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Number 2 Observation Reef : 10 : 13 : 8.2 : 3.5 : 0 1 14 W : - : Dry sand, East extremity of reef : 11 21 30 S : - : -.

1849 : Number 2 Observation Reef and Green Island : 10 : 6 : 5.2 : 3 : 0 26 49 W : - : On Coral Islet, near Green Island (South side) : 11 8 36 S : - : -.

1849 : Number 2 Observation Reef and Green Island : 10 : 6 : 3.2 : 3 : 0 26 48 W : - : On Coral Islet, near Green Island (South side) : 11 8 36 S : Repeated : -.

1849 : Green Island and Duchateau Isles : 10 : 3 : 4.6 : 3 : 0 15 53 W : - : On the North-east extremity of Eastern Duchateau : 11 16 45 S : Repeated : -.

1849 : Green Island and *Middle Duchateau : 10 : 1 : 1.1 : 1 : 0 16 43 W : *1 8 34 E : Rattlesnake's Observation spot : *11 16 51 S : *By triangulation : -.

1849 : Middle Duchateau and Duperre sandbank : 10 : 3 : 1.9 : 3.5 : 0 19 54 W : - : On sandbank East of Duperre Isles : 11 10 48 S : - : AA.

1849 : Middle Duchateau and Lejeune Isle : 10 : 5 : 3.4 : 4 : 0 33 26 W : - : On North-west extreme of the Island : 11 10 38 S : - : AA.

1849 : Lejeune Island and Kosmann Island : 10 : 2 : 2 : 3 : 0 16 52 W : - : On middle of North side of Island : 11 4 20 S : - : AA.

1849 : Lejeune Island and East Sable Island : 10 : 2.9 : 2.8 : 3 : 0 25 47 W : - : Centre of Island : 11 10 6 S : - : AA.

1849 : Lejeune Island and West Barrier Island : 10 : 3 : 2.7 : 3 : 0 40 28 W : - : East end of Island : 11 5 36 S : - : AA.

1849 : Lejeune Island and West Dumoulin Island : 10 : 5 : 4.5 : 3 : 1 4 18 W : - : North-west end, on a detached rock : 10 54 20 S : - : AA.

1849 : Middle Duchateau and *Brumer Island : 10 : 14 : 15.6 : 4 : 2 1 13 W : *0 52 40 W : Rattlesnake's anchorage : 10 45 30 S : - : AA.

1849 : Brumer Island and *Dufaure Island : 10 : 17 : 5.0 : 2.5 : 0 35 20 W : *1 27 43 W : Rattlesnake's anchorage : 10 30 36 S : - : AA.

1849 : Brumer Island and Cape York : 10 : 43 : 17.9 : 4 : 7 48 19 W : - : Sextant Rock, Evans Bay : 10 41 31 S : - : AA.

1849 : Cape York and Darnley Island : 10 : 12.5 : 7 : 2 : 1 13 39 E : - : East end of Treacherous Bay : *9 35 0 S : *From chart : -.

1849 : Cape York and Bramble Cay : 10 : 16 : 10.3 : 1.5 : 1 20 34 E : - : On the centre of the Cay : 9 8 38 S : - : -.

1850 : Redscar Bay and Bramble, off Round Island : 10 : 8 : 7 : 3 : 0 37 45 E : - : On board the Bramble, at anchor : 9 58 53 S : - : -.

1850 : Redscar Bay and Bramble, off Cape Rodney : 10 : 16 : 8.4 : 3 : 1 35 25 E : - : On board the Bramble, at anchor : 10 16 20 S : - : -.

1850 : Redscar Bay and Bramble, off Dufaure : 10 : 21 : 14.2 : 3 : 2 48 41 E : - : On board the Bramble, at anchor : - : - : -.

1850 : Redscar Bay and Bramble, off Brumer Island : 10 : 23 : 17.9 : 3 : 3 27 34 E : - : On board the Bramble, at anchor : - : - : -.

1850 : Redscar Bay and Middle Duchateau Island : 10 : 31.5 : 24.7 : 3 : 5 29 46 E : - : On centre of North side of Island : 11 16 51 S : - : -.

1850 : Middle Duchateau Island and Sydney : 8 : 28 : 41.3 : - : 1 7 30 W : - : Fort Macquarie : 33 51 33 S : - : -.

1850 : Sydney and Bay of Islands, New Zealand : 7 : 18.5 : 7.1 : - : 22 55 24 E : - : Kairaro Island Kororareka Bay : 35 16 0 S : - : -.

1850 : Bay of Islands and Falkland Island : 7 : 57 : 95 : - : 128 3 9 E : - : Near Chaplain's House, Stanley, East Falkland : 51 41 19 S : - : -.

...

The following is a summary of the results obtained from the Chronometric measurements of H.M.S. Rattlesnake and Bramble, giving a proportionate value to each, according to the number of T.K.'S employed.

COLUMN 1: SPOT OF OBSERVATION. COLUMN 2: MEAN MERIDIAN DISTANCE FROM FORT MACQUARIE, SYDNEY. COLUMN 3: EAST OR WEST. COLUMN 4: LONGITUDE EAST OF GREENWICH, ASSUMING THE LONGITUDE OF FORT
MACQUARIE TO BE 151 DEGREES 14 MINUTES 47 SECONDS EAST. COLUMN 5: OBSERVED LATITUDE SOUTH. COLUMN 6: INSTRUMENT USED TO OBSERVE LATITUDE. COLUMN 7: INITIALS OF OBSERVERS OF LATITUDE.

O.S.: Captain Owen Stanley. C.B.Y.: Lieutenant C.B. Yule. J.D.: Lieutenant J. Dayman. W.H.O.: Mr. Obree.

Parramatta Observatory : 0 13 13 : W : 151 1 34 : 33 48 50 : From Nautical Almanac : -.

Eden Jetty, Twofold Bay : 0 17 53 : W : 149 56 54 : 37 4 20 : Circle : O.S.

Gabo Island : 1 18 13 : W : 149 56 12 : None observed : - : -.

Lighthouse, Point Gellibrand, Port Phillip : 6 19 29 : W : 144 55 18 : 37 52 31 : Az. and Alt. : O.S.

Lighthouse, Kent's Group : 3 55 11 : W : 147 19 36 : 39 28 58 : Sextant : C.B.Y.

Rossbank Observatory, Hobart : 3 52 39 : W : 147 22 8 : 42 52 10 : Circle and Az. Alt. : O.S.

Tahlee House, Port Stephens : 0 47 15 : E : 152 2 2 : 32 40 18 : - : Captain King.

North point of Lagoon Bay, Port Dalrymple : 4 24 56 : W : 146 49 51 : None observed : - : -.

North Solitary Island : 2 10 35 : E : 153 25 22 : 29 56 8 : Sextant : C.B.Y.

Moreton Island watering-place, North-west end : 2 9 28 : E : 153 24 15 : 27 5 44 : Sea horizon Circle and Az. Alt. : O.S.

Observation spot, West side Facing Island, Port Curtis : 0 8 36 : E : 151 23 23 : 23 51 45 : Az. and Alt. and Sextant : O.S., C.B.Y. and J.D.

Port Molle, near Sandy Bay, East side of harbour : 2 21 53 : W : 148 52 54 : 20 19 48 : Az. and Alt. : O.S.

Cape Upstart, Sandy Bay near Cape : 3 27 37 : W : 147 47 10 : 19 42 3 : Az. and Alt. : O.S.

Mound Islet, Rockingham Bay : 5 3 27 : W : 146 11 20 : 17 55 25 : Circle : O.S.

Fitzroy Island beach, West side : 5 13 27 : W : 146 1 20 : 16 55 57 : Circle : O.S.

East Hope Island, beach on West side : 5 44 52 : W : 145 29 55 : 15 43 45 : Circle : O.S.

Lizard Island, sandy beach West side : 5 44 45 : W : 145 30 2 : 14 39 56 : Circle : O.S.

West Pipon Island, South-west side : 6 40 59 : W : 144 33 48 : 14 7 9 : Circle : O.S.

C reef dry sand, off Restoration Island : 7 42 24 : W : 143 32 23 : 12 34 50 : Az. Alt. : W.H.O.

Sextant Rock, Evans Bay, Cape York : 8 41 33 : W : 142 33 14 : 10 41 31 : Az. Alt. : W.H.O.

Port Essington, Government House : 19 5 23 : W : 132 9 24 : 11 22 2 : Az. Alt. : W.H.O.

Booby Island : 9 19 51 : W : 141 54 56 : 10 35 56 : delta n : -.

Bramble Cay : 7 21 23 : W : 143 53 24 : 9 8 38 : Az. Alt. : W.H.O.

Pariwara Island (North side) Redscar Bay : 5 9 25 : W : 146 5 22 : 9 14 25 : Az. Alt. : W.H.O.

Middle Duchateau Island : 1 7 50 : E : 152 22 37 : 11 16 51 : Circle : O.S.

Number 1 Observation Reef, Coral Haven, Louisiade : 2 4 48 : E : 153 19 35 : 11 18 39 : Circle : O.S.

Kairaro Island, Bay of Islands, New Zealand : 22 54 40 : E : 174 9 27 : 35 16 0 : Sextant. : W.H.O.

Chaplain's House, Stanley, East Falkland : 150 57 49 : E : 57 47 24 : 51 41 19 : Az. Alt. : W.H.O.

...


APPENDIX 3.

OBSERVATIONS OF THE MEAN MAGNETIC INCLINATION, MADE ON SHORE IN THE VOYAGE OF H.M.S. RATTLESNAKE, BY LIEUTENANT J. DAYMAN, R.N.

INSTRUMENTS EMPLOYED: ROBINSON'S 6-INCH INCLINOMETER; FOX'S DIPPING APPARATUS.

The following tables contain the absolute determinations of the magnetic inclination and declination made in the Voyage of H.M.S. Rattlesnake on shore. A very large series made almost daily at sea with Fox's instrument and the Azimuth Compass require several corrections before they are fit for publication.

In degrees, minutes and seconds.

...

MADEIRA.

In Mr. Veitch's verandah, Funchal, by Robinson's Needle, A: 59 41 7 N. In Mr. Veitch's verandah, Funchal, by Fox's Needle, A: 60 40 2 N. On the summit of the Pico dos Bodes, by Fox's Needle, A: 64 10 5 N. Ther. 64. on the summit of the Pico dos Bodes, angle of deflection, 2 grains by Fox's Needle, A: 33 13 6. Ther. 59. Funchal angle of deflection, 2 grains by Fox's Needle, A: 38 8 8.

RAT ISLAND, RIO DE JANEIRO.

By Robinson's Needle, A1: 12 15 1 S. By Robinson's Needle, A2: 12 19 1 S. Mean: 12 17 1 S.

SIMON'S BAY, CAPE OF GOOD HOPE.

In the dockyard near the Observation spot of Erebus and Terror, by Fox's Needle A, with index error applied : 53 40 0 S.

TONNELIER'S ISLAND, PORT LOUIS, MAURITIUS.

By Robinson's Needle, A1:
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