Star.
London, England, 1813-12-11 00:00:00

NAVAL INTA

f_g

ARR. DIM
1 1 I Heligoland
O s Gottenburgh
0 1 Gperrecey
O 0 Jersey -
- 0 1 Holland
FALMOUTH, DECEMBER Y.
Put back the HELICON sloop of war, having been
run foul of by the Robert Tud, bound to the Brazils,
and she received considerable damage. Wind E.N.E.
PLYMOUTH, DECEMBER 9.
Ariived his Majesty's ship CitALtexuan, from
Passdget, frott which the PRINCE of ORANGE landed
this morning; and ACHATES sloop of war, from a
cruize. Sailed the Surtsts man of war, to Ports-
mouth.—Wind E.

Att. PUS.

Dublin
erfoid
Ca&
Lisbon
Corunna

. 0 $
- 0 0
- 0 1
- 0 1
. 0 0

PORTSMOUTH, DECEMBER • 10.
Arrived his Majesty's ship Isrett (a new frigate)
from the Downs ; Elphinstone and Neptune, for the
East Indies.—Wind E.

DEAL, DECEMBER 10.
The wind has blown hard all day, which prevented
the remainder of the troopi from embarking. Came
down from the River the Lady Melville, for the East
Indies ; Davis, Duchess of Bedford, Robert and Li-
berality, for St. Andero ; and several more, (particu-
has not known) and sailed under convoy 'of the
CORDELIA sloop of war, to Portsmouth.—Remain his
Majesty's sh!ps as per last. —Wind E.

THE LONGITUDE.

TO THE MEMBERS OF THE SOCIETY
FOR Vie ENCOUnAOlugasix OF altFs, MANUFACTC&ZS,
AND Coamine, IN GRILAT BRITAIN.
MY Leans AND GENTLEMEN—AII attempts at in-
vention to find out the longitude having hitherto
failed, it would seem as if the Auinna of /larvae had
purposely placed out of our immediate reach those
things requisite for our comforts, witholding them
till, by exercising our reason, we might get an in-
sight into his works, and aamire his infinite wisdom.
While the present infant state of our sciences de-
nits us the means of ascertaining the longitude at all
times by the accuracy of our instruments, recourse
should be had to the indications pointed out by the
Heavenly bodies; and it is admitted, that the fre-
quent immersions and emersions of Jupiter's satel-
lites in the shadow of their primary planet would be
the best adapted for that purpose, did not the rolling
of the ship prevent all telescopical observations at sea.
Though I may be. justly blamed for presumption,
in attempting what men of real talents have so often
tried in vain, the importance of the subject itself will
plead my excuse for intruding on your notice.
Two telescopes in a frame, constructed in such a
manner as to turn on the same axis, are to be pointed
to Jupiter's system ; one having sufficient power to
view his secondary stars, taking in as great a portion
of the Heavens as the nature of the experiment may
admit ; the other, so great a space, that an observer
,on deck may keep Jupiter on the glass independent
(of the motion of the vessel.
Ici this instance, all difficulty seems to be out of the
question ; for that planet, even under favourable cir-
cumstances for longitudinal observations, being at
night always, and in the day nearly, visible to the
naked eye, requires no high powers to distinguish
him. On the object-glass of this telescope is to be a
wire ring, of a oircumference nearly equal to, and
corresponding with, the same portion of the heavens
taken in by that of the satellites; so that, one obser.
ver having the primary planet constantly in his view,
by accommodating his hand to the rolling of the ship,
may keep it within the wire ring, in order that the
other may observe the precise moment of a satellite's
vanishing, or re-appearance. In terror I am of ex-
posing my ignorance, in suggesting plans, which,
from their apparent simplicity, it is not improbable,
would have been long since proposed by others, were
they founded on principle; yet my private fortune
will not enable me to make the necessary experiments
to satisfy myself.
The encouragement, however, which was bn a
former occasion extended to me by the Government,
and the manner in which 1 was rewarded for another
attempt not necessary here to detail, has induced
this further endeabour for the service of my country,
though at the risk of incurring, by its failure, the
censure of having aimed at an object far beyond my
abilities. Should they fail, I may rely on your
indulgence, particularly as I can shelter my weak-
ness under the numerous unsuccessful attempts of
this nature, which have already been matte.
I leave them, therefore, in your hands, in perfect
confidence should they be deemed worthy of attention,
the experiment will not only be made, but brought for-
ward with every advantage by a Society so active and
liberal in the promotion of useful knowledge.
My Lcrds and Gentlemen,
I remain•your most obedient servant,
JeFFRIEs KiNtatarr,
Licetspeat, 3d Dragowts-

Canterbury, Dee. 1. ISIS.