Daily Arizona silver belt., 1908-10-07
SAVINGS EFFECTED
IN MINING COSTS
REDUCTIONS HAVE BEEN EFFECT
ED BY THE INSTALLATION OF
MODERN MACHINERY AND
ADOPTION OF BETTER METHODS

The president of large mining ma
chinery. making company has just com
pleted tabulation of the expenditures
made within twelve months by the pr;n-
cipal mining companies for the installa-
ton of modern machinery and the mod
ernization of existing plants. The rec
ord was made only for mctal-produeing
mines of the first.class, chiefly in cop.
per. gold, lead and silver interests in
North America. The list includes 81
per cent of the mines that are hon.
estly and efficiently conducted in the in
terest of shareholders. II is evident
from these tabulations that the new ma.
chinery and toll installations for the
past twelve months win effect annual
saving of $10,759,000 over former OPP
Grating costs. If all these mines We're
worked by manual power the number of
men in sound health would be per cent
in excess of the estimated manual pow.
err of the adult population of a zone
taking in eighteen miles in diameter
from the New York City Hall, which
population is 100000.
| A special feature of the new machan-
zeal engineering work that belongs to
the annals of the mining interest with
in a year is the installation of large
number of central plants that have dis
placed number of Anticipated isolated
plants of low economy. A notable in
stance is at the Copper Queen properties
at Bisbee, Ariz., whtre six miles OF
main drifts used for haulage to the
cantral shaft have been eonverged and
are equipped with an elNctric railway
that hauls ten-ton ore earn at the We
loeity of eight miles an hom, The cen
trail shaft has been sunk 1900 feet
and is connected with dfits 10 all tho
worksings mt all levels. Under the OLD
system there were FIVE shafts used fol
the uptake of ore and several isolated
plants were used. The new central
power station gives primal imp,dsatior
to steam, compressed air, and electrical
machinery and tools.
One among a number of new msu'
machinery installations in Colorado thai
are making large savings over working
costs uyder the old power installation
is at tile mine that is 10000 feet above
sea level Formerly steam plants were
used. The coal cost SIS ton. For tn,
last lwelve months of coal consumption
! Tor power purposes the cost was $4,000
The development of hydro-electric pow
er plant twelve miles from this mine
gave an opportunity for the mine own
ers to install electric power for nearly
all purposes. The saving in coal fol
one year will pay within 30 per cent OF
the whole cost of the new power ap
paratus.
The manufacture of mining power ap
paratus and tools in this country nov
gives employment to $4,000 mechanics
for account of North American mint
requirements. One local mining ma
ehinery house, which twenty years age
employed twenty.six hands, chiefly fol
mine work in Pennsylvania, is now OPP
Grating five plants in four states with
10000 employees.
Eight mining machinery corporation:
in this market that employ $4,000 hands
on mining and railroad work have in
creased their capacities six-fold il
twenty years. Within twenty years
the m neral Industries Of North, Ameries
have been increased six.fold. On tho
present basis of working, this industry
is producing almost s2,o00,000,0Oo 9
year under the management of citizen.
of the United States.