Liberty advocate. [volume] (Liberty, Miss.) 1835-1866, 1845-09-06

CINE is applied to turn round the screw.
The length Of the keel is 289 feet lola
length 1922 feet.
Beam 81 feet depth 80 feet 6 inches
leet OF water when loaded, l6 feet.
Displacement, 1884 tons-tonnage by
Iod measurement, 3443 tons.
Plates of keel nearly an inch thick
plates OF bottom varying to three quar-.
tiers OF an inch at extremes, and 10 five
Ieighths generally.
Topsldes half an inch, and at the ex.
IRENE at 7-l6th,
The ribs are framed Of angle iron,
inches by 81 inches, halfinch thick, anc
7-l6th-distance OF ribs from centre tc
centre, amidships, IA inches, increasin g
to 81 inches at The ends.
Ten iron sleepers run from the engine
room, gradually diminishing in number to
The fore lend of the ship and under the
boilers, The platform of which they sup.
Port-in midships they are 8 feet 8 inches
10 depth, supported by angle irons in the
form OF inverted arches, and at a short
distance from each other.
She has five water tight partitions
slows 1900 tons of coal-l00O tons of
measurement--the engines weigh $40
tons-the boilers 200 tons do. and hold
200 tons of water.
The main shaft is 20 inches in the di.
ameer in the cent re, and "a inches in the
bearings; in the rough, before turned, it
weighed is tons, 1t has been lightened
by hole Of 10 inches in diameter, bored
through. A stream Of cold water passes
through the cranks and this hole when
the engines : re at work The screw shaft
IS in one long and two short, or coupling
parts. The part next the engine, solid,
% feet by Is inches diamet er. The hol-
low intermediate shaft 65 feet by feet 8
inches diameter. The screw part is 25
Ieet 6 inches, and also Is inches diameter.
The total length is 1870 feet, and it weighs
altogether % tons. The screw is of six
arms, Is feet 6 inches diameter, 25 fee,
pitch and weighs four tons-the main
drum is 10 feet diameter, and drives four
chains, weighing seven tons; the screw
shaft drum is six feet in diameter, and The
weight with the phil when working Is
equal TO IS tons on the bearings of the
main shaft. The cylinders are four
II number, 88 inches each: stroke six feet i
power 1000 horses; the condensers are of
ron, IL feet by and 5 deep.
-Four separate steam engines drive
ound the axle Of this monstrous wheel,
wo at one end Of the axle, two at the
ther, the wheel between. The cylin-
ers are placed apart at the bottom of
ne vessel, and the piston-rods, which
'sue out OF them, converge TO the
nds Of the cranks of this wheel. Each
air Of engines works one crank, and the
wo cranks are placed at right angles
ut the chain is the extraordinary thing;
lere are grooves on the wheeI-at The
nd o: each link Of this huge chain there
,e teeth projecting into these grooves,
that as the wheel revoIves, the chain is
mpeIed to revolve with il. AT the bot.
IN of the vessel, Immediately be low the
eat wheel, lies little wheel or pnion,
lving grooves cut in its circumference 4,
the same size, and at the same distance
ON each other, though much less in J.
Imber than those Of the large wheel, the >
me chain passes round both wheels, :
d while the large wheel revoves by :
c power Of the engines once, the small
e revolyes as much oltener as it is small
:. The small wheel has for its axis the l.
is OF the Archlmedes screw, which is /,
ached to the after end of he axis, and .
otrudes through an aperture in the
rn into the water. .
Under the whole space Of the engines, a
to the top, the angle irons are doubled p
The upper main and saloon decks are of il
cd, two cargo decks are of iron. The p
GERS and seamen are all accommoda. il
on two decks under the forecastIe. fo
from the ships bottom to the upper es
ks, runs on either side, for the whole al
9Th of the engines and boiler space ST
Irong iron PARTITION. forming below the ST
! bunkers; and above, the servan rs ac- m
lmodauons on the one side, engineers ar
ms and stoker's Accommodations on the o
er, besides twentysix water closets. tn
he has six masts, fitted with iron rig. VIC
3, adopted in consequence of its offer thu
two-thirds less resi- stance than hemp fru
great point going head to wind. The ser
\ sails of fifty two gun frigate, that tioI
'i;hout counting royals, stay sails and
ring sails, numbering something short
900 yards of canv ass, and the plain lur
Of the Great Brila n amount to 4943 you
$. She carries four large lile-boats as
on, and two boats Of wood in the eve
IS, aud one large life boat on deck; see
are built according to patent taken sale
y Mr. GuPpy, and are capable OF car keel
, 400 people. A short time ago her
oats were tested. One Of them was I
red in the water, tho valves in tn rea
IN heinz so arranged az 10 give free il al