Daily Nashville patriot. [volume] (Nashville, Tenn.) 1857-1858, 1857-07-27
tFrom=he London News, July II
The Atlantic TeIeRraDh.

The preparations for this grand international en-
terprise are now rapidly approaching completion,
and there is every reason to believe that by the
end Of this month the AgamemHOn ard Niagara
will have commenced depositng in the Atlantic the
cables which will, it il to be hoped cement the am
icablr, political and commercial relations of Eng
land and the United States Both these vessels
far advanced 10 the work of shipping the cable
one at Brkenhead, where Messrs. Newall 4 Co.
are under contract TO supply one-half the entire
length, and the other below Greenwich Hospital,
where the other half is being supplied from the
works of Messrs Glass, Elliott, Co., Of East
Greenwich. Each firm has undertaken TO furnish
twelve hundred and fifty miles, and the total dis.
lance from shore to shore being l 300 statute
miles, there Will of course be surplus Of 500
miles, a margin which is believed to be be amply
sufficient to pr0vide for all exgencies and eonIin
geucies which it is reasonable to anticipate.
As already intimated, the total quantity of cable
to be received is l ,25O miles. Each coil at the
center forms length of about st miles, and the
weight OF the cable is about per mile. 1t
is expected that the whole of the cable will be on
board by about the goth inst and that by the 2Sd
the 25th the Agamemnon will be on her way to
Cork, where she is TO join the Niagara. The pre-
else course then to be pursued regards the pay
ing out of the cable by the two vessels is not yet
determined. Much, of coarse, depend upon
wind and weather, and provision will doubtless be
made for al tue contingencies which wise fore
sight and the concurrence of the most experienced
heads can anticipate.
The operations of Greenwich are under the act
tive superintendent Of TWO of the greatest cleo
tTicians of the day, DR.. WhiIehouse of this coun-
try, the chief electrician of the Atlantic Telegraph
Company, and Prof. Morse of the United States.-
These gentlemen both doing all in their power
to insure success to the enterprise. They in
constant communication with each other, and their
Intercourse will no doubt be as beneficial as regards
the ad Vancement of Ieegraphing in general it is
tn ma and
ordinary requirements which have sprung out of
the pending experiments. in turtherance OF this
object DIR. WhIteLouse has been for some time en-
gagged in some interesting Investigations with
gard 70 the time occupied by the transmission Of
electrical currents for immense distances IN the
ocean, and he has invented a scrutiuiziug agent
which at Gnce ascsrtains differences and places the
results record, that they be examined
and compared and made the basis of future disCOY
cries and improvements
The basis Of this instrument is ribbon of paper,
chemically prepared, uDroled from drum. An
application of Professor Morse's printing machine,
which with the aid of local batteries, impresses
marks on the ribbon; aud second pendulum, whose
vibration transmits electrical currentI in opposite
dire cDHs along the wire each beat or semI-beat.
The fl CT of the process is that there three
parallel rows OF marks impressed on the surface
OF the paper-the lnneTmOsi re presenting the home
signal the next the distant signal and the third the
seconds. From the relative position of the marks
may DC learnt the velocity OF the several CuFrc nt5
and the Interval between each, and the main OBJ
jects OF the experiments, which are entirely novel
having arisen out OF the special requirements of
the Atlantic enterprise, Is, Of course. diminish
the period necessary for exchanging signals
In connection with this point it may be remark
ed that DR.. WhitehOuse has actually devised Il
mode of weighing the force Of electrical currents.
Hitherto there has been means whatever OF as
pertaining this. ali that could be said of a par
ticular current, so far its force was concerned
that it slight or considerable, as the case
miA BIT be- By means of this wonderful invention
a curreI t, after it has travelled a thousand miles,
may be weighed with the utmost nicely, achieve
ment which hardly fail 70 be attended With the
most important consequences in connection with
the extension of submarine communication.