Geology of the Country near Easton, Penn. 939 
Chromate of Iron, in octaedral crystals. 
Sslico-Cale. Ox. Tita 
In the Steatite of Chesnut Hill. 
Calcareous Spar, flesh-coloured. — 
lagnesian Carbonate of Lime, compact and crystallized. 
Brucite, or Chondrodite, crystallized in carbonate of lime, 
about one hundred and fifty yards de Bae Wolfe’s quar- 
Ty, on the opposite shore of the Dela 
Zircon, eaecsed * in tale, in four sided prisms, termina- 
ted by a ed 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 td found in three different 
localities, but are not very abun 
Mica, lamellar and crystallised i in ‘pris ms 
Nephrite, in large masses; colour ereenish white; frac- 
ture splintery and dull; translucent; very difficult to break. 
Saussurite, bluish green, translucent. 
Schaalstein, i in small prismatic concretions, When i im~ 
Mersed in nitric acid, it falls into gray ee ee 
Tremolite, common, glassy, and fibrous; very 
Amianthus ; compact and ligniform asbestos ae 
' Augie, green, imbedded in flesh coloured t taibcaase of 
im 
Scapolite, i in four-sided prisms, truncated on the edges: 3 
sate various shades of green. 
Hornble 
Actos glassy and fibro 
recious Serpentine, dark ci, various shades of yel- 
: ee ndant. a 
lov and green. 
ommon Serpentin 
Talc, ceyieslssed in n large masses, —* white, silvery 
White, common ; indurated, and sc 
Steatite. A quarry has been recat opened to obtain 
this mineral, which occurs in large quant 
Gra aphite, granular and foliated, iaahedded in tale and 
‘ea in different parts of the range. 
en Carbonate and Red Oxide of Copper, in minute 
Cube and Dodecahedral Iron Pyrites. 
