Elk City mining news. (Elk City, Idaho) 1903-1913, 1906-02-24
CONCENTRATES.
Canada,

An inclined shaft sunk at an angle of
45' gains 70.71 fit. vertical depth in
each 100 on the incline. Sunk at co., it
gains 866 fit vertical depth for each
100 sunk The vertical depth gained
by an inclined shaft varies as the sine
of the angle at which the shaft is sunk
below the horizon, and the departure of
the incline from a vertical line falling
from the collar of the shaft is as the
cosine of the angle of inclination. Thus
an incline shaft sunk 100 fit. at an
angle of co. gains a vertical depth of
86.6 it., and departs SO ft. from the
perpendicular.
Iron pipe for mining operations is
not new thing in the west. In 1857
an iron pipe, 40 inches in diameter, was
laid in Yuba county, CAL, near Timbuc-
too, for hydraulicking. In recent years
where pipe of large diameter is requir-
ed, that made of wooden slaves has
found successful application. The pipe
line of the noted water system in
Western Australia is of steel and 80
inches in diameter. 1t is nearly 400
miles long and was built by the govern
ment at cost of SIS, 900, 900 to supply
fresh water to the mines in the desert
region about Kalgoorlie. The Home
stake company of South Dakota has
laid several miles of vitrified pipe for
conveying water.
The so-called Steamboat springs of
Nevada are about six miles west of
Virginia City and at the eastern base
of the Sierra Nevada mountains, in a
granite region. These springs come up
| through assures in the rocks and all
the waters are hot, some of them boil
ing, and clouds of steam may be seer
issuing from them at any time, which
gave the springs their name. Some Of
the springs deposit chalcedonic silica
others deposit carbonates of lime, IRON
etc., and some deposit sulphur anC
cinnabar. Several attempts have beer
made to open a mine on the cinnabal
deposit, but it has been found impracti
cable, owing the heat generated by the
scalding water. The Steamboat Springs
have been regarded by some eminen
biologists as affording an excellent il
lustration of how ore deposits general.
are formed; but while this is doubles
true of that particular type of deposit
it is unfortunate that investigation
have only been possible at.comparative
! ly shallow depth. Some years ag
considerable cinnabar was mined in
/ superficial way at these springs and tn
ore reduced. Gold as well as cinnaba
is being deposited by these springs.
e The attempt of miners to identif
Y rocks in the field without knowledge c
e Photography is almost useless. Onl
f typical rocks can be thus readily de
: termined. Granite and synite ma
e look much alike. Rocks are classife
r according to the minerals of whic
e they are composed, and the studel
r, must first learn to identify these sever
) minerals Enthusiastically, and then lean
|, the names of their association Thu
Il granite is composed of orthoclas
d mica and quartz. Should hor
blende replace the mica, it becom
l. synite, and the quartz is not essentis
5, Should the feldspar be plagioclase, /
in stead of orthoclase, the rock becom
E. diorite, and the mica is not necessar
re and SO on. through an almost endle
in number of minerals, and differentiati
Of in the names, depending on the ado
M ton or absence of certain minera
rs Structure is also important in the &
IN termination of rocks whether t
DO groundmass is crystalline; coarse