The San Francisco call., 1899-07-24
MINING STORIES.
AN EXPOSITION TRIUMPH
A NEW MINERAL FOUND.
ON FILIPINO MINING.
PNEUMATIC PROSPECTING


ing display is to get one-fourth of the
entire space allotted to the United
States. This should stimulate enterpris-
ing cooperation with the California COM
mission in placing the finest and most
effective exhibit possible under the rules
of the exposition.
The arrangements for State exhibits
were consigned to Victor C. Heikes by F.
V. Skiff, director of the United States
mining exhibit. Mr. Heikes, as special
commissioner, visited several Western
mining States, finding nowhere organized
preparations for representative State eX-
! hibits. He talked to men and organiza-
tions. explained the plans and conditions
Of the exhibit, told what was wanted and
solicited. with considerable success,
efforts to gather an exhibit in each State
But when he got to San Francisco two
weeks ago he found an active and able
commission at work with $4,000 at its
back and that it had already made liberal
plans for the largest mining exhibit pos.
sible and put the matter in the hands OIL
Charles q. Yale, perhaps me most com
petent man in the State for the work
He soon learned more about the greatness
of the industry in this State and about
its unapproached variety of mineral re
sources than he ever knew before. lie
talked with Mr. Yale and heartily ap-
proved his selection he did his pre-
liminary plans and ideas. He decided that
all he had to do here was to explain
the wants and conditions of the exhibit,
give California room according to its
merits and enterprise and leave the rest
with Mr.. Yale:
The result Of his study and his confer
ences with the commissioners, secretary
Gaskil and Mr.. Yale, was that he allot-
ted practically one-fOurth OF the space
given the United States to California
Like every other feature of the eXpOSi-
ton the mining exhibit requires COM
preston and the whole United States eX-
hibit will not cover much area, but then
it fares better than other countries and
California gets a quarter OF ITS snare
and that is not One-forty-ffth. The
| United States display Of mineral speci-
mems will be in sixteen big cabinets and
California may fill four all by itself. Then
1t may camp on a large share of the re-
manning floor area. The figures cannot
be given now.
will be rapidly developed, and when an
nounced will be found to include some
unique features, some Of which must wait
for approval There will be a pyramid Of
aSphaltum, great number of enlarged
photographs, 22X2S inches, illustrating
every phase of mining; probably minla-
ture stamp mill operating on ore, ana Oth-
er things that will attract universal at
| tention. The meteorological display will
include every mineral occurring IN the
State The California exhibit cannot De
comprehensively labeled as such by big
signs, as under exposition rules the whole
Will be the United States exhibit, but
each specimen or other will be labeled
with the names of the State and mine or
locality from which ii comes, and most of
the State exhibit will be together. Califor-
MIA has thus before il its greatest oppor-
tunity TO advertise its mineral resources
and mining industry and opportunities.
The new strike in the Gwin mine, Gala
veraS County, turns out to be bigger
thing than was reported a week or two
ago. In it's significance to the mining in
duStry along the mother lode II is the
most important development in that great
mining region in a good while. The al
most phenomenal success attending the
reopening of this long abandoned old
mine during the past two years has of
itself been a big thing for the mother
lode.
reached at depth by new shaft, showing
it to be vet one of the richest mines along
the lode and indicating that the old WORK
ings left millions in the unworked ground
was another demonstration that the moth
er lode veins ''go down and that deep
mining will pay there. The comparatively
recent developments OF large oodles il,5s,,e OF OF
mines as the GWin, Kennedy, Argonaut,
Oneida and others increase ta1th In the
mother lode and encourage mining Gapi-
talists to do likewise. The result is and
will be the investment of millions in deep
mining propositions on the mother lode
But another significance of the new
strike in the Gwin is that it shows the
possibility of not only following the orig
inal veins to great depths prOftably but
cred at depth. The main vein in the Gwin
dips easterly from 70 to so degrees. Ihe
new vertical shaft was located SO as TO
cross the vein at over 1900 feet. It was
continued vertically downward, with the
usual plan of crosscutting to the vein at
different levels, and i-- two weeks ago mad
Al this point a vein of ore was unex
pectedly encountered. 1t dipped about a
degrees parallel to the mann ann V6i6 6ne ana Wer m
at once put in and they showed thick
nesses of from is to % inches. First sam,
pies from the hanging wall side assayed
$50 II and Sl27 13. DrilIings from the holes
went So II, $21 90 and Sl7 81. 1t was from
the developments at this stage that the
brief information in the press last week
was based.
J. Crawford in San Francisco during the
past week from Assistant superintendent
David Mcclure show that a ten feet
more of depth the vein was widening and
its average value being sustained. In his
report of last week Mr.. Mcclure says:
''The shaft was sunk ten feet the past
week. making the total depth 1885 feet. At
a depth of 1878 feet ore was encountered
in the west or foot wall side OF the shaft.
1t extends the whole length of the shaft,
having the same dip and parallel to the
east or main ledge, which is about $50
feet to the east. 1t has a good gouge on
both foot and hanging walls. The foot
wall is blackish gray slate and the hang
ing wall is pudding stone rock, although
at present there is filling of about two
feet of black slate, with quartz stringers
between the hanging wall side of the
quartz and the pudding wall The hang-
ing or pudding wall is very even and is
slickenside polished across the shaft The
ore is hard, compact sulphuretted ribbon
quartz. with an average thickness of two
feet carrying coarse free gold, and may
be cassed as high grade rock, milling say
SIS per ton. We have been making
number of assays of various samples
taken and all our sample assays of the
ore have been high. We picked the ore
down an average thickness Of two feet
the whole length of the shaft and took
a 100-pound sample, using care in crush
ing. handling and assaying. The assay
obtained from this sample was s27 90 IT
is my opinion that we have found a west
ledge parallel to our main east ledge"
Greatness has come to the Gwin since
Senator Voorhies, F. F. Thomas and the
Belshaws bought the 1400-foot water hole
from the Gwin estate at a bargain about
three years ago. The new shaft devel-
oped strong body of good milling ore,
of which Superintendent Thomas esti-
mates there is 10000 tons, averaging from
Sc to 81. already in sight. A small streak
of phenomenally rich ore was found
nearly two years ago, and a large body
Of SIS ore was recently struck in the main
vein Twenty stamps were recently or
dered added to the twenty now dropping,
and the new mill will be ready In Octo-
ber Further enlargement of the plant is