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From LAKE SrPERIoR.-E1tract OF q letter iiom
q gentleman at Lake Superior TO his friend in this
city. Iowa City Standard.


EAGLE H,RBoR. Aug. 16, lSii


Since we arrived here we have discovered five or
six veins of copper but have not been able prove
any of them vet All these discoveries have been
made in the course Of small streams, where the
ton Of the water has exposed them. They are all
nearly similar in their mineralosical appearance,
being combination of the native copper, with
quartz, calcareous SPAR or the trap rock Or tho
carbonate or oxide OF copper, 7e have not discov-
cred any. Mr Jackson, the great Geologist OF Bos-
ton, Is with US al present, and is employed by the
company to test the ores that we lave discovered


He he's examined one of our largest and richest
veins, on Eagle River. Ii is Gig hi feet wide al the
place where II wes first opened, and can be traced
for nrariy a mile in the bed Of the stream. His
opinion OF this s that il will justify the expense Of
working, and he supposes that ii may yield lwent;
hve per cent. This is the only vein that he has ex
amined vet, as he has been and now is confined
to his room with severe illness. MIR. Henshaw, OF
Boston, one of the richest stockholders in the
pany, came with him and is at present with Us.
believe tina, the company intend to put all their men
TO work on this vein, and TO prove il thoroughly.


Eagle River is a small stream, not more than ten
or fifteen feet wide al its mou,b, about 6ye miles in
length and is shallow that you can cross il any
where on the rocks that lie in the stream. This
will be hard country 10 prove" and il will re-
ouire time, as we'll large amount OF capita! 10
effect any thing. | think the vein they have con-
Guided 10 work on will prove The others, and if II
proves to be rich, there several others now dis
covered that will prove to be equally So