Gilpin observer., 1899-07-13
Mining Notes.

''h'hk -No'pr'
During the month of June S2SO0OG
was paid in dividends by the mines of
Utah.
During the month ending June Both,
there was shipped from Black Hawk
depot of the Colorado road $50 cars. or
5,11O tons of ore. representing the ship
ments of smelling ore and tailings.
The American Smelling and Refin-
ing Company has decided to erect an
other stack at the Germania plant at
Salt Lake City. Ore supplies are in
creasing so rapidly that this Is an ais
solute necessity.
The largest producer in Leadville at
present is the Morning Star operated
by leasers who are shipping about lJO
tons of Oxidized ore daily to .tIle Phil
adelphia smelter at Pueblo, The Ran.
some. Lee and Dunkin have also re-
sumed shipments and are sending out
about fifty tons per day. /
According to tthc he Lamar New d
Lode. the terrible mill dust" at the
he Lninur- mfil. which is credited With
causing considerable fatality. is how
satisfactorily disposed Of The writer
visited n chlorinatIon mill at Florence,
Colorado. about II month ago. where
some such contrivance as that ut the
De Lamar mill is badly needed.
A velocity OF 16 feet per Minute of. h
stream of water will wear away clay,
so feet Will move fine sand. 40 feet
per minute will lift coarse sand. 10
feet moves fine gravel: 100 feet moves
pebbles, $40 feet moves cobbles, 400
feet will move rocks q to s inches in
diameter. and GOO feet per minute will
move boulders feet in diameter.
The largest production of manganese
ore reported since 1891 occurred in the
calendar year 1898. according to stats.
ties just completed by the United
States Geological Survey. The war
with Spain caused dimlnution of i'm
pOrtatiOns and the home production
amounted to 1887 long tons, valued at
S129. 1875. an increase Of almost ~ per
cent. over 1897.
IT Is unadvisable to attempt TO work
ore bodies or veins of greater width
than II feet without employing sills
on the floors of levels. owing to the
difficulties encountered when 1t be
comes necessary to stope out to the
floor above. In smaller veins this may
be accomplished by spragging the
posts and In other ways, but in large
veins these methods cannot be sue
cessfully used.
The Independence mine AT Cripple
Creek seems to grow larger with every
month of production. The work of
June shows n very substantial gain in
the ore reserves. The production for
the last month WIS 40 tons, of the
gross value OF S223OOO. an average of
more than S71 per ton. The net profit
on this production was S15J.uOO. which
Is Just about what the company desires
to make each month
No placer mine location can bc made
by single individual which shall cx-
ceed twenty acres In area, and no
claim shall be taken by any association
OF persons greater than 100 acrcs, and
such associations shall not consist of
less than eight individuals. who must
he bona fide locators. No local laws or
regulations of mining districts can re-
strict the size of placer locations to
less than twenty acres. although the To-
Gator Is not compelled to lake that
much.
II Is suggested that when shafts are
sunk through ground which Is not sol.
id enough to afford good support to
the tlmbers by wedgIng. reachers
should be put In every thirty to fifty
feet. These are let into the walls. they
each resting on hitches cut deep
enough to hold. and the timber firmly
wedged. The plates of the SHIFTS rest
on these renchers mt intervals, and they
support the weight OF the several sets
above ns far ns the next reacher. or
at least such weight ns there may be.
This keeps the shaft sets hrmlc In
place. and there IL little danger OF
collapse IIerald-Democrat