Geology of the Country near Easton, Penn. 239 
Chromate of Iron, ia octaedral crystals. 
Stlico-Calc. Ox. Titanium. 
In the Steatite of Chesnut Hill. 
Calcareous Spar, flesh-coloured. 
Magnesian Carbonate of Lime, compact and crystallized. 
Brucite, or Chondrodite, crystallized in carbonate of lime, 
about one hundred and fifty yards above Mr. Wolfe’s quar- 
ry, on the opposite shore of the Delaware. 
Zircon, imbedded in talc, in four sided prisms, termina- 
ted by a four-sided pyramid at each end; the crystals vary 
in length, from one sixth of an inch to two inches, and in 
breadth from one tenth to one half of an inch: colour, clove 
brown. These crystals have been found in three different 
localities, but are not very abundant. 
/Mica, lamellar and crystallized in prisms. 
Nephrite, in large masses; colour greenish white; frac- 
ture splintery and dull; translucent; very difficult to break. 
Saussurite, bluish green, translucent. 
Schaalstezn, in small prismatic concretions. When im- 
mersed in nitric acid, it falls into grains. 
Tremolite, common, glassy, and fibrous; very abundant. 
Amianthus ; compact and ligniform asbestos. 
Alugite, green, imbedded in flesh coloured carbonate of 
lime. 
Scapolite, in four-sided: prisms, truncated on the edges‘ 
Coccolite, various shades of green. 
Hornblende. 
Actynolite, glassy and fibrous. 
Precious Serpentine, dark green, various shades of yel- 
low and green. 
Common Serpentine. 
Talc, crystallized in large masses, green, white, silvery 
white, common ; indurated, and scaly. : 
Steatite. A quarry has been recently opened to obtain 
this mineral, which occurs in large quantities. 
Graphite, granular and foliated, imbedded in tale and 
tremolite, in different parts of the range. : 
Green Carbonate and Red Oxide of Copper, in minute 
portions. 
Cubic and Dodecahedral Iron Pyrites. 
