The morning news. [volume] (Savannah, Ga.) 1887-1900, 1892-07-26
AS A LIQUID LITTER.

even glasses filled. In the great wine N Ar
ket Of Paris barrels are filed from the
cellar below.
Many elevators have changed from hy-
draulic pressure to compressed air. In this
case the air Is cheaper, costing but Gem
times cubic meter to 80 confines for
water. Ordinarily, however. there is no
| gain IN the item OF expense. Compressed
air costs about the same as steam.
An application which would be a blessing
In the United States is the air telegraph by
which letters are transmitted about Paris
without the provoking delays Of the ordi-
nary mails. Cards are ssnt for 6 cents,
sealed letters for 10 In 1889 the tubes car
RED nearly 10000, 900 pieces Of mail This
idea is used on a similar scale in the French
Bank, where letters are sent from one story
to another by air, and in the Credit Lyon
nals, where packages are transmitted.
Everybody who has studied his "four-
teen weeks" or even less in natural philoso-
| ply remembers that the temperature of
compressed air lowers rapidly when it is al
lowed to dilate and that thus cold is pro-
duced. This property has been skillfully
utilized at Paris. The most elaborate APP
plication is seen under the bourse du Com
merce. An electric motor run by COM
pressed air is in the cellar Of the building.
Connected with the afr motor is a wooden
canal perhaps foot square; into this flows
certain percentage Of The air.
FOR REFRIGERATION.
The canal conducts this to a series Of six
teen small refrigerating rooms below zero
the year around. When | visited the re-
frigerators the temperature was about a
below zero. In one room q freize of snow
aud ice decorated the walls. Butter, cheese,
| fish game, beef, veal, all things which may
be preserved by freezing, are stored here.
The rooms are rented by the year, and the
space is by no means equal to the demand,
| for the house is but a short distance from
tie great central market Of Paris.
l saw In visiting these chambers a very
pretty illustration Of the rapidity with
which cold is produced the instant the COM
| pressed air is released. The wooden con-
duIt which crossed the basement floor
| leaked. On either side Of the pipe fine
snow was steadily falling, hesping up
| drifts which, if diminutive, were none the
| less natural.
The possibilities In refrigeration are limit
| less; especially do the restaurants and hotels
| fnd out this value. Everywhere that the
compressed air runs an electric machine
| refrigerators may be attached without extra
| expense. This cold air is also used some
times In summer for cooling rooms. an
application which undoubtedly will be more
and more frequent in the future.
But it is to the small industries that it
| renders a service the most necessary, Paris
| is full OF craftsmen who carry on small in
| dependent trades. Their work benches are
| sometimes in their living rooms; at best
their shops are narrow and inconvenient
| places.
ITS MANY ADVANTAGES.
Compressed air offers multitude Of ad-
vantages to them. It's motor is small and
| can be put anywhere. The force can be
| conveyed to any part of the room by means
of rubber pipe. They pay for only the
actual force used. 1t is claimed by COM
| pressed air advocates that the expense CI
| conducting small industries has been de-
creased 80 per cent. by the introduction of
the motive power.
You find 1t applied in the most uuex-
pected places. There is a scissor grinder
aud knife sharpener at Paris who occupies
little shop just big enough 10 hold himself
and his machine and where the customer
must do his bargaining from without
through the window, who has a small air
motor attached to his machine. He plies
his trade without the wearisoms treadling
and with threefold greater speed.
The sewing machine is run by It with an
ease aud speed which adds tenfold to the
value of this household divinity. The at
taohment is very simple. The speed can be
regulated perfectly. Both hands are free
| TO guide the work. Partisan tailors use this
force quite generally in their sewing rooms,
much to the joy of their employers.
UTILIZED IN HAND POWER.
Timers, umbrella makers, bookbindsrs.
button makers, embroiderers, all those who
for any purpose use machines which re-
quire other than hand power find m COM
pressed air a safe. convenient, Trustworthy
| servant. Not only does it run the ma
| chimes, but it actually oils them from the
reservoirs, which are kept filed.
But the manufacture and applications Of
| compressed air are soon, il is almost certain,
| to be demonstrated to Americans in a much
| more effective manner than they can be de-
| scribed in newspaper article. Mr.. Popp
is planning an exhibit for the worlds fair,
| In which the entire process will be illustrated
by means Of the latest, most highly per-
fected machines, and where a variety of
applications, bizarre and serious, will be
| displayed. He has asked NJ. Hartogh to 20
with this exhibit and, II he should,
machinery-lovers will find him able and
willing to explain to them in excellent En-
glish-or any other languages If they wish
| all the mysteries and advantages of the
force.
1t only needs, am convinced, a short ex-
position Of the system In America for all
our large cities at least, to see their manu-
| fscturers generating their own electricity,
| running their clocks. propelling their eleva-
tors. venttlsting their rooms, transporting
| their packages, cooling their beverages and
oiling their machines. all from modest little
motors tucked away in convenient corners,
and used by turning a stop-cock more or
| less according to the demands for the force
| which the work makes.