JMineralogy, Geology, &c. 39 
is therefore desirable that the local existence of a mineral so 
essential to the chemist, the bleacher, and the potter, should 
be generally known. ‘The specimens accompanying this 
are— 
No. 1. Compact indurated manganese. Its colour is blue 
or purple black—very heavy, fracture splintry—fine grained 
and dull. It was analyzed by Woodhouse, (Coxes Med. and 
Phil. Register of April 1805, p. 451,) but he was misinform- 
ed as to its locality. It is found in detached masses, from 
the size of a walnut to that of a man’s head, on the head 
waters of Bear creek, Lehigh and Tobyhannah, on the 
Broad Mountain. 
No. 2. Brown frothy manganese. This is comparatively 
of little specific gravity, of a spongy mammillary, and porous 
texture ; it is generally found in the bed of water courses. 
From friction with the finger it receives a high polish ; also 
from the Broad Mountain. 
No. 3. Grey oxid of manganese, with cellular cavities, the 
surfaces of which are covered with minute globules of a 
brilliant lustre, found imbedded in black earthy manganese of 
a greasy feeling. From the Tobyhanna, near the turnpike, 
on the broad mountain, it is sometimes found investing peb- 
bles and cementing them in large masses. 
Very respectfully, 
Your obedient Serv’t, 
ZACH. CIST. 
Wilkesbarre, Pa. May 10th, 1821. 
5. New locality of Beryl. 
Unionville, Chester county, Pa. May 7th. 
TQ PROFESSOR SILLIMAN. 
Dear Sir, 
I will briefly inform you of a locality of beryl which I dis- 
covered eighteen months since, and probably the most ex- 
tensive that has been made public in this country. It is 
found seven miles west of Westchester, New Linn township, 
in what is called the Barrens, a serpentine ridge, extending 
nearly east and west, with some interruptions, through a 
