The Sun.
London, England, 1824-02-23 00:00:00

ROYAL NAVY, &c.

PORTSMOUTH, FEB. 21.—We have intelligence from Ja-
maica to the 11th ult. The Isis, JO, Capt. 'r. Forrezt, C-8.,
sailed from Port Royal on 25th December, for Santa Martha,
Carthagena, and Chagres, taking James Henderson, Esq. Con-
sul-General to Colombia ; Tho Mas Tupper, Esq. Consul for
baguira; Henry Watts,-Esq.-Consul for Carihagena ; and
Malcolm Macgregor, Esq. Consul for Panama. The Argus,
IS, Captain Dundas, had .taken James Henderson, Esq. (and
family,) Consul-General to Santa Martha ; and the Assiduous
schooner, had sailed with Robert Sunderland, Esq., Consul for
Maracaibo, with John Hardy, Esq. and Dr. Cousens: The
Gloucester, 74. Captain Lillicrap, sailed on the lOth January,
for the Havannah and England; but she was to wait at the
former place the arrival of Commodore Sir Edw. Owen, K.C.B.
who was gone-in the Pyramus to examine Cochrane's Passage,
at Nassau, in New Providence.

Capi. Chas. Montague Walker is appointed to recommission
the Medina, 20, at this port. for foreign service.—Lieutenants
E. Stevens, to command the Scourge cutter; Henimens and
Hamilton, to the Blanche; Plazenburgh, Samarang; Sherrer,
Hecla ; K. Griffiths, Medina; J. E. Parlby, Albion : Mr.
Cmimmo, Purser to the Blanche.

Sir Humphrey Davy, the President of the Royal Society,
and Sir Robert Seppings, Surveyor of the Navy, returned to
town this morning, after having been enagaged three days at
this Dock-yard, in directing experiments made at the bottoms
of the Semarang, 21, and Manly gun-brig, which were taken
into dock for the purpose ; likewise on, four boats, coppered
under their direction, with a view to ascertain, upon a
large scale, the effect of the galvanic principle, which Sir
Humphrey proposes to apply in a particular manner, for
protecting the copper sheathing on slips' bottoms from cor-
rosion, and, probably, from foulness. The principle, we un-
derstand, is, to render the whole copper on a ship's bottom
Electro.negative, by the application of a certain Quantity of
zinc or iron in close contact with the ship's copper, .or any
part of her bottom under miter, which zinc or iron only will
suffer all the oxidation or corrosion,, preserving the copper
entire.

Yesterday a Deputation from the Portsmouth Philosophical
Society, consisting of the President (D. Howard, Esq.) and
Mr. H. Deacon, waited on Sir Humphrey Davy, to thank him,
in the name of the Institution, for the many very important
and useful discoveries which he had made in his scientific in-
vestigations. The Gentlemen were highly pleased with their
reception, which most courteous. Sir Humphrey con-
sented to become an Honorary Member, and expressed his
readiness to serve the Institution in any way in which it should
be in his power to do so.
A Court Martial has been held three days on Mr. I'. Col-
lins, Master of his Majesty's ship Cyrene, on charges of ne-
glect of duty—not observing the Captain's orders—for having
conducted himself in a very insolent and highly disrespectful
manner to his commander (Captain Grace). The Court (of
which Sir Wm. Hoste, Bart. K.C.B. was President) decided
that the charges had not been proved, and therefore adjudged
Mr. Collins to be acquitted.