12 On the Mineralogy of parts of Mary. Penn. fyc. 



Maryland. — Cecil County. 



Schorl, of a velvet black color, in beautiful cylindrical crystals, 

 disseminated in quartz, near the falls of north east creek. 



Actynolite, of a bottle green color, in compressed acicular 

 crystals, in talc, near Cooptown, Harford county. 



Magnetic oxide of iron, massive, and in octahedral crystals, 

 in chlorite slate, same locality. 



Fibrous talc, of a reddish color, same locality. 



Magnesite. An extensive locality of this valuable mineral, oc- 

 curs at Bare Hill, near Baltimore, and has been extensively 

 employed in the manufacture of Epsom salts ; it is now 

 obtained from Little Britain township, Lancaster county, 

 as before described. 



Bucks County, Penn. 



Magnetic oxide of iron, half a mile above Newport, on the 

 Neshamony creek. This ore was formerly worked, but 

 has been abandoned, in consequence of not producing 

 advantageously. 



Serpentine, having distinct laminae, slightly curved. These 

 pervade the serpentine in spots, and when viewed in direc- 

 tion of the laminae, have a shining and pearly lustre, and 

 when contrasted with the greenish black, dull, and opaque 

 color of the serpentine, have a glistening and metallic ap- 

 pearance, somewhat resembling hypersthene, half a mile 

 below Newport, on Roldman's run. 



Lamellar feldspar, the glassy variety and graphic granite, at 

 Newport. 



Tourmaline, of a rich black color, in eight sided prisms, lon- 

 gitudinally striated, terminated by three sided pyramids, 

 in granite which forms veins in gneiss, at Nevil's academy, 

 near Bustleton. 



Cyanite, of a fine blue color, in flat crystals or blades, in 

 quartz, forming a vein in gneiss, near the same locality. 



Scaly talc, in detached masses, occasionally containing as- 

 bestos, same locality. 



Asbestoid actynolite, in silky fibres and acicular crystals, ra- 

 diating from a centre in beautiful tufts, in detached mas- 

 ses, from one to fifty pounds weight, in a wood, half a 

 mile east of Bustleton. 



Magnesian garnets, massive, of a lamellar structure, on the 

 Penny pack creek, three miles from Bustleton, at the 

 mouth of the Sandy run. 



Black oxide of manganese, in gneiss, same locality. 



