The San Francisco call., 1909-11-28
MINING MACHINERY
SENT OVER WORLD
San Francisco Manufacturers
Supply Hydraulic Equipments
That Excel All Others
Joshua Hendy Iron Works Also
Ships Stamp Mills tOEcua-
dor and Korea

Among the industries OF the iron and
steel business is that of equiping ma
chimes for hydraulic mining in this
state. Nevada and foreign countries.
Hydra uIfc mining has reached such an
extent. where it is not restricted, that
hundreds Of square miles of ground
are being converted into valleys and
CANYONS through the turning of mother
earth over to look for the precious
metals
Africa. the Philippines. Korea, Bor
nee, the Strait Settlements, Sumatra,
Batavia ia Java and Ecuador are do
ing millions OF dollars worth of mining
through the hydraulic process. and
using machinery made in San Francisco
10 develop the Industry with as we'll
Few persons realize the extent Of
the prepsration that hydraulic mining
necessitates and the enormous guam
tity Of machinery used in its develop
ment Like everything eise the quality
Of machinery used must be superior
ln every way TO the himsy construction
that Is being used by some eastern
manufacturers.
MARKET PLACE Or WORLD
As far hack as the first days fol-
lowing the gold rush OF ~, when hy-
draulic mining was little heard OF
"a fifornfa made machinery was used In
whatever form that was necessary
Then came the advent OF the hydraulic
process. and its many new advantages
NAM small towns in California have
sprung mp in The shadow Of the hills
made by the hydraulic mining develop
ment Machinery made i'm san Fran
cisco WAS used in all these cases TO
such an extent that this city became
Abe market place Of the world for min
ing machinery
BUT the dissolution arising from
strike conditions and the hard times
of ISet." following mp 10 the year 1879,
caused 2 discontinuance % such de~
mand Tor san Francisco made ma
rblnery. This was prima rily on ac-
-ouut OF the eastern manufacturers
agents coming into This field and tax
ing N She contracts and duplicating
san FIsncisco mae hinery with an east
-rn product
EASTERN PRODUCTS INFERIOR
with the raw material being re-
duced at their door they. the eastern
ers. began 10 corner the market on
mining machinery TO a certain extent
with machines that looked just as good
As the local product and We're very
much cheaper As 2 consequence the
t,eoale here and in other countries ac-
.epted eastern machinery that was
l.i. eaDer. because it looked just as
good. even 81 il did not have the quality
fr H. like they do even to this day IN
many commodities. overlooking the TACT
that eualftv is the essential thing after
AL And so il has continued
Thanks 10 the san Francisco manu-
fa~.urer's reputation, and the field that
T. .cr.af n
10 see the dissatisfaction arising from
the eastern product. and made an ap-
neal for the business that was once
theirs. Some OF i they have got back,
but the majority of it is still in the
hands Of the eastern manufacturers,
though slowly but surely the local men
are regaining their lost ground. The
people realize that after all there Is
nothing better or quite equal to San
Francisco made mining machinery.
SAMPLE OF LOCAL WORK
one OF the manufacturers here who
has perhaps had his share of the ma
chinery business in spite of eastern
competition and has continued to sell
hydraulic machinery in all parts Of the
world where the hydraulic mining is
permissible is the Joshua Hendy iron
works. a pioneer firm in mining ma
chinery. But even that concern is not
getting its share Of the mining busi-
ness. for since the fire and Immediately
following il many manufacturers
agents came in here as they did dur
ing the years between 1894 and 1898
and took advantage of the condition of
the city and captured great deal Of
the business.
But conditions are normal again and
manufacturers are going after the busi-
ness. perhaps stronger than ever on ac-
count OF eastern competition Besides
local people are better equipped with
more modern machinery TO handle the
tRde.
The illustration herewith shows a
pipeman directing a stream of water
from a hydraulic giant at the La
Grange mine in Trinity county, Cali
fornia. probably the largest hydraulic
operated mine. in the world. The ma
chinery for the mine was supplied by
the Joshua Hendy iron works and
operates the enormous equipment neces-
ssry 10 deal with such ground.
The length OF the nozzle alone, with
the man sitting in a saddle provided
on ali those large machines, is 19 feet
whiie.it is 10 inches in diameter at the
mouth.
The water pressure used in all these
hydraulic mines is natural and is
brought for many feet around incIines
that gather the force of gravity. Ir
this pa rticular mine (the La Grange)
there is a pressure of $50 feet through
= 10 inch nozzle. or 110 cubic feet OF
water passes each second equal to ap-
proXimately $4,000 gallons minute
One can imagine perhaps more clearly
what such an amount and force OF
water means when il is estimated that
that amount of water will weigh about
200 tons.
METHOD OF WORKING NINE
In carrying this tonnage of water
the ground is broken and undermined
al an average of / 900 cubic yards ar
hour. making it easy to segregate the
gold from ordinary gravel
The pipeman, who sits in the saddle
directing the force of water, must b,
careful in his manipulation Of the noz
zle. for IL is disastrous to misdirect i
from one point TO another. sometimes
undermining. where il means a loss Il
the mine operators and perhaps spoil
ing the entire side of q hill
Where 1t is necessary to begin oper
ations on a fiat surface and not on
side of a hin in hydrau mining, il /,
necessary to first break the ground b,
blasts before directing the terribl,
force of the giant nozzles.
USED IN AFRICAN MINES
The giant nozzle In the picture is on,
Of several recently manufactured bv th,