Los Angeles herald. [microfilm reel] (Los Angeles [Calif.]) 1900-1911, 1910-08-15
NEWS OF THE MINES
CHAMBER OF Mines ADDS
TO BIG ORE EXHIBIT
Display of Rock Now Considered
Best in Southwest will
be Enlarged

one of the few cities of its size and
Importance in the United States that
had no public reference collection of
minerals. ores and non-metallic geo.
logic products of economic Importance,
and realizing the influence such an ex-
hibit would exert in stimulating public
interest in mining matters and feel
ing that this chamber is the logical
sponsor for such an exhibit; therefore,
the plans for such collections, sug-
gested by the mineral exhibit commit
tee, had been approved and adopted by
the board OF directors 1t was said
that ut was considered desirable to
build up two distinct collections-one
an exhibit OF economic geology, includ-
ing the ores, petroleum and other eco
nomic products of the territory trib-
utary to Los Angeles; the other min
ing exhibit, which shall show both the
commercial Importance and the geology
of the various mineral districts of the
southwest"
This will be reference collection of
the many ores arranged according tc
the metal for which they are valuable
and will also include the following min
eral and geologic products: Clays
clay products and building stone ce-
ment rock, gypsum, graphite, road
metal, gems and gem bearing rocks
natural fertilizers and any other geo.
logic products that may be found in
the region tributary to Los Angeles
identified both as to species and To-
cality, which data will be plainly ex-
hibited on a uniform label.
DESIRES SPECIMENS
For this exhibit the chamber desires
good-siZed specimens of very high
grade ore to illustrate the several min
erals which are valuable for the par
ticular metal they contain. Examples:
galenite, cerussite, wulfenite, to rep
~ n. fq l.
achite, azurite, chalcopyrite, bornite,
cuprite, to represent ores of copper.) In
the non-metallic department it will be
necessary to show the raw material and
what it is useful for in the commercial
world Example: graphite and its
finished form, as pencils, lubricants,
paint, crucibles stove polish.)
During the year considerable ma
teriaI has been accumulated for this
exhibit, but owing chiefly to the pres"
sure of work on the committee In
charge that was necessitated by the
enthusiastic popular interest in and
support of the mining exhibit, this ex-
hibit has not been opened to the public.
During the past year an excellent
start was made on the mining exhibit
from the southwest-the territory trib-
utary to the welfare of Los Angeles.
Through the courtesy Of the German
building-in which the chamber has its
uuarters-an exceptionally fine space
for the exhibit was obtained In the
omen center OF the building, where the
collection is strongly illuminated by
natural light from above. A uniform
STYLE of table case was designed for
the purpose and is built by tho Weber
Show Case company. This consists OF
q wood skeleton table, enameled in
white. on which rests the case, which
is frameless and consists of plate
glass top, ends and front with wood
sliding doors in the back that give ac-
cess to the specimens. The cases are
from to feet long, 6 inches deep at
the back and Az inches in front-this
slope being designed to minimize the
reflection of light from the top of the
case. The shallow cases, together with
the strong natural light from above,
enables the observer to inspect the
specimens very closely, and 1t would be
difficult TO design better exhibition
hall than is here afforded. There are
now fifteen OF the cases, each of which
will hold about eighty specimens, and
the exhibit is free of debt.
WILL ADVERTISE BUSINESS
AS this collection is of such a nature
that it cannot be purchased in indl-
viduar units, but must grow gradually
through the generosity of members and
friend OF the chamber who donate from
time to time such sums as they are
willing to contribute for the purchase
of cases and for the collection OF specl-
mems and the accompanying lnforma-
tion-which is the basis of the real
value of the exhibit has been ar
ranged that, when the donations OF
any individual or company reach the
sum necessary to purchase case,
brass plate showing the name and ous-
mess of the donor may be attached TO
the case as an acknowledgement OF MS
generosity.
special appeal is here made to the
producing mines to send exhibits from
their properties. These are OF the
greatest Importance to mining engl-
neers for comparative purposes and to
the general public as an educational
factor. and well worth the small
amount of time necessary to prepare
them An outline of what is desired
is given below, and the collection will
he Transported free of charge by freight
bv practically all of the railroads In
the southwest If consigned to the
chamber and the bill of lading is
marked company is fully. released
from all liability for loss or damage to
this shipment" a..
The following description shows the
material desired for this exhibit:
This exhibit presents, in groups, spec
linens of the country rocks or walls
of the ore deposits; samples or the
average ore as mined, and specimens
OF high grade ore from the mines OF
the southwest Such a group, repre-
senfine each mine separately, bears
large label stating the name and
location of the mine, and each speci-
men will have a separate label stating
in as few words as possible what 1t
represents
For this exhibit there will be de-
sired the following from each mine:
Snecimens of the country rocks and
walls OF the ore deposits, taken where
the rock is fresh and undecomposed.
IF several different occur in the region
of the mine they all should be repre-
sented, These specimens should be
chinped to a uniform size of 4x4x3
inches This should be done in the
tield where there is plenty of material
~ select from. The average ore of
the mine should be represented by sew
eral fragments, rather than by a single
snecimen. The average assay value
~ fine ore represented should be stated.
Snecimens of the high-grade ore can
usually be trimmed to the above-men-
toned size, but when this would In
inre a specimen the high grade may
he REPRESENTED by several fragments.
This. specimen must illustrate the high
cradle product of the mine and must
nat he confined to the finest specimen
nf ore available. 1t should be accom-
nanied by a. statement OF the general
rai,Ie of the high-grade product. Pho
tographs of the outcrop, or other vein
nosures. would be acceptable, and