The morning news. [volume] (Savannah, Ga.) 1887-1900, 1899-02-27
Ga.

opposite effect on copper gold and the
other precious metals, all of which 1t rem
ders tougher instead OF more brittle. Mer-
curry Is frozen into hard block Mr.
Tripler makes a little pasteboad box the
size and shape of a hammer head fills 1t
with mercury suspends an iron tube In it
as handle, and sets II down in a pan con-
tanning liquid air, In a few moments II is
frozen hard, SO that IL can be lifted out
and used for driving a nail into hard
wood block
Not long ago Mr. Tripler took a can oe
liquid air to the Harlem river and poured
1t out on the water in order 10 see It's ef-
feet Small masse of IL at once collected
IN little round balls on the surface Of the
river and being so much colder than tho
water, they froze, little cups or boats Of
Ice IN which they began floating about
swiftly and humping up against vone an
other like so many lively water bugs.
finally boiling away and disappearing.
! leaving the miniature ice boats quite stiU.
If bit of the liquid air is placed ina
tail jar of water, part of the nitrogen
which IS lighter than water win evaporate
first, then the liquid oxygen, which Is
slightly heavier than the water, wifi sink
ia beautiful silvery bubbles.
Mr.. Tripler shows the terrific expansive
power OF liquid air by placing little OF
II IN the bottom of a copper lar IN the
mouth of which he inserts a cork uerfora.
ted by four glass tubes The copper lar
- then placed In a pan OF ordinary water.
the best or which causes the liquid ain
TO expand instantly and blow upward
through the tubes perfect geyser Of fine
Vapor, like the exhaust of steam engine.
IL IS a curious thing to see LIQUID air
placed in teapot, boiling vigorousIv IN
a block OF ice, but II must be remamhared
that ice is as much warmer than l,ouia
ar as q stove is warmer than water. SO
III IiFsFa4A f.4.
stove makes water boil. If this same tea-
pot IS placed over a gas flame. a ffacIr
coating OF Ice will at once collect On The
bottom between the kettle and the blaza
ana no amount of heat seems enough 10
melt it. -
turning Steel Like a Pine snIInter
As | said BEFORE when the lio,,ia nitso
gen boils away from liquid air If leaves
pehtnd almost pure liquid oxygen. I.loi,id
oxygen is a most marvellous substanea
~ the production Of rapid combustE,n
Mr. Iripler places a little LIQUID oxygen =,
tumpler made of ice. and then thrusfs
INTO y steel spring having at the end
lighted match. The moment the stael
strikes the oxygen 1t burns like 4 snlIrtar
OF rat pine This experiment shows q
most astonishing range of temueratnra
Here Is steel burning at 800 degrees ahova
zero IN an ice receptacle containing Iiou;d
air at Sl2 degrees below zero. In the
same way, II liquid air is thrown on wool.
en- felt, which under ordinary cireum-
stances win not burn at all, it causes
the felt, when ignited, to explode ana h,,r,
with all of the violence OF gun cater
From the last named experiment Mr., Trin-
Ter indicates the use to which LIQUID air
may be placed in making explosives.
The tremendous expansive power Of lio-
uid air, which is about 100 times thar ~
steam, gives a convincing idea of the won
derfui uses to which the substance NAV
be placed for producing power for r1n-
ming all kinds of machinery. NToreo,ar
liquid air boils and produces expansive
vapor at the ordinary temperature Of The
atmosphere, requiring no coal or other
substance for generating heat.
Ray Stannard Baker,.