Arizona republican. [volume] (Phoenix, Ariz.) 1890-1930, 1917-02-18

prefers to spend his time in develop
ing his find rather than in setting
his monuments at the corners of
perfect rectangleS. 1t would certain
ly work a hardship on him if
he were compelled to have the boundar-
les of his claim on arbitrary courses,
and particularly SO if it were on un
surveyed land.
The prospector would receive no ben
eft from a regulation that would per-
nit his neighbor to pay the land Of
flee 500, or any other reasonable sum
, in lieu of doing his annual work. Ad
hitting that many prospectors try to
hold more claims than they can rep
resent properly, | think the majority
try faithfully to perform their annual
work, and they would regard such 4
regulation as class legislation favor
able only to the non resident owner
who is not diligent IN improving his
property.
In the west many c,2irns are ownec
by men who are financially able to pei
form only the necessary annual labor.
The development of iaeSe claims pro.
crosses at the rate of 500 per year,
and very few of them can make
such a showing in seven years that
capital may be secured to complete
their development. and onlv an occas-
| ional one makes a mine at that time.
AS it costs about $500 to patent a
20-aere claim such a law would mean
at best that the development of each
seven year-old claim owned by poor
men would be arrested for three years
and in many cases would compel a
complete abandonment. Is that not
| deprlving man-an indispensable man
in the mining busness-of his prop
erty without compensation Multiply
the development done in three years by
. the number OF seven year old claims
in the entire mining territory of the
west and the product will be the an
nual cost to mining development.
Any change in the law that applies
particularly to prospectors, except per-
| haps a regulation that will cause in
those cases where there is delinquency.
full compliance as to annual labor.
will Work a hardship on prospectors.
and will defeat one important object
sought to be attained by a new code,
namely the stimulation of prospecting
and development.
Dry Placer Mining
BY A. Mailman il. the Mining and
/ Scientific Press
To the Plomosa mines, &c miles
. south of Bouse, Yuma county, Arizona,
is due the credit Of installing and OPP
Grating a successful dry placer plant
on large scale.
The ground is cemented conglomer-
, ate. % to 80 feet deep. Although the
main deposit lies on and near the
bedrock. the whole mass carries gold
from the surface down. 1t will average
81 per cubic yard.
The reduction plant is 80 feet above
ground to be worked. 1t consists of
one Sauerman Bros. drag-line excava-
tor. the bucket having a capacity Of
, one and one-half cubic yards: it is
operated by one man and will dig and
deliver so cubic yards per hour The
power is supplied b 1875 horse power
| Bessemer oil engine. This engine con-
sumes ten gallons of "a degree fuel
oil per hour at a cost of seven cents
per gallon at the mine.
/ the contents of the drag line bucket
are dumped into a bin l2x12 feet. I'm
mediately beneath this bin is a recip-
rocating feeder that has an omen
! ing of "a inches, and receives every
thing that comes along; care, how
ever, is taken not TO allow any boul-
7 ders to enter. From this feeder the
material drops into a Williams chain.
hammer mill, consisting of "a cylinder
/ about As inches in diameter and six
b
with hard steel gratings set three
| sixteenths of an inch apart to allow
pulp to dro- through. This cylinder
moves at the rate of 80 revolutions
! per minute. in the center of II. extend
! ing two feet beyond either end. there
/ is a shaft five inches in diameter TO
/ which is attached number of ham
mers fastened by a chain of three links
on collar. This shaft revolves at the
/ rate of 400 revolutions per minute.
; The material to be treaed does not need
to be crushed but disintigrated and
separated from the gravel At the OPP
pOsite end an opening allows the waste
to discharge. About forty per cent OF
the whole mass passes out of this end
, partly broken up. The remainder, that
| contains the gold, passes through the
grating and gravitates to an elevator
having a capacity of fifty tons per
hour. This elevator delivers the pulp
to a No. II Stebbins dry concentration
that rejects eighty per cent of the
pulp. The remaining twenty per cen;
is conveyed to a small elevator and
enters No. Stebbins concentration
which Drodnces finished nrodnct OF