The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1899-03-28


! fiHt unfa rt,a mrHH fh'
NtIfHI ~ mH aIU 'nuffH H
] alH.IH W 'NH NIH'HN HN' eve
Impressed a.r f. H H0 pr
|e"| Dol HHat r..fn IUHaI f1 fHr iit
f.r Dol wU0f HH.I. IrH HInIHf
a. u.# H electric auIIFaIYu euHi
|HH.F. IfH fHHH rl Imr fNH tsiFh0
H uuU. Hf HHr W|l. HIHu0H. tIh
.Umrr,sI H. orc iuHifHi mile.
would .uIu nHf UH. hundred Time.
Ha l.af uf ono milo fIr Hn .qual
IfHrsmi.aIUu Hpfrfy Hf 'Nr pipe
There aIn WsuF points Df rosDmb-
HUgr ua we'll UH difference. between
lsirHHIfr HUH compressed HI. hat
lHuyo Dot been generally known. Do d.
IL we'll known fact tbIi for economical
IaI,rfrr power transmission very high
yuItBF's must Dol used. Eay from tan tD
InWy thousand volts. and H' tho term.
! uus. stDp-dDVn transformer. are ro-
Iqu.rOd 10 bring The pressure down for
safe distribution and use 20 Eve hum
| iTDd volts or less. ]. was no. until
recently recognized that compressed
| DIR can boz transmitted long distances
! Economically only at high pressure,
say Of 1000 10 $500 pounds per square
| inch. and that 3. also must be- reduced
at the terminus, O about 100 pounds
90 be- economically utilized loo the ylT-
! iUus forms Of cir motors.
! Nothing has been said above regard
ing the use Of wafer power. which can
Doe used 90 run either an electric gen
orator or an air compressor. On aC-
Ic0unt Of the greater economy Of com
| al "a
| the front not only a. a competitor, but
az an aid TO electricity II power can
not be transmitted long distances saft-
| ly and economically by electricity, itI
can by air, and the power thus trans
united can De used locally 10 generate
electricity for heat. light and other pur-
poses. and in addition, the compressed
air can he used for refrigeration and
ventilation.
i On account Of the vdstncss, II is inn
possible in 50 few lines, TO give more
than a smattcring Of this subject 70
make a scientific comparison would re-
suit in large number Of complicated
formulas. Suffice to say that com
pressed air like electricity. Is Success
fully driving thousands Of machines;
but regarding economy, safety and
simplicity of operation, compressed
air Is now in the ascendancy.
Statements have often been made
that in Paris the compressed air sys-
tom has proved failure and that great
losses had been sustained by the in
vestOrs This H. not a fact, but allow
Ing II to be So the reply Is that no one
has a right TO expect great success
"a Ia. fa1 In
lprcssed air power transmission are yio-
lated. All attempts heretofore at
power transmission have been made at
low pressures Of from 60 to 200 pounds
| per square inch but a. the loss of pow
Ter in transmission under a given
weight Of air at 200 pounds, initial
pressure, Is ten times as great as II the
lprcssure were 1000 pounds, 1t can read
lily he seen why great success has not
hitherto been attained. Ignorance
pre- judice, and the large amount Of cap
ital invested in electric manufacturing
plants and apparatus have retarded
the recognition and universal adoption
of compressed air as the most econOm-
zeal and efficient agent for
the propulsion OF street cars
and automobiles for city and su-
| lurhan g,ryf.a NyaIl IA.
missinn o, mower tn grc,, Gio,annas
II can ho g,,ccoy,,nI,,' da,,nns''a,,I
| that tho mower octnoIIy utiIiyed In loot
mounds in the cylinder NJ nm air motor
is largely in eycoss nf tho no,er cy'
pendad in comnressiop and that air
under hiph tension can ne transmjttaJ
"a very great distances vim M Iimu'
nition whatever in tho omount M worL
that II is actually capahIe NJ nerrorm.
!, ling. This last statement generally
nroyokes n smiIo of incroduIi,v I'M,
the eynlonation Iios In tho nar.roc,ion
of the simpIe and ngriont modarn MR.
rehcatsr The volume NJ ono Mound -,
steam AT atmosnberio tansior l., 90
cubic feet hence when sto,n, Ia usoJ
for heating the mir II adds more Than
) 40 pcr cent to tho volume M air admit
ted into the motor cvIinder. but the
mir itself Inv incre,sn n, t.p,ora,rr,
, is also expanded moro than 20 Nor
cent Thus tho volume Of tho air "a
increased more than 1O0 nor conf m a
tnmperature Of 36O degrees In otber
words. by the simp,e nrocess NJ ro.
heating less than ono-hoIs tho weight