The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1896-08-08
of the compressed air under carefully reg

OF the compressed air under carefully reg
ulated conditions.
Most people probably have seen. at one
time or another the familiar lecture room
experiment OF forcing a piston suddenly
down a cylinder and showing the ignition
OF scrap OF touch-paper by the heat
thus produced. II, while the compression
Is maintained, the cylinder and It's con-
tained air be cceled TO the original tenn
perzture then, suddenly Withdrawing the
piston and allowing the air TO regain It's
original volume there VIII be tan OF
temperature corresponding to the rise on
compression. II, now, the cooled AR
could be used TO reduce the temperature
Of a second quantity of air before expan-
sion. II Is evident that. starting from
lower point than the first batch, the sec
ond would, on expansion. reach lower
point This is the principle OF the new
Iquid-air apparatus.
A powerful engine congresses air, which
IS cooled. as far as possible. by ordinary
refrlgerating methods and passed into
snirally colled pipe over lo9 yards long
This pipe Is inclosed in n second spiral 10y
means OF a throttle valve al the eno OF
the inner spiral. a certain proportion OF
the compressed air Is allowed 20 EXPAND
in the suaee between Il and the outer
rlpe. Thus. the stream Of compressed
cir from the pump IS cooled by that por-
ton which has been allowed 20 expand
and arrives at the throttle waive IN
colder state than the portion that pre-
eeded II. Consequently, II reaches a sun
lower teTaueratura on expansion, coolns
yet more powerfully the advancing stream
IN the inner tube By carrying THIS Gu
rnuiative cooling effect sufficiently far'
TIE circulating afr Is a last brought down
Ia IFS critical point and iquities, after
which q continuous stream Of liquid air
Is merely a question Of engine power.
It Is imrosslbie. without the aid OK dia-
grams. TO explain clearly how the con-
ttn7Ifrv ~ the process ~ maintained. but
the cycle OF operations can be readily
apprehenAed There is compression, ex-
pansion fin closed chamber, and the oti-
ization of The cold thus produced 70 re-
peat the cycle from a lower initial tenn
pera'ure.
the inventor. Herr IAnde, who Is a man
o. great experience IN refrigeraunE ma
chinerv and methods, believes that
large demand Will shortly arise Tor this
most powerful Of al refrtgeratoTs. IN
the meantime. his apparatus ~ eeGces
with the greatest case a substance Tor
which there Is already q large inaostFlal
denand-oxyreu gas. During the process
tust described. the air becomes steadNy
rt-her IN oxygen until that gas forms
some 20 per cent. nf the produce, me rel
atlvelv pure oxygen IS sufficiently good
for certain purposes. ard K may De FUR
Their purified from nitrogen II desired.
The prize % oxygen gas thus ootaihed
compares favorah.y In respect q cost
with that produced by the rnsthods now n
use.
r would have been gratifying 20 nave
been ah3e - announce that this CONNER
efal Application % recent scien'ihe IDEAS
has bean made in ne United states, out.
unfortunately. tn this. as in many other
csses. 81 has been made "A Germany.
Were there = a. present very high
standard - technical knowledge.
+ is obvious from what nas haen said
that fhis process Is al AFFAIR ~ engineer
Ing far mere than q chemistry Tbs re-
mark applies 20 many % The most m
poTtan5 ard lucrative manufacturing proc
esses 81 TIRE day. and engineering cnerats-
try. Or chemical engineering. e 1lsk one
C the things IN vhteh the Germans excel