The daily union. [volume] (Washington [D.C.]) 1845-1857, 1845-05-22

specifically of conglomerate with occasional trap
dikes presenting themselves in the district running
nearly parallel with the coast in southwest cirec-
ton, and that although none is visible IN the vicn
glomerate rises into slight elevation or SWELL close
at hand of some 10 or II feet, suicient ndcaiion
to closo observer that underlying trap dixie Is
slightly elevated in position.
Observation satisfied me that our men found most
Of these bouIders within small space, and opposite
a family marked crevice in the conglomerate, hav-
ing the same general bearing a. most of tho spar
veins, in which traces Of copper have been found in
the whole mineral district--or south $50 west.
As the regulations under which the mining dis
trct is placed deprive me Of the right to explore
or mine for my personal benefit, where lease has
been already granted by the War Department, as
in the present instance, compromising an area of
three miles square around US, prevailed on Mr..
Hays, the agent of the Pittsburgh Company, under
whose control this location is placed, to employ
some Of his men few days, according to my
directions. In two or three days some bouldcrs OF
black oxide were found in the crevices, presenting
angles less worn or rounded than those previously
found in the gravel stratum. This regarded, az a
very satisfactory indication.
Soon after, on the 25th of November, we found
vein of black orde of "copper" at the depth OF about
eight feet, compact and well characterized, aver
aging fourteen inches IN width. lhis regaroea as
most satisfactory result in geological as well as
in every other point of view in which the subject
presented itself. After little further excavation
along the creyce the vein showed itself within two
feet Of the surface-the termination of space OF
some twenty feet from which the boulders first dis
covered amounting in all TO six or eight tons, were
anciently driven. This vein, in its most elevated
position has been traced some twenty feet to point
where il sinks or pitches although the crevice con-
tnues onward through the conglomerate. Some
FIVE or six tons Of orc have Eeen- taken from the
vein disclosing greater degree OF density and COM
pactness, inch by inch, as we progress downward,
with every indication of its uninterrupted contin-
uance. The work has been temporarily suspended.
The ore is the black or peroxide of "copper" hnged
with the carbonates and is of dark brown color,
sometimes almost black, with occasionally traces
of metallic lusire. The specific gravity varies from
tour fraction over seven, and VIII prooapiy yiela
between sixty and seventy per centrum copper4
some Of the boulders have been found weighing
$50 pounds
/ regard it as the very finest ore of copper that
has ever presented itself the enterprise or indus
try of man.
This vein ranges nearly with the spar vein in
which the sllicate of copper is found on the eastern
arm Of land forming the harbor, and from which
branches are supposed TO have been traced along
some portions of the bed Of the harbor and crossing
the trap dike ranges at small angle with aperpen-
dicuar. regard discovery so satisfactory in its
Indications as the best demonstration of the nature
and character of the district of country around us,
for mining purposes, that has been could possibly
have been made, and as solving the question which
Dr. Houghton, in his observations on the subject,
presented to the public mind.
FoRr WILKINS, LAKE SUPERIoR,
M January l, 1916.