The San Francisco call., 1908-11-02

sorial earth are devoted include the construction
Of freproof buildings, insulation of heat cold
and electricity; filtration schemes OF many kinds;
pipe and boiler coverings; toilet articles: labor
atoFy uses, and many scientific and chemical
uses
The only commercially utilized deposits of
magnesite in the United States in California.
Magnesite has been mined in a number of Cali
fornia counties Most Of the California mag
nestle comes from deposits In Tulare county.
There are also deposits in Alameda, Fresno
Santa Clara. Sonona and Stanislaus counties.
There are many deposits in California that are
known. but those are utilized only, generally
speaking, that are near railroad lines. where
cheap transportation is procurable. The con-
sumption OF California magnesite has been con-
fined principally to the Pacific coast Magneste
imports to the United States have amounted in
value, between 1897 and 1907. to 506,172 short
tons, estimated at s4, ,275. AL.
AT the present time 1t is impossible for the
York market against the importation from
foreign countries-but. with proper measure Of
increase the volume of their production. thereby
reducing the cost, there is no doubt but what
they would be able to successfully supply the
demands in this country.
Magnesite is used in the manufacture of car.
bonic acid gas paper twood pulp manufactured.
and in the making OF bricks. Experiments have
been made with caicined masnesite as a base
for tiles, which is likely TO extend the demand
for the material. Magnesite is produced in
Africa, IN Greece, in Italy and in Venezuela
In the last named country concession is re-
ported to have been secured for the exclusive
privilege. of exporting magnesite for a period of
years. private contract is said. also. to have
been made with an American company TO take
the entire quantity exported from Venezuela.
The production of magnesite in California
amounted from 1887 to 1907. inclusive Of both
years, TO 44,27s tons, estimated at $685., ,515.
The value of the production in California in
1907 is estimated at SIS, 72o..
New discoveries of high class ore are
reported in California mines. The Grass
Valley Union says that the owner OF
the famous Lightner mine in Sierra
county has found a continuation of
the ledge in a long bore of 1,400 feet
from Kanaka creek, and that an i'm
mensely rich pay streak continues down
from the upper workings of the mine
J. Z. Manganate and E. c. Kava-
naugh, so says the Sierra Times. have
found quartz 10 feet below the surface
on the east mother lode, half mile
west of Jamestown, that is worth IS
a pound.
Tuolumne county mines, so says the
Sierra Times, have yielded gold as fol-
lows: Bonanza, s1.250,0 900; Colby Git-
tie Bonanza), 100000; Ford, $4,000;
Garrett s175,00o; Austrian, s160,000;
Sell, $4,000; Seminich, s160.o00: Bald
Mountain, s150,00o; Sugarman, $3.50, 900:
Morris, $4,000; Tansy, $225.000;
Tainter & Grew, $4,000; Brown claim,
$4,000; Pedro claim, $4,000; Hurnie
$4,000: Saratoga, $4,000; Fairview
s2O.000; Tullock lead. $4,000; O'Hara
Bonanza, $250000 These mines are
all placer properties along the Woods
creek, on one side of which is Bald
mountain. The Times says that taking
in placers and lodges. Tuolumne coun-
ty has produced, since 1898, $780,
600 year, on the average.
Good ore, so says the Nevada City
TRANSCRIPT, is coming from the Bella
Union mine. Assays have determined
the rock to be worth s12.41 to the ton
This is taken from a ledge 20 inches
wide.
The management of the Plumbago
mine in Sierra county, SO it has been
reported has reached decision to bore
the lower tunnel on the property to
the distance of another mile to bring
1t out on the Kanaka creek slope
Rich ore has been struck in a new
place in the Washington mine in French
Gulch, Shasta county, so says the Red
ding Searchlight. On the same author
ity 1t is said that the ledge is two feet
thick and that the ore is worth $1,000
to $4,000 a ton.
The Yellow Jacket mine on the north