The Sun.
London, England, 1862-03-28 00:00:00

case 6.5 per minute, and in the latter 6.25. The
average number during the whole outward voyage
was 6. ; during the homeward 4.77. The indicated
horse-power developed by the engines of the Warrior
on the trial trip at Portsmouth was 5,471.4, but the
greatest ever developed during the trip to Gibraltar
and back was but slightly over 3,000, and this was
kept up for a very short period only, showing that
on au experimental voyage it is not thought desir
able even to approach the circumstances of a trial
trip at the measured mile. It is highly satisfactory
to learn, however, that, even when unassisted by
her sails, the good ship several times approximated
towards the speed produced at the measured mile,
which was 14.35 knots. On leaving Lisbon for
Gibraltar, for example, with all sails furled, she
ran at more than 13 knots for nearly a day
and part of the time actually exceeded 14 knots.
These aro the kinds of facts with which
Captain Cochrane's diagram abounds, and they
are recorded, not loosely, or in a written report,
but in a rigidly scientific form, and with-
out colouring or modification of any kind. Both
the offieer who recorded them so carefully, and
the Admiralty who permit their publication, cer-
tainly deserve great credit. It should be added
that Captain Cochrane has appended to his diagram
a track chart of the voyage, in order that the ship's
position at any period of it may be known, and a
figure showing the deviations which the ship's com-
pass underwent as she proceeded to sea and. back

again. He even heeled the ship over when in port,
in order to determine the effect which her inclina-
tion exerted upon the compass, so that no pains
should be spared to make the record complete. it
may not be out of place here to state that the
Astronomer Royal has sent in to the Institution of
N

aval Architects, to be read at one of the meetings
this week, an important paper setting forth the
manner in which the magnetic character of the iron
employed in shipbuilding may be improved by cer-
tain modifications in the mode of rolling it. The
compass question will at the same time be explained
with regard to iron cased ships by Mr. Archibald
Smith, F.R.S., and Mr. Evans, of the Admiralty,
and with reference to merchant vessels by the se-
cretary of the Liverpool Compass Committee. AS
the brief letter in which Captain Cochrane submit-
ted his diagram to the institution contains an im-
portant and characteristic expression of opinion
concerning the general qualities of the Warrior, we
will add it here. It is addressed to the Secretary,
and is as follows :

" March 26.

" Sir,—l have the honour to state that the Lords Com-
missioners of the Admiralty have allowed me to forward to
the Institution of Naval Architects the enclosed diagrams,
which I hope may prove interesting, relative to the cruise
of her Majesty's ship Warrior; and I cannot refrain fteo
taking this opportunity of mentioning that the Warrior no'
hayed nobly in the severe gale and heavy sea she encoun-
tered, and that on her return to England she had sustained
no damage, and was perfectly ready to proceed on active'
service to any part of the world.—l have the honour to be•
your obedient servant,

" ARTHUIL A. COCIIRANS.
To E. J. Read, Esq., Secretary, Institution
of Naval Architects, SEc."

Sir J. PAKINGTON read a letter, handed to bid
by a friend and written by Commander Tryon, of
the Warrior, in which the ship was spoken of in
the highest terms.
Sir J. C. D. HAY, M.P., :chairman of the Iron
Plate Committee, in the course of his rerriarks upe°
ships' armour, stated that the report, of the cool'
mittee was now in the printer's han?.is, but that 0°
satisfactory conclusion had been reached as re"
garded the best mode of attaching the armour t°
the ship's sides. He stated, however, the committee
were persuad©d that what is called angulated sides
possessed no real advantages as compared with the
usual upright sides, when all the circumstances °f
the case were considered.

At the evening meeting of the institution, WI
John Laird, M.P., presided, and, after giving a
general description of the Merrimac and Monitor!
and exhibiting drawings of these vessels, he read
an extract from a private letter which he had re"
ceived from a reliable friend at New York, to the
following effect :
" The success of the Rodman gun has induced 0114
Government to try experiments on a scale
larger, and they are about constructing guns 4)
20-inch bore, throwing shot of 1,0001 b., which, it :
thought, will crush in the side of any iron-plated
ship, no matter what the thickness of the plates;
The little Monitor iron-plated gunboat, with revols:
ing tower, built by Ericsson, has proved a .great
success, and withstood a storm of shot and shell for
six hours from guns of very heavy
calibre. I 112
quite satisfied that gunboats will be of more service
e servi
than large ships with iron sides. We are making
rapid progress in building up a navy' effective and
not expensive. It is the intention to make on
power on the ocean equal to that of any other nations
and then we are sure of peace from all parties."
a