44 Schoolcraft on the Copper of Lake Superior. 
of copper ore, upon the shore of lake Superior. I have | 
taken some pains and been at some expence to investigate 
this subject, and to procure specimens of the ore. From 
all I can learn, the vein is a very large and rich one, run- 
ning horizontally into the shore, and the ore is very easily 
detached. And Iam disposedae think, from the specimens 
received, it will yield as great a per centum of metal, as 
similar ores (it is a Malachite) produce at the best European 
mines. 
Iam making up a small box of specimens for you, taken 
from this vicinity. Init you will receive pieces of the ore 
referred to. Unfortunately (for cabinets) itis a very crum- 
bling vein, and the person I employed to visit it, not having 
any taste for such pursuits, handled the specimens without 
proper care, so that the richest pieces are reduced to frag- 
ments. 
I annex a few localities of minerals, in the region of the 
lakes, more particularly of Michigan Territory, which have 
not, I believe, been heretofore noticed. 
HENRY R. SCHOOLCRAFT. 
Professor Silliman, New-Havenw 
[Corr] 
(Communicated for this Journal by permission of the Hon. J. C. Calhoun; 
Secretary of War.) * ’ 
Sault Ste. Marie, July 28th 1823. 
Str.—Having on a former occasion been requested to 
communicate such information as I possessed respecting the 
_ existence of copper upon the shores of lake Superior, I now 
take the liberty of transmitting to you, through the inter- 
vention of Governor Cass, specimens of an ore of that met- 
al, which were taken from a vein recently discovered in the 
region referred to. ; 
The precise locality of this ore, is, the extremity of the 
great peninsula of Keewiiweenon, which stretches from the 
southern shore of the lake towards La Baie Noire, and is 
distant about two hiuantene 1 ty Ps niles fi th) post 
A deepbay washes the eastern cide of this peninsula, which re- 
ceivesa river that has its source near the banks of the lake, and 
running at right angles with the point, nearly ifsulates it 
