The weekly north Iowa times. [volume] (McGregor, Iowa) 1857-1867, 1858-06-16

From the PhaAdsaphia FrsD.
Atlantic Telegraph. d.
1t is anticipated that, by the end Of
July, there will be regular telegraph'o
communication between the y. Sfae1s
and the continent of Europe. The line
of transmission will be via Newfound.
land to Valentis, in Ireland; Valentis
to Dublin; Dublin to Holyhead. N
Wales Holyhead to Liverpool Law
erpool to Hull, on tie northeast coast
of England, and by Hull, across tho
North Lea to Cuxhayen. at the entrauos
of the Elbe, and thence by land -
Hamburg. the principal terminal e.:
ton on the Continent. It is added
that, "Mr. Powell, one Of the company's
engineers, is now in Hull, preparing for
the transmission Of messages by sound
tho vibrations being produced by
stroks upon a fne-toned bell, entirely
dispensing with the use Of the needle"
The squadron employed for laying
down the cable is expected to leave
Queenstown (the Cove of Cork about
the 10th of June, at which time there
has for the last half century. been an
almost uninterrupted calm in the At
lantic. The London Times says:
"Bad weather, however, in the ordi'
nary acceptation of the term. in those
boisterous lalitudes. even if it does oc-
cur, is no. likely to affect the process
of submerging after it has once fairly
| oonmenced, for the paying out ma
chine is so sufficiently self-acting as to
almost compensate in its action for any
sudden rise in the stern of the vessel to
the pitch of the sea. Both ships. with
the accompanying frigates, make gu
speed to the centre of the space to bs
traversed by the cable, which is about
SO degrees west of Greenwich. Here
the splice between the two halves will
be made without loss of time. =
There is l,50O fathoms water where
this join must be made, and both vessels
will remain stationary until the splice
has we'll settled on the bottom, when the
Niagara will at once steer for the New
World, and the Agamemnon return to
the Old.
Each will steam as fast to her home
ward destination as is consistent with
the safety of the great undertaking. 80
the cable will be either laid or lost with
in twelve or fourteen days from the
starting. The depths to which the Nj.
agara will have to sink her portion vary
quickly and irregularly from 500 to
2, 500 tathoms. or from one and three.
quarters to about three aud half miles
and this is the case also with the Aga.
memnon's portion of the distance. But
on the American side the water shoals
easily and gradually towards Newfound-
land, whereas Oh the British portion of
the ocean the Agamemnon will have to
surmount a tremendous ridge, which
may be called the Andes Of those vast
submarine plains of the Atlantic. 1t
commences at about Is degrees west
longitude, and in the course of a few
miles the water suddenly shoals from
1850 fathoms to $50, Up this vast
rocky precipice-almost as steep a.
the side Of Mont Blanc-the cable must
be laid with extreme care. This diff.
iinulty once overcome, the way thence
to Valentia become comparatively of no
account ....
Experiments, as TO the working ca.
pabilities Of the cable--made with the
assistance of Mr.. Hughes, the Ameri-
can Electrician, whose printing tele.
graph has been So successful in this
country-have not presented such ia
vorable results as were expected, and
show that more than one submarine Ca
BILE will be required to do all the busi-
ness likely to be transacted between
England and the New World.
Until these severe testing experiments
were made, the utmost power of trans
mission by the cable was four words a
minute. AT present as many as eight
words have been transmitted through
the coiled cable. There may be an in-
crease, when the cable is extended in a
straight line. But. allowing that, with
the aid of an immense battery, even ten
words minute may be transmitted.
this would be very slow and inefficient
operation. The average transmission.
by the telegraphs in this country. is
abou. thirty words a minute. 1t will
never do to have only third Of that
speed by the Atlantic telegraph.
It is evident from the cautious man
ner in which the Times and other Eng
lish journals write about the prospects
Of the Atlantic Telegraph. that they
are not extremely sanguine as to it's i'm
mediate prospects of success. In the
words Of ddison
"The broad, the uubounded way Is all before US.
Blu. shadows, clouds, and darkness rest upon it,