The San Francisco call., 1904-09-17
MINES FIND NEW OWNERS
DEVELOPMENT FOLLOWS
CaIaveras County Expects Much Growth.
Copperopos Has Cheering Outlook.
At Angels 1000 Men Are Employed

series relating to the mineral resources
Of California. Two field assistants are
engaged in collecting the necessary
data for q bulletin to contain all that
can be learned about the industrial and
structural materials of California that
are taken out by mining processes. The
bulletin relative to these materials VIII
be issued and ready for distribution IN
March. The work Of the field assistants
in this direction has been about COM
pleted in the southern counties of the
State. Attention viii next be paid
especially to the northern and central
sections of the State, where some work
has been already performed. In addI-
tion to this bulletin one on the gems of
California viii be published. The Cali
fornia gem field is mainly in San Diego
County, where gems of several kinds
have been discovered in merchantable
quantities. A display of California
gems was one of the features of the
California mineral exhibit at the St.
Louis Exposition.
Concerning recent mining develop
ent Of the Mining and Scientific Press
writes:
At present this county is the home OF the
prospeetor and small miner. Every canyon and
gulch is being staked with claims, many Of
which are being worked by three and four
volve as much labor and capital do the few
large mines in the more southern mining coun
have developed into large properties. employ
ing many men ana producing handsomely But
Il may be safely stated that, as rule, Sierra
is essentially the county OF the prospector
In trip extending through the width OF the
county west Of the summit Of the Slerras many
OF these mines were visited, and a description
OF the conditions throughout the county Will
undoubtedly prove OF interest not only a
mere description OF the county but also as a
NJ ha flrrlar nf h.
ers, for each mine is continually installing
machinery. The county will be described by
towns from south TO north.
At Pike City the Alaska mine has been
bought for 500 and on August men were
unwatering the shaft. preparatory to further
development. This mine has been worked
intermittently by different companies since
1856 an eiKht-stamp mill having been put
UP in 1858. During this time over 81. 900. 600
face. The present intention is to test the
value with increase in depth. The present
be continued. A twenty-stamp mill Is the
property the forty-stamp mill having been
burned. The company is hauling in electrt-
cal machinery and an air compressor from
above Oroville. George St. Johns has charge
OF the property. The development of this mine
will materially aid Pike City.
Thirty men are at work at the Plumbago
mine below Allegheny. This quartz property
has been steadily producing for number OF
years. The tunnel is in nearly 1900 feet The
mine is equipped with twenty mill,
also power plant generating electricity for
the PlumbagO and the Oriental.
At Allegheny the tunnel of the Oriental
mine has been driven in 1850 feet and a branch
Of the main quartz ledge has been struck
The vein occurs in diorite and has been par
TALLY developed by 1000-foot shaft. H. L.
Johnson Is superintendent in charge. NJ. W.
Mather is manager.
Il. L. Johnson. the bonder of the Tightner
mine. reports mill return Of $500 from a
mill on 1000 pounds of specimen ore taken
from the large shoot recently opened up. The
shoot has been followed 10 feet and averages
15 feet in width The rich rock is found
as q ribboned quartz within feet OF the
serpentine hanging wall. The foot wall is
schist II is planned TO start 1O0O-foot
drift to intersect this and other known shoots
at a lower level. A ten-stamp mill will prob
ably be put in near the mouth OF the tun-
mel.
Drift mining in the southern part of the
county has been important industry since
the early ffties. The called blue lead
extends through the county parallel 70 the
main range Of the Serras and at right an
giles 10 the present streams. The channel was
discovered in 1852 near Minnesota. This body
OF gravel is capped with several hundred feet
OF volcanic debris. The paying portion is
about 800 feet wide and from one to three
feet deep. lying on or near the bedrock.