Los Angeles herald. [volume] (Los Angeles [Calif.]) 1890-1893, 1891-10-11
MINES AND MINING.
News Notes About Holes III
the Ground.
An Editor Inspects the Temes-
cal Tin Mines.
A Technical Description of the Tin
Deposit.
Great Progress Being Made at Temescal
What Has Been Done-The Tip
Top COunty--News
Notes.

the following is what he says about
them:
The new stamp mill at the tin mines
was started up last Saturday and has
been run every day since. On Thurs
day we visited the mines and found
everything moving along smoothly. Not
being able to find Captain Harris we
were shown around the works by II. Z.
West, young gentlemen who came over
from England to superintend the put
ting together of the new mill machinery
which was manufactured by Harvey &
Co., of Hayle, Cornwall, Eng. The en-
CINE is an immense one being capable OF
working up to over 200-horse power. 1t
is very strong and well built and has a
well-fnished appearance. The battery
of two stamps is in the same building
and the way it works up ore is astonish-
ing. 1t will mill forty tons OF ore every
twenty-four hours, while the small test
mill will only turn out seven tons in the
same length OF time. Each stamp in the
new battery strikes 1876 blows per min
ute and they are very powerful and work
on the same principle as steam ham
mer only compressed air is used instead
of steam.
1t is a great satisfaction to Mr.. West
and his firm that the machinery is
proving so satisfactory, it being the first
of the kind on the Pacific coast if not
in the United States. There was re-
port in some of the papers a short time
ago that the new machinery would not
Il ho hok +1,o
which the crushed rock is forced would
clog and break. We are pleased to say
no such trouble has been experienced,
but on the contrary everything is work
ing to the utmost satisfaction of the
management.
In the new concentrating room there
are several COMMENTATORS running, and
more will be put in as soon as possible.
They are working nicely, there being
three kinds, Woodbury., Frue and Tri-
umph.
The mine is being developed as fast as
possible, great deal OF the work being
let by contract and the men underground
which number about forty-fve are MAX
ing good pay and those disposed to save
their money and make the most of it
can soon be in comfortable circumstan-
ces. The management desire to secure
steady men and are making those that
are married as comfortable as possible
by building houses for them to live in
and charging only small rent for the
same. A dozen or more houses for the
men have already been erected.
On Sunday all work that can possibly
be closed down is stopped and day of
rest is taken. At 8 O'Clock services are
held in the store room, portion of it
L l. IL &c. hot
MIR. Richard Smithran and several 9TH
ers taking a leading part in conducting
the services, which are we'll attended.
Miss Smithran presides at the organ
and together with several good singers
provide some good music suitable for the
occasion.
Strangers are given hearty welcome
Caialco and will be well treated by the
management and the men employed
and one cannot help but feel as though
they have been we'll treated. Consider
able tin is being turned out every month
and the mines will soon be paying all
expenses.
At the dam on the Temessal creek
eight or tenn men are at work boring for
bed rock, but had not struck it when we
were there. 1t is to be hoped this vast
work will be pushed to an early compile
ton, but whether such will be done we
are unable to state.
FEATURES OF THE TIN DEPOSIT.
The Temescal tin district is located in
the Temescal range of mountains, San
Bernardino county, California, and pre-
sents large surface of granate that is
in a remarkable degree similar to the
formasion in Cornwall, England. 1t is
ii ha ha 10 Az
river and valley, on the south by the
Temescal river, (Which separates it from
the Santa Ana range of mountains,
containing the only coal meas
ures being worked yet found in
Southern California; and to the
west lie the Santa Ana plains, which
skirt the southern slope of the latter
range and extend about twelve miles to
the Puenta and Chino hills (shale),
wherein exist extensive deposits OF
asphalt and oil springs. To the east
runs the San Jacinto range OF mount
aims (the San Bernardino range lying to
the north and northeast of the estate
about twenty miles. In coming from
the Santa Ana plains Con the west) and
crossing the Temescal river you ascend
the foothills of the tin district on a por-
phyritic formrtiop, geologically speak
ing, its average altitude being about 50O
feet gbove the river. The width of this
porphyritic belt is about one mile, and
II strikes southeasterly for distance OF
about eight miles, whore it intersects
the slate and shales of the porpyritic
belt, comes an Elvan porphyry OF fine
texture of a grey-white or rosy color.
This is often encountered in the granite
formation in close proximity to the
tin lodes. Then comes the tin
granite, with its strike southeaster-
" and northwesterly, having a
known length of twelve miles and
width northeast and southwest OF about
four miles. Within this area OF granite
occur veins or lodes of capel heavily
charged with tin Oxides or cassiterite in
remarkable pure form. There are over
sixty known tin lodes in this formation,
running in a northeastern and south
westerly direction, and nearly parallel,
in the aggregate representing an estl-
mated length of tin lode of at least thir-
ty-five miles, the ore being brown OK
ide OF tin, free from wolfram, mispickle
and m1ndic, and the iron present IL IN
the form of an oxide oil low
per cent. The ore is easy to
reduce, and can be concentrated
expeditiously into black tin (cassi'er
ite) that will return at least 10 per