El Paso daily herald. (El Paso, Tex.) 1881-1901, 1899-06-02
} Mines and
} Mining.

carats, valued at over S4OO, 900, O0O.-
Elk.
The value of the total mineral prod
uctiOn of California in '9S, both metal
lie and non metallic, was S27 ,2S9, O79.-
Elk.
1t is estimated that the present an
nual output of the United Verde copper
mine in Arizona, exceeds SIS. O0O, OOO.-
Elk.
The gold ores of California contain
on an average about 2 per cent sui
phurets, worth from $40 to 5000 per
tOn.-EX.
The theory of concentration is based
on the difference in specific gravity OF
the various minerals contained in an
ore.-Ex.
The usual supply of copper on May
10th rs reported from London, was
26, 529 tons. A decrease of Ill tons in
two weeks.-Ex.
Where rock is soft. the edge of a
bit should be sharp, and, as the hard
ness of the rock increases. the edge
should be less acute.-Ex.
The Copper Queen Mining company
Of Bisbee propose soon to more fully
| develope their copper mining property
below the line.-Bisbee Orb.
A volume of 3S6 Gu bic feet of air
travelling 1000 feet through 3-inch
pipe under 60 pounds pressure loses
about 81 pounds by friction.-Ex.
1t is stated that the New Idria quick
silver mine in San Ben:tO county, Cal,
can produce quicksilver cheaper than
any other mine in the United States
Elk.
About five gallons of water are re
quired for steam making hourly for
each horse power. Each stamp requires
80 to so gallons per hour in the bat
tery.-EX.
When estimating requirements when
selecting a cable for hosting in
mine, it is best to allow from one fifth
to one-seventh of the strength, accord
ing to speed.-Ex.
In the Leucite Hills northwest of
Point of Rocks, Wyoming, occurs a
leucite rock which is allied to Phono-
lite. The rock has feisltic texture,
finely porous, and is of light, yellowish
gray colOr.---EX.
Molly bdenite is the sulphide of moi
ybdenum, and is used in the manufac-
ture of steel, but is not in use on the
Pacific coast. The pure concentrated
mineral is worth about 5000 per ton in
eastern markets.---E
The Patagonia mining district is
again coming into prominence. "A
large amount of development work is
being done in the district which prom
lses to take it's pace as one of the best
districts in southern Arizona.
Star.
The average cost of producing the
greater bulk of copper in the United
States is cents per pound, though at
most mines the cost is greater. The
lowest cost is said to be at the works Of
the Boston 81 Montana Co., where it Is
cents, the next lowest being Calumet
& Hecla.---EX.
The slight fiuctuation in silver
seems to indicate that nothing unusual |
is in progress that has a ma eriRl in |
hueuce on that metal. After q sudden |
rise few weeks ago, and subsequent |
decline, it is again quoted at somewhat
higher figures, but fraction lower |
than the highes point reached pre-
Every $50, pound stamp in a mill |
dropping ninety five times minute
requires about Z II. F.,
and an SX12 rock-bresker requires
from to 8 II. P. according to
character of ore. Abundant power
should always be provided in either
hoist or mill.
A straight edged drill bit does not
,traig ht-edged bit will break on the
edges or become dull quickly. The
Dit should be bluntly pointed and the
)oint should be little to one side of
he centers to avoid sticking and to
the best work. -Ex-
;hange.
The cyanide plant at the Ell Dorado
anyon, Arizona is proving one of the
,reatest successes of the age. The
ent, the highess ever reported with
his process. The loss of cyanide is on
y one-half pound to the ton, represent
ng loss of sixteen cents. Thirty
light tons of ore are worked daily, and
he average velue per ton is about S3S.
When all the refuse ore and tailings
re worked up an immense plant will
re put in and water pumped up to the
The manufacture of zinc spelter, or
he process OF zinc smelling, is briefly
5 follows: The ore is first calcined-
oasted to drive off the carbonic acid
nd sulphur and to be transformed in C
o an oxide. 1t is then crushed fine
nd mixed with half it's weight of fine
rushed coke. The mixture is next
hsrged into cylindrical retorts, and
here heated to 1900 &C. At the tenn
erature the oxide is reduced and vap-
rizes, passing from the heated retorts
nto a condenser. where it liquefies, is
rawn off and cast into mOlds.-
*.
Many fake mining schemes are now
eing foisted upon the public and more
specially copper shares. The great
aspect iu which anything ssvoring of
opper is held has caused the eastern
larkets to be deluged with wildcat
,hemes having the red metal for a