New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1858-03-29
THE ATLANTIC TELEGRAPH.
F,em TIE London Tines, March II.

efylOA
&o,lJs s We believe, decided on, and ell the p-epara-
Mons ne cessary successful plan of opera
Soss are rapidly advancing toward completion Since
eur last notice Of the progress OF this great UNDERTAKE
mo the machines az Glasse Il Eniots mandatory
have been working day end light To complete t1e NV
additional miles Of cattle ordered before last thrst-
mss and mt nded TO replace the Si miles winch were
subInereed and lost last Autumn of Naleniia. his
additional length has now been completed. II IL OF
precsely the same b nd OF cable Us the rest, winch
we have already descnbed-iex strong small and
hight has been tested and reesed 70 Insure iSs per-
fect insulation and IT'S completeness beng thus aeh-
nitey sscertaned the last miles Of shipped last
night on board the Adonis screw steamer Tor convey
anee to Plymouth, where II viii arrive On MONDAY
next In the dockyard there, at heyham the nam
bulk Of the cable, To the length of = 200 miles, has
been slowed away in gigantic coils during the Winter,
and full staff OF electricians, under the directions of
Mr.. Whitehouse, have been engaged III WORKING mes
sages throughout its entre length and generally prov
ny the electrical fitness OF the cable 10 the fullest e1-
tent. The result Of these experiments We arenl0rmed
has been in the highest degree satisfactory Most 81
those acquainted with the trt efforts which were made
70 send messages through the entire length OF the
cable know that the re.ardiDg 0huence, or whatever
other name electricians may choose to calwnIch
exists in a long conductor, exercised most serious
Influence upon the rapidly with which 1t was found
possible 20 transmit words through the fun extent oil
the wire Constant experiments, joined with practical
skill in working the wire daily, have enabled Mr..
White house to overcome 70 much OF tins reshabcs
that FIVE words per minute can now be sent through
the ECO miles OF cable at present at heybam ana II
H fully expected that before the time comes Tor ts sec
ond subnerge nent eight words will be transmitted
With ard certainty To many OF our readers unac-
quanted with the practical working OF submarine lines
only eight words per minute may appear to be 0ul
poor result after ALL though can assure them that
fever attained it is such animprovemen 10 the rate OF
transmission as not many ventWed to anticipate VINO
saw the cable worked for the fret time last Summer
At the same time such q result seems to show with
poet convincing ceaness that, though 1870 words per
hour through this line, ii 1t Is successfully Iad down,
might doubtless amply remunerate the Company, II
would still be almost as far as ever IRON acconnood-
ting the business messages between Europe and the
New World. If, therefore, this line is submerged this
Sumner il will follow, matter of course, that three
or four others must be laid az well and there seems no
reason why if one can be laid down. there should not
be many teegrsphs under the Atlantic ~ there are
low under the Chaunel.
When the Adons, with the 40V recently completed
miles arrives at Plymouth on Monday next the addi'
topa length will be immediately landed and joined on
40 the coil already at Keyham. This will raise the
entire length of cable already manufactured TO nearly
2 $50 miles, or some $50 miles or Whereabouts more
than the entire length with which the expedition
started last Autumn. There is doubt, however but
that the first attempt was made with too small al
lowance for casualties and that consequently when the
cable parted, and about $50 miles we're lost IN the
depths of the Atlantic it so reduced the length OF WIRE
remaining at the disposal of the engineers that further
perseverance, in the attempt became almost impos-
sible. To guard against Il recurrence OF this mshap
IL has now been determined to manufacture All addl-
n n ,fU
we have stated is already completed This additions!
quantity will be commenced at Glasse a Ellots
works on Friday next, and will be completed ID
month or So and forwarded to Keyham TO be joined 70
the main coil, which will then measure nearly ooVO
miles IN length. The Niagara and Agamemnon are
again TO be the vessels employed In the attempt OF tale
year. The former was to leave NewSork, we believe,
en- the LIST Of this month"; and Is expected al Pymoutn
bout the 18th or 18th. On her arrival at thst port
abe will instantly taking on board her share
of the immense wire, which this time will amount IN
length to 500 miles, instead of 100 az on the last
occasion. On board the Agamelnnon the csDie VIII
not be coied away in prodgiOus mass arnldshIpS,
but be distributed equally on the fore, Inloshlp ana
after part of the vessel in three coils of about wv
miles each. BY this arrangement, OF course, ine
weight Of the wire is equally olsuiouea anu the sun
well trimmed. The very of this was the case
last Autumn when the weight of the whole M ass was
concentrated amidships, aud, thus balanced on Iue
principle of Chinese toy the poor Agamennon rolled
on the least swell till her yards almost toucheo the
water .
Tho attempt to lay down the cable will be made
shs wear at much earlier period than on the last oc
sssiOp As soon as the coils, with all the necessary
apparatus and appointments, are slowed away on
board the Agamemnon and Niagara, which Will be
ab< ut the beginning Of May, both vessels Will leave
for short trip into deep water, when number oi e&-
periments will be made with the payipg-out machine
~ 10 ASCERTAIN practically if any difficulties exist
in the proposed plan for submerging the wire from the
center of the Atlantic. These experiments VIII De
brought 10 an end in few days, and any alterations
which their results may suggest III tue OAy
manner of paving out the wire having been adopted
as soon as possible the expedition wild finally start
about the beginning of June. All the best authorities
and most experienced sesInen have oeen c9isuIeo on
behalf of the Company TO the state of the weather
in the Atlantic in the month OF June, and we believe
the result of an immense mass OF testimony goes 10
prove that there some i've or SIX consecutive Gays
In hat month during which gale in the Atlantic was
seldom or never known 10 occur The expedition VII
leave these shores 10 arrive IN the center OF the
Atlantic at about the commencement OF these hacyon
days and the object will be, of coue to get over the
deep sea part of the undertaking before the weather
changes. The line will be joined and laid from the
center Of the ocean, the Niagara bringing her end to
England and the Agamemnon conveying hers to
America. Communication by electric signal will, OF
course IL the wire holds be Kept up between the t"o
vessels the whole way.
All these new arrangements and precautions are the
result of the experience OF last year nt,empt anu o.
course all improvements cOnduce toward the chances
OF ultimate But 1t Is no eXaggeraton 10 say
that there one portion of the apparatus upon the
tness and proper of which the success or
Of the whole plan must ultimately depend,
and that IL upon the syingout machinery. IhN tins
machinery was bad last year, and that it was made
stl worse BY the most absurd Encouragement, NJ one
nov denies; but we trust and beGeve that there IS no
shapce OF repetition this year Of such bunders. How
the new machnerys constructed cannot at present
soy, further than that self acting brake has been
devised which s said 10 be perfect that all the alters
tions have been made under the superintendence OF
Mr.. Everett, the Chief Engineer Of the Niagara, aud
Mr.: Appold, and that Mr.. Penn, Mr.. Lloyd, and Mr..
Field have, we believe, been from time to time con-
suited about H. no far then i. ought 10 be al that
can be wished, but We hope to be able 10 speak more
positively this point ina few days Our readers may
reooec that when the attempt failed last Autumu $50
miles ofthe cable safely deposited at the bottom OF
the sea- Since that time, TO the establishment Of all
who know the west coast Of Ireland aud the depth of
water in which the cable lay il has been underrun
and no ess than 81 miles of recovered. Whea the
Isst mile was raised 1t lay at depth OF 600 iathoms
and az !. was in that depth that it broke away, the
remaining $50 miles still in the bed OF the Atlantic
vb.re thew will STAY till the eIG Of time, permanent
-. q .,o,der Nh arnusemept 10 its marine uab