38 Miscellaneous Notices of American 
3d. Laminated mica—this presents itself usually in iarge 
irregular tables, with some inches of surface, but it 
likewise occurs in rhombs, having sides of two or three 
inches in extent, and is in some instances an inch in thick- 
ness 5 it is as transparent as glass. 
4thly. Garnets—both common and precious garnets are 
found diffused among the other materials of the vein, but 
none as yet have come to light in a very perfect state. 
5thly. Chrysobery!—this occurs in various forms; it 
usually presents two, three, or more sides, very perfect 
while the remainder, like the schorl, in the same vein, is dif- 
fused in the same mass that surrounds it. ‘Two or more of 
the perfect sides of a crystal are usually striated, sometimes 
parallel to its edge, but frequently the strie diverge from 
a line, drawn through the plane of one of the sides, at an 
angle of about forty five degrees. It is of a greenish yellow 
colour and is translucent. 
6thly. Prismatic mica—this has been very recently dis- 
covered ; it is beautifully transparent, and its delicate fila- 
ments strongly resemble those of the amianthus. 
1 shall do myself the pleasure of forwarding to you, by 
the first convenient opportunity, specimens of the above 
minerals. 
Yours, &c. 
JOHN H. STEEL. 
Remarks. 
We have seen some specimens of the chrysobery], for- 
warded by Dr. Steel. They appear extremely like those 
of Haddam. Col. Gibbs, who has seen a full suite of the 
Saratoga specimens, concurs with Dr. Steel in the opinion 
that they are genuine.— Editor. 
4. New Locality of Manganese. 
TO PROFESSOR SILLIMAN. 
Sir, 
I do not find noticed among the localities of manganese 
in the United States, that of this neighbourhood. During 
the late war, this article was at an extravagant advance ; it 
