On the Mineralogy of Chester County, Fenn. fyc. 7 



Carbonate of lime, in beautiful arborescent mammilary and 

 botryoidal concretions, in Joshua Pusey's lime quarry. 



Tremolite, in fine acicular crystals, and fibres of a pure snow 

 white color, radiating and diverging, in Brown's quarry. 



Kaolin, an extensive bed of this mineral occurs on Israel 

 Hoope's farm, New Garden township. This substance is 

 extensively employed in the manufacture of porcelain 

 ware. Two manufactories, and the only ones yet estab- 

 lished in this country, are supplied from this locality. 



West Bradford Township. 



Diallage and saussurite, near Worth's tavern, onthe Stras- 

 burg road. 



Chromate of iron, in detached masses, and disintegrated 

 crystals, same locality. 



Epidote, in beautiful hexahedral prisms, with dihedral summits, 

 of a resplendent bottle green color ; the crystals are from 

 one half to three inches in length, and from T \ to £ of an 

 inch in diameter, fully equal in size and beauty to those of 

 the celebrated locality of Arendal in Norway, occurs in 

 primitive hornblende, on Smith's and McMullins farms, ad- 

 joining each other. 



Zeolite, in fascicular groups of minute crystals and fibres, ra- 

 diating from a central point, of a snow white color, and 

 pearly lustre, forming narrow veins in primitive hornblende, 

 on Robert Lambern's farm. 



Chabasie, in rombic crystals, of a reddish brown color, in 

 hornblende associated with zeolite, same locality. 



Silico-calcareous oxide of titanium, in rhomboidal prisms, with 

 dihedral summits, in a gangue of hornblende and feldspar, 

 same locality. 



Blue feldspar, of the lamellar variety, striated on the surface, 

 same locality. 



Mica, in rhomboidal and hexahedral prisms, in granite, one 

 mile north of Sharplesstown, on the Wilmington road. 



Amethyst, of a deep violet color, in hexahedral prisms, with 

 pyramidal terminations, loose in the soil, on George Pass- 

 more's farm. 



Fetid quartz, well characterized, in R. Wood's lime quarry. 



Limpid quartz, in hexahedral prisms, with pyramidal termina- 

 tions, in the lime quarries near the poor house. 



Iserine, in striated cylindrical crystals,, imbedded in quartz., 

 same locality. 



