New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1881-09-26


but of chemically prepared paper, this time is fas
tened to the Havre tablet. AS the Paris cylindrical
tablet rocks back and forth, and at the same
tlme by automatic machinery, is pushed length
wise in the direction of its axis an elastic wire
point connected with the circuit, grazes success
sively every spot of its surface So long as the
POINT is merely scraping away at the bare tnto
the electric connection Is complete the current
is kept within the limits of the
Paris apparatus, and the Havre cylinder and paper
are undisturbed. AS soon however as tho point
meets the greasy ink. the Paris short circuit is in
terrupted. away flies the current to Havre. and
" goes to ground" through the Havre wire-pont.
chemical paper and foil. staining the paper as it
passes in point exactly corresponding to the
grease sDeck which broke the current in Paris
When the two tablets have rocked and wrggled
their whole length along uiuer the win points
getting through, Of course at exactly the same
time, though hundreds of miles apart each grease
speck on the Paris foil has its corresponding stain
on the Havre paper; hence the reproduced sigma
ture
PuZZling rs this may sound to anyone not having
machine or diagram before him, it yet seems worth
while to make little effort to get at least a general
notion of n process which has caused as much be
wilderment and surprise, perhaps, any later
electric discovery. mans signature is conven-
tionally esteemed the next thing to the him
SELF and if we can telegraph the one. who can say
how long before the other WILL in the picturesque
language of Jack aud Gill; come tumbling AFTER ~
The elements of this the Caseli process which has
now been known for some years. seem essentially
he same in the other methods ore of which is on
view In the pavilion. They all have pcndu-
INNS to insure corresponding movement all break
the current at the transmitting end by ink marks
or ndented ratchcs, and all stain paper by means
of rocking or revolving cylinder at the receiving
end.
Unable TO spend more time over the wonders in
the Partition des P0StcS, hurry on towald the
northwest corner. where minute cucking and
twttering suggests whole poultry yard in full
operation Are eggs, then. laid and Matched by
electricity Not exactly: for this must still
en- attendant mieur-fal back on natures ime-h on
ored processes. Something however, we may do.
IL is essential that the egg-travs should be kept
an equable temperature so the Houdan ipcRba-
eHr, or hatcher the rising falling mercury of an
electric thermometer carries metal plug which, nt|
the proper points. makes or breaks circuit calls the
attendant, and turns of the heat! Just at hand
stands the gaceuse stufer which enables the at
tendant, by a 'readle and pipe to pump a definite
measure of porridge into the gullct of the long
suffering fowl. all in an instant. 1t does not ap-
pear, so far, to work by electricity. 1t would he
well for NJ Houdan to add this essential detail i
then. if he wor Id bring it over and set it up in
of the famished but impatient broker would back
him for fortune
AS main feature of the machinery on the south
side was the dynamo acting as q producer of elec.
trio current, while itself moved by steam power WEI
have here by the north wall lot If applications Of
the converse process. the same dynamo, but fed with
currents from outside and used to produce circular
motion. just under the gallery stands n huge
machine iabourdJe. in other words an electric cul-
tlV3tOI finn
torrents of water back into its own cistcrn. Near
by we come upon whole machine shop, grinding
wheels, lathes. planning racks, etc, all moved by
the same odd-lo6king little black Gramme or
Siemens motor. The force is beautifully APP
piled in tho next exhibit. model several yards in
area and height, and captally realistic, of a sectiou
of coaminc, with great drills all set in order TO be
worked by the motor. Apparatus for compressed
air and other forms of drills stand beside it, appa
rently to afford chance for comparison ana on
the ground lie big cores OF rock cut out by their
savage teeth. exactly the takes ont the core
of apple before CONSUMING the fruit to its destined
dumping.
Against the north wall stands another group of
'ocOmobi}es with their splendid lanterns as if toI
point out the enemy to the park of smooth, brown
ritled feld-guns next in the line the contribution
of the War Office. for ascertaining by electric
obSer 0ation details OF windage, recoil, force of
charge, impact and the like. Notice that immense
wooden section model Of n 5OO-pounder siege gun
with endless little devices stuck into the chamber
and along the bore, to tell the electrician ali he
wants to know. Time was when a Columbiad was
la great hulking, black, ugly monster which went
of for all in its brutal fashion, did lis destined
damage-or missed it-and then held its peace
What was known of its true nwardness was, at
best, vague, rude and empire But now comes the
scientist aId sets il graduated springs and pro-
vides soothing sympathetic cushions for it to back
into, and stuis its with keys and commute,
tors and hangs garands Of bobbns and wires
round its neck, ana touches of the transformed
toDl-Boom And before the simple bystander has
got the singing out of his ears and the smoke out of
his eyes, 10 the cunning philosopher reads YOU
whole history of the complicated forces Mt work IN
that apparently simple bang! One point which
has been noticed is pointed out to us by Commits
sioner Mclean that the recoil is found to he more
violent perceptible instant after the proiectiJe
has left the muzze! Again that droll analogy with
human constitution. The creature-dOn't Won see ?
lis confused at first with the intensity of it's own
emotion and doesn't get real mad till it has
hsd time to think the matter and an alyze its
sensational
Just across the way stands big railway truck
the body removed to display the electric brake. AS
simple as b0njour! On the car-axle plays freely a
clutch ring at the end of a strong chain. The
brakeman makes electric connection and the cold
Indifferent car-aXle turns magnetic; with the ring
clinging to it in spasmodic grip it rapidly rolls up
the chain down go the connecting levers and the
brakes of any ordinary pattern, take hold. Look
too. at that handsome dynamometre, or in plain Eng
lish, experimental railway car, smooth and simple
outside. but inwardly teemng with all delicate APP
pances for studying tractive force, friction and
such other matters which the practical railway man
should know.
Near at hand we find, among the dynamos and