New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1898-03-13

Tho licuid remairs still too. But II q single
walled globe Of the same size and neck be Used.
The. contents will boi! gently and disappear In
about twenty or thirty minutes. In the mean
time a delicate visible white vapor will slowly
rise into and overflow from the Orifice.
The fingers may be plunged quickly into dip
pcrfu Of this queer fluid without any serious
effect il they be withdrawn promptly. Inc
fingers come out dry, not wet. ana during the
momentary immersion only sensation OF cool
ness Is felt. A thin wall OF vapor which is IN
stantly formed about the fingers protects them
for a second, or fraction Of second. But iet
them stay there for longer period, and they
would he seriously burned. In like manner
few drops may be poured out into the palm OF
the hand without harm IL shaken oil to the moor
almost Immediately. While lying in the hollow
Of the hand the liquid shows a tendency to
gather itself up into spherical shapes and to
separate itself into distinct globules
Apply a warm hand to the exterior OF the
globe or to a thin tumbler containing liquid air,
and the contents will boil more vigorously and
emit this vapor more profusey A single finger
inserted into the open mouth Of the globe. but
without touching the surface Of the liquid will
hasten the vaporizing process. so that the digit
itself appears to give off steam When boiling
the liquid air is white and Opaque as milk
owing to the large number Of small bubbles de-
veioped therein. Pouring water into dish con-
tanning liquid air results In the conversion OF
the former element into ice. although the latter
fluid is boiling vigorously in consequence.
chunk Of this ice too, will produce ebullition. or
if a lumber containing liquid air be partially
immersed in "A basin Of cold water, the latter
will produce the same effect
Here is ore CT Mr.. TripIer's prcttiest demon
STATIONS A thin straight-sided glass tumbler
IL half filled with liquid air and then set into a
ba sin Of water two and one half or three inches
deep. so intense is the cold produced by the
evaporation of the air that film of ice is
ouirkIv formed on the out side of the lumber.
When this shell has acquired a thickness OF an
eighth of an inch it may be detached from the
lumber now once more empty. by pouring into
the glass a little water. Thereafter the ice film
is manipulated with cotton handkerchief. Hold
ing the shell in one hand. Mr.. Tripler pours into
it with the other half an inch or an inch Of
liquid oxygen A burning match, at the end OF
a foot or two Of steel wire or ribbon. is now
dipped into the fluid Instantly the end Of the
wire begins to bura scintillating beautifully.
Sparks fly in all directions for a distance Of
foot or two.
There you have very fine temperature con
trast" says Mr. Tripler. THE burning steel
represents about 2,0D degrees above zero. The
ice cup and oxygen mean 300 or more below
For another pleasing experiment Mr.. Tripler
took a globular glass vessel, ten or twelve
inches In diameter and looking like huge
carafe, except that its walls were smooth and
thin. 1t was nearly full Of water. Into the open
mouth was poured tumberfuI of liquid air.
This being a trihe lighter than the water.
hoated in n layer which at first was an inch or
In thickness. The downward impulse ac-
CURED from the act Of pouring it in caused lit
tie oscillation OF level for Il moment or two.