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Observations for Longitude, by the Eclipses of Jupiter's Satellites.

Apparent time 1790.

Satell. Weather. Im. or Em. Longit. in time. Longit. in deg.

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Mean Longitude of Danish Point, East from Greenwich 93 21 30

The Telescope was a refractor, magnifying from 80 to 90 times.

Pumbank Island, on board the Experiment Cutter. The Southern extremity
of the Island bearing East.

February 10th, Sun's meridian altitude

Do. by Capt. Kyd

67° 18′ 30′′
67 18 0

Mean 67 18 15

Latitude 8° 13′ 1′′

February 15.

CARNICOBAR ISLAND.

Sun's meridian altitude 68° 5′ 30′′

Lat: 9° 5' 31".

The southernmost point of the island bore E. § S.

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Southernmost point of the island bore WS1 mile distant.

Chatham Island in Port Cornwallis*, at the Great

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Observations for Longitude, by the Eclipses of Jupiter's Satellites.

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An excellent chronometer, by Arnold, was used in observing the time; to correct which,
frequent observations of the sun and stars were taken. The former, by equal or corresponding
altitudes, observed before and after noon, to which the proper equations were applied: and in
the latter case by taking several altitudes of a star east, and one west, a few minutes before
and after the observation: these were calculated separately, and the mean of the results was
applied to the correction of the watch. The apparent time, as deduced from the sun or stars,
agreed in general within a second or two.

XX.

Astronomical Observations made on a Survey through the Carnatic and Mysore Country. By Lieutenant R. H. Colebrooke.

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Canopus

24 23 0 13

3 34

3

ß Aurigæ

58.10

0

13

3 52

-13

3 57

Villout Choultry, W by N N 1 mile dist.

"

B Canis Majoris

59 5 0

13

3 38

Sirius

60.30 10

13

3 53

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13 13 14,6 Chitore Fort, N 65 W 11 mile dist.

Sirius

60 20.30

13 13 34

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13 11 38, 7 Moogly Pagoda, W 5 S 4 furl. dist.

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March 2

ẞ Auriga

58 11

0

13

4 52

13

Sirius

60 29 45

13

4 19

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12 27 59

13

a Ursa Majoris

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Do. by Lt. Bushby

25

y Ursa Majoris ·

....

39 34 12 47 35 45

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♪ Ursa Majoris.

Ursa Majoris...

» Ursa Majoris.
Centauri

& Ursa Majoris. " Ursa Majoris...

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12 25 44
12 25 41
12 26 14
12 26 19
12 26 41

0 Centauri

42 8 30 46 45 45 52 24 30 41 56 10

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52 11 5012 32 47

12 32 39 12 46 2 12 45 24 12 45 1

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Palmanaire, S 60 E 1 mile dist.

4 35, 5{ Oosscottah, N 72 W 1 mile 6 furl. dist. Santanoor, N by E 2 furl. dist.

12 25 42,5 Arakeeree Fort, SE 2 furl. dist.

12 26 24,6 Kanambaddy, W 1 mile dist.

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Binnelly Village, W furl. dist.

Hoolior-droog, N 74 W 4 miles dist.

Tondanoor Village, N N W 6 furl. dist.

◊ Centauri...

41 35 20

12 47 47

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