Los Angeles herald. [microfilm reel] (Los Angeles [Calif.]) 1900-1911, 1908-05-14

DOC. 900 tons-making an aggregate OF
about 10000. 100000 tons.
"Our highest grade ore is that or tne
Lake Superior district, which yields
about four-fifths of the current produc-
ton. In 1905 it's yield was over 3S,OoO,-
600 tons, in 1906 some 3S,00O,O0O tons ana
in 1907 nearly 100000 tons; by the END
of the present decade 1t will average
80 900, 900 tons or more. Even without
further increase, the known supply will
be exhausted before 1940 1t is true
that there are frequent reports of new
ore bodies in this district but on the
other hand the old bodies generally
run far below the estimates.
1.-The total production of iron ore In
the United States up to 1890 was some
275, ZOO, 900 tons; in the next ten years
it was nearly 200,000,000; and in the
seven years from 1901 to 1907 more than
270 600, 900 tons were produced, or near
ly as much as the total for the first
century of our history. The aggre-
gate production to date, 750,0O0.OOO tons,
is about one-thirteenth of the esti-
mated original supply. At the recent
rate of increase doubling each de-
cade) the production in 1918 VIII eX-
coed 100. OO0 900 tons, by 1928 POI, OOO,O0O
tons and by 1888 it will be over 4OO,-
900. 900 tons-i. e.. in that single year.
which ma y of us may expect TO see
an amount aproXimating the entire
production in the United states up 10
the close of last year. By that date
about half of the original supply will
he gone. and only the lower grades OF
ore will remain; and all the ore now
deemed workable will be used long
before the end of the present century
Sun Energy
1.-THE most prom ,ing check on coal
consumption is the substitution or
other power.
"NaturaIists tell us that coal is res
ervoir of solar energy stored up IN
ages past, and that the same is partly
true also of other chemically complex
substances, including ores. The sun
motor still runs; it's rays render the
globe habitable, and may yet be maue
to produce I 5wer through SOAR en-
gines, or may be concentrated IN Lu, !.
naces-as in the Portuguese priest
he1iophore at the st. Louis exposition,
with it's temperature OF 5000 degrees
| Fair in which a cube of iron eVap-
GRATED like a SNOWFALL in Bessemer
| converter. The sun helps to raise the
tides which some day VIII De mar
| messed. and still more practically IL
raises vapor from the sea 10 idh as
rain and supply our mlllstreahs anu
rivers. which it is estimated may solhe
dav WELD over 30000,OO0 morse power
or more than all now produceu -
fueI nv all our engines combined. Dr'
pritchett is responsible for the state
mont that on a clear day, when wen
ahove the horizan, the sun delivers
unon each square acre OF the eafnl
surface exposed to it's rays the EQUIV
alent of 1900 horse power, WORKING con-
tinuously. Thus, there is apunuanIIe
of mower lying around u.s. II we oii,y
knew ho, to harness IT: III Is oilly
within the past decade that electllcal
Transmission has made water power
u available for driving ma
etirarv for smelling and for moving
traire and has at the same time Gre
o+ad q ne, market for copper; yet IL Is
a safe forecast that this method OF
Using solar energy for such water Il
os t6e product of sun heat Will SCOT
offoc+ the constantly increasing drali
IN our coal. And just as the WoouS
aud the ores and the mineral iueis
have become sources or Weaitn 9ilo
mower within our memory 50 WI e.,
noy,e the running waters WITHIN ie"
years. % vuas+ Virgins
ddad exnert knowledge and predlc
tinns on the subject of coal and IRON
~ which he predicted the exhaustion
Of the Pittsburg coal supply IN ninety
three years and the West vest + N,rgih''
ields in practically the same time
''e Iohn Mitchell, former head of th'
Un nRed Mine Workers, estimated t 4, tina tf,
fully y 25 per cent of the coal ,9a in nt tn,
mines already developed nad peer
uaeted and a much greater percentdg'
- without such waste. which he be
Iieved might be overcome the suppl,
of coal would last 1000 instead OF zo
years, as predicted. ,-..
Governor Johnson of Minnesota mao
a lively talk in which he took 1ssu'
with Mr.. Carnegie's statement tina
wasteful methods prevailed IN irol
mining in the Lake Superior region
and cheerfully assured that gentleman
that "Nr. Hill will be glad to take is
sue with him on some things"
John Hays Hammond, who has tn
'o,,ta+ion Of being the highest paic
mining engineer in the country. reat
paper on engineering methods II