236 Geology of the Country near Easton, Penn. 
| 8. By Georce W. Carpenter. 
White Beryl. This beautiful Beryl is in well defined, 
regular, hexaedral prisms, (with occasional small modifi- 
cations,) which vary in size from one quarter to one inch 
in diameter, and from one to two inches in length, colour 
white, occasionally yellow and pale green, and several spe- 
eimens which I have collected possess a pure, uniform, and 
rich green; it occurs imbedded in granite, on the old York 
road, five miles from Philadelphia.—Rare. 
Radiated Steatite. This mineral is composed of little 
tufts, or more irregularly grouped. Each of these tufts is 
made up of acicular crystals, or fibres, diverging or radia- 
ting from a centre, exhibiting a silky lustre. It occurs on 
the Wisahi one mile above its confluence with 
on creek, 
Abundant. 
No, 294 Market-street. 
Art. V.—A ‘Sketch of the Geology of the Country near 
Easton, Penn.; with a Catalogue of the Minerals, and 
a Map. By J. Fincu, F. B.S. &e. 
Easton, in Pennsylvania, situated at the confluence of the 
Lehigh and Delaware, is distinguished by the beauty of its 
scenery, and by the varied and extensive views which the 
surrounding country affords. 
It is also interesting in a geological point of view; the 
oldest range of rocks is probably the : 
tenite of Chesnut Hill, which is near four miles in ex- 
tent, in the immediate vicinity of the town. The central 
part of this ridge is composed of feldspar, quartz, and 
hornblende—but these minerals are variously combined. 
Sometimes the hornblende predominates, and the roc! 
passes into hornblende slate; in other parts the rock is 
aa of feldspar and quartz, coloured by epidote and 
orite. 
Sienite forms also a range called the Lehigh Hills, whieh 
run parallel with the Blue Mountains; in a south-east direc- 
tion they extend into Virginia, and terminate at Monticello, 
the residence of Mr. Jefferson. Large quantities of iron 
