The Sun.
London, England, 1863-11-27 00:00:00

stance, vessels of a similar class, have each been

fitted with machinery constructed with a view to
obtain a greater amount of power at a less working
cost than any yet introduced into the navy- The
Arethusa, is fitted with a pair of expansive trunktke
engines with two cylinders 861 in. in diameter, the
0
trunk being 33in. in diameter, and the length f
stroke 42in., with surface condensers, containing
nearly ttix miles of 1-inch tubing.
The boilers, four
in num'aer, with four furnaces to each,
are fitted
with superheating apparatus. The propeller is
Griffith's patent, pitch 20ft. to 26ft
' made at full
26ft.,
present pitch,
231 t. Daring the trial 6 runs were
boiler power. The results were an average speed
of 11.43 knots an hour ; the revolutions of engines,
65 per minute; pressure of steam 231 b. ; vacuum,
27-tib. At b.aif boiler power only two rails were
made. The results were an average speed of 8.780
knots, 52 revolutions, pressure of steam 161 b., va-
cuum 261 b. The circle was made with full boiler
power, helms port 231 degrees, in seven minutes one
second, the, diameter of the circle being 501 yards;
with haLf boiler power, helm starboard 28 degrees,
in seven minutes 47 seconds, the diameter being 309
yards. The draught of water during the trial was
201. 3ic . forward and 22ft. Tin. aft., the vessel being
tally r'.gged, with guns on board, and in heavy sea-
going trim. The day was fine and the sea smooth,
with a wind from west-south-west, with a force of
from 3 to 5. The trial, which occupied about 6 hours
from the time the vessel left her moorings till her re-
turn, was most satisfactory. Tne Arethusa, with
her sister competing vessels the Constance and the
Octavia, will ,
shortly be placed in commission
and taken. on a competitive trial as to the con-
sumption. of fuel
andspeed, as it is almost impos-
sible to arrive at the exact comparative results in
these respects from a trial of a few hours at the
measu red mile.
In accordance with instructions received at Chat-
ham yesterday from the Admiralty, t he line- of-bAttle
screw steamer Bombay, 500 horse power, is to be
fitted as a flagship for the East Indies. The ship-
wrights and mechanics were employed until a late
hour on Wednesday night in shoring her up on her
bloc'gs on the water being pumped out of the dock.
On ',being docked the Bombay's draught of water
vita 19t 10in aft and 17ft forward. Notwithstand-
ing the long time She was in harboar, her bottom
Nv as found to b 3 very clean, and her copper to be in
excellent pres,:rvation. She will have to undergo
extensive alit( rations to adapt her for an admiral's
ship.

The detac'ament of Royal Marines Light Infantry
selected for service in tl'ie Conqueror, 78, 500 horse,
Capt. W. G. Luard, ordered to proceed to Japan,
assembled at herpiquarters, Chatham, yesterday,
under the commaaad of Capt. T. H. A. Brenan. The
officers and men were inspected by Col. S. N. Lowder,
aide-de-camp to the Queen, and in the afternoon
were joined. by the Royal Marine Artillery, from
Portsmouth ~ atter which the entire force embarked
on board t'ae steam tender which conveyed them.to
the Conqueror, at the No-ce.
The foll.owing appointments were made yesterday
at the Admiralty :—J, E. Datham, master to the
fc.r. the Duncan ; C. E. Gissing, J. C. Witkin-
son, i 5. G. F. Law. and G. A. Gifford, midshipmen,
to the Aurora ; -A:around W. Speck, Ford E. W.
Lo.rabixt, lien ry C. (1. Wynyard, S. F. Daslawood,
and Frederiek Hutchinson, naval cadets, to the
Aurora ; J. S. Shand, nominated to a naval cadet-
ship ; .S.rthtir H. Kelly, assist.-s erg., additional, to
the F:,sge.rd ; Constantine Keenan, assist.-surg., to
-Hospital ; and W. Johnston, assist.-surg., to
the Impregnable,
Tb e Rev. E. J. Hitchings has been appointed
chw,..lain and naval instructor of the Conqueror,
C9l .aniissioned at Sheerness.