpentine. 



Cooptown, Harford Co. — Olive-colored tourmaline, diallage, talc of 

 green, blue, and rose colors, Ivniform asbcstus, chromite, serpentine. 



Deer Creek. — Magnetite ! in chlorite slate. 



Frederick Co. — Old Liberty mine, near Liberty Town, black cop- 

 per, malachite, chalcocite, specular iron ; at Dollyhyde mine, bornite, 

 chalcopyrite, pyrite, argentiferous galenite in dolomite. 



Montgomery Co. — Oxide of manganese. 



Somerset and Worcester Cos., north part. — Bog-iron ore, vivi- 

 anite. 



St. Mart's River. — Gypsum! in clay. 



Pylesville, Harford Co. — Asbestus mine. 



VIRGINIA, WEST VIRGIXIA, AXD DISTRICT OF COLUMBIA. 



Albemarle Co., a little west of the Green Mts.— Steatite, graphite, 

 galenite. 



Amherst Co. — Along the west base of Buffalo Ridge, copper ores ; 

 on X. W. slope of Friar Mtn., allanite, magnetite, zircon, sipylite. 



Augusta Co. — At Weyer's (or Weir's) cave, sixteen miles north- 

 east of Staunton, and eighty -one miles northwest of Richmond, cal- 

 cite, stalactites. 



Buckingham Co. — Gold at Garnett and Mo^eley mines, also, pyrite, 

 pyrrhotite, calcite, garnet ; at Eldridge mine (now London and Vir- 

 ginia mine?) near by, and the Buckingham mines near Maysville, gold, 

 auriferous pyrite, chalcopyrite, tennantite, barite ; cyanite, tourmaline, 

 actinolite. 



Chesterfield Co. — Xear this and Richmond Co., bituminous coal, 

 native coke. 



Culpepper Co., on Rapidan River.— Gold, pyrite. 



Franklin Co.— Grayish steatite. 



Fauquier Co., Barnett's mills. — Asbestus, gold mines, barite, cal- 

 cite. 



