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THE CofrEH Rock Or LAKE SurfRtoh. This
celcbrated rock Of pure copper, which has caused
so much speculation among the scientific and
Others, arrived in this city on Thursday, on board
of the revenue cutter Erie Capt. Knapp. This
rock has attracted much attention since its dis
coyery about one hundred years since, and has
been described by Colcraft, (Schoolcraft,) Cass,
and others.


This rock has been brought from the shores
Of Lake Superior, through the enterprise and
energy OF MIR. julius Eldred, of Detroit, and is TO
be placed in the rooms Of the National Institute
at Washington. After several visits, and two or
three unsuccessful attempts TO remove 1t, Mr. +.
left Detroit on the 1lth June last, with appara-
tus and machinery, fully determined to bring
away this great mineral curiosity. After almost
Incredible efforts-being compelled to overcome
hill between fifty and sixty feel in height, they
at length reached the lake, having an effective
force OF tWenty-one men to assist in the removal.
1t was shipped on baard of the schooner Algon-
gum, and transported over three hundred miles
to the head Of the Falls Of st. Mary II was
then transferred TO Mackinaw boat, and, after
passing through the canal round the rapids, it
was shipped on board Of the schooner Brewster
for Detroit, where it arrived on the 1th of Oc-
tober. AT Detroit it was taken on board the
revenue cutter and arrived here ,as above stated,
in charge of Mr.. Eldred. We understand that
~ 40 ~ ue transferred 10 tne cars to-day, on us
way TO the place of its destination.


Mr.. F.. has presented US with piece Of the
rock, which faxed off in moving. It is pure
native copper, without alloy. And such is its
malleability, that it may be easily hammered
into any shape or form, without heating. Ell


The weight of the rock has never been def
nitely ascertained. 1t has been differently csi-
mated, by Colcrafi, al 5000 pounds, and he gives
it's dimensions at three feet eight inches long,
and three feet four inches broad. DR.. Houghton,
the State geologist for Michigan, who has had
good opportunities for forming a correct estimate,
is the largest specimen of native copper in the
world; and Mr.. Eldred assuredly deserves the
thanks Of the country for his interchangeable and
successful efforts to bring it forth into the civil
lied world.--Bufalo Gazette.