The fourth (interval of days) is the elapsed time between the last day at the first station and first day at the second.

The seventh (meridian distance in arc) is the result of the particular measurement specified between the two places named.

The eighth (mean meridian distance from Sydney) is that deduced by a mean value of two or more distances by the same T.K.'s, and in some instances of ONE ONLY, in some of the princ.i.p.al stations connected with the survey.

The times throughout these abstracts have been determined by equal alt.i.tudes of the sun, excepting in those instances where the contrary is specified by A.A. The interpolations in the Rattlesnake's distances have been calculated by Owen's method: those of the Bramble by a method of Lieutenant Yule's.

In the Rattlesnake's distances interpolation has been employed throughout; in the Bramble's only where an intermediate distance is measured between two rates.

The asterisks point out the place to which the mean meridian from Sydney refers.

ABSTRACTS OF MERIDIAN DISTANCES MEASURED IN H.M. SURVEYING SHIP RATTLESNAKE, BY CAPTAIN OWEN STANLEY, R.N., F.R.S.

COLUMN 1: YEAR.

COLUMN 2: PLACES MEASURED BETWEEN.

COLUMN 3: NUMBER OF T.K.'S USED.

COLUMN 4: INTERVAL IN DAYS.

COLUMN 5: EX. DIFFERENCE OF RESULTS IN SECONDS OF TIME.

COLUMN 6: RANGE OF TEMPERATURE.

COLUMN 7: MERIDIAN DISTANCE IN ARC IN DEGREES, MINUTES AND SECONDS.

COLUMN 8: MEAN MERIDIAN DISTANCE FROM FORT MACQUARIE, SYDNEY IN DEGREES, MINUTES AND SECONDS.

COLUMN 9: SPOT OF OBSERVATION.

COLUMN 10: LAt.i.tUDE OF SPOT OF OBSERVATION IN DEGREES, MINUTES AND SECONDS.

COLUMN 11: REMARKS.

1846 : Greenwich and Madeira : 14 : 10 : 7.7 : - : 16 53 22 W : - : Mr.

Veitch's Garden, Funchal : 32 37 42 N : 16 53 22 West of Greenwich : -.

1847 : Madeira and Rat Island Rio de Janeiro : 12 : 31 : 31.6 : - : 26 14 38 W : - : Rat Island Rio de Janeiro : 22 53 30 S : 43 8 0 West of Greenwich : -.

1847 : Rat Island Rio de Janeiro and Simon's Bay : 12 : 36 : 50 : - : 61 32 52 E : - : North-west end of Dockyard, Simon's Bay : 34 11 28 S : - : -.

1847 : Simon's Bay and Mauritius Island : 13 : 28 : 20 : - : 39 1 6 E : - : West side of Tonnelier's Island : - : - : -.

1847 : Mauritius Island and Hobart, Van Diemen's Land : 14 : 40 : 40 : - : 89 45 43 E : - : Ross Bank Observatory : 42 52 10 S : - : AA.

1847 : Hobart and Sydney : 11 : 11 : 5 : - : 3 52 39 E : - : Fort Macquarie : 33 51 33 S : - : AA.

1847 : Sydney and *Parramatta : 10 : 1 : 0.6 : - : 0 13 13 W : *0 13 13 W : Parramatta Observatory : 33 48 50 S : *By the Bramble's T.K.'s : -.

1847 : Sydney and *Twofold Bay : 9 : 3.5 : 3 : - : 1 17 53 W : *1 17 53 W : Jetty at Eden, Twofold Bay : 37 4 20 S : *By the Bramble's T.K.'s mean of 2 measurements : AA.

1847 : Twofold Bay and *Gabo Island : 8 : 5 : 2.1 : - : 0 00 37 W : *1 18 35 W : Landing-place on West side : 37 34 0 S : *By the Bramble's T.K.'s mean of 2 measurements : AA.

1847 : Gabo Island and Fort Macquarie : 8 : 4 : 9.5 : - : 1 18 40 E : - : Fort Macquarie : 33 51 33 S : *By the Bramble's T.K.'s mean of 2 measurements : AA.

1847 : Twofold Bay and Fort Macquarie : 9 : 9 : 12.6 : - : 1 17 54 E : - : Fort Macquarie : 33 51 33 S : *By the Bramble's T.K.'s mean of 2 measurements : -.

1847 : Fort Macquarie and Moreton Island : 16 : 8 : 8 : 60 to 81 : 2 9 59 E : *2 9 30 E : Watering-place near the North-west end : 27 5 44 S : - : AA.

1847/8 : Moreton Island and Fort Macquarie : 15 : 10 : 10 : - : 2 8 25 W : *2 9 30 E : Fort Macquarie, Sydney : 33 51 33 S : *Mean of 3 measurements : -.

1849 : Sydney and Moreton Island : 17 : 7.5 : 15 : 62 to 75 : 2 10 7 E : *2 9 30 E : Watering-place near the North-west end : 27 5 44 S : - : -.

1847 : Moreton Island and *Port Curtis : 16 : 12 : 14 : 71 81 : 1 59 59 W : *0 8 37 E : West side of Facing Island, Port Curtis : 23 51 45 S : *Mean of 2 measurements : -.

1847 : Port Curtis and Port Molle : 15 : 11 : 8.3 : 64 84 : 2 30 48 W : - : 1/10th mile North of Sandy Bay, East side of harbour : 20 19 48 S : - : -.

1847 : Port Molle and Cape Upstart : 16 : 2.4 : 1.5 : - : 1 5 42 W : - : Sandy Bay, near the Cape : 19 42 3 S : - : AA.

1847 : Cape Upstart and *Port Molle : 16 : 4 : 1.5 : - : 1 5 42 E : *2 21 53 W : 1/10th mile North of Sandy Bay, East side of harbour : 20 19 48 S : *Mean of 2 measurements : AA.

1847 : Port Molle and Moreton Island : 15 : 22.5 : 28 : - : 4 31 59 E : - : Watering-place near the North-west end : 27 5 44 S : - : AA.

1848 : Sydney and *Port Phillip : 15 : 11 : 6.4 : - : 6 18 14 W : *6 19 48 W : Lighthouse, Point Gellibrand : 37 52 31 S : *Mean of 2 measurements : AA.

1848 : Point Gellibrand and Shortlands Bluff : 16 : 3 : 2.6 : - : 0 14 18 W : - : Lighthouse, Shortlands Bluff : 38 16 0 S : - : -.

1848 : Point Gellibrand and Port Dalrymple : 16 : 9 : 12.5 : - : 1 55 30 E : - : North point of Lagoon Bay : 41 5 0 S : Lat.i.tude from Chart : -.

1848 : Port Dalrymple and Sydney : 16 : 14 : 14.2 : - : 4 25 53 E : - : Fort Macquarie : 33 51 33 S : - : -.

1848 : Sydney and *Rockingham Bay : 16 : 31 : 28.9 : 64 to 84 : 5 3 27 W : *5 3 27 W : Summit of Mound Islet : 17 55 25 S : *One measurement : AA.

1848 : Sydney and *Cape Upstart : 16 : 22 : 25.8 : 64 to 79 : 3 27 00 W : *3 27 37 W : Sandy Bay, near the Cape : 19 42 3 S : *Mean of 2 measurements : AA.

1848 : Rockingham Bay and Cape Upstart : 16 : 9 : 8.2 : 73 to 84 : 1 36 32 E : - : Sandy Bay, near the Cape : 19 42 3 S : - : -.

1848 : Mound Islet and Number 3 Barnard Group : 16 : 4 : 3.8 : 71 to 84 : 0 2 18 E : - : Sandy beach, West extreme : 17 40 20 S : - : AA.

1848 : Number 3 Barnard Group and Number 4 Frankland Group : 16 : 5 : 5.5 : 72 to 78 : 0 6 4 W : - : Sandy beach, West side : 17 12 22 S : - : -.

1848 : Number 4 Frankland Group and Fitzroy Island : 16 : 7 : 6.1 : 72 to 79 : 0 5 34 W : - : Sandy beach, West side : 16 55 57 S : - : -.

1848 : Mound Islet and *Fitzroy Island : 15 : 16 : 7.9 : 84 to 72 : 0 9 28 W : *5 12 55 W : Sandy beach, West side : 16 55 57 S : - : -.

1848 : Fitzroy Island and Islet Trinity Bay : 16 : 6 : 4.4 : 73 to 79 : 0 18 25 W : - : Centre of North side of Islet : 16 43 26 S : *One measurement : AA.

1848 : Islet Trinity Bay and Low Isles : 16 : 4 : 2.4 : 73 to 77 : 0 7 23 W : - : North-east point of Western Isle : 16 22 56 S : - : AA.

1848 : Low Isles and East Hope Island : 16 : 10 : 5.4 : 72 to 78 : 0 6 2 W : - : Beach on West side of Island : 15 43 45 S : - : -.

1848 : Fitzroy Island and *East Hope Island : 16 : 20 : 9.1 : 73 to 79 : 0 31 57 W : *5 44 52 W : Beach on West side of Island : 15 43 45 S : - : -.

1848 : East Hope Island and *Lizard Island : 15 : 9 : 3.7 : 73 to 79 : 0 00 7 E : *5 44 45 W : South end of Sandy Bay on West side : 14 39 56 S : *One measurement : -.

1848 : Lizard Island and Number 1 Howick Group : 16 : 3 : 1.4 : 73 to 79 : 0 29 49 W : - : North-west extreme of Island : 14 29 46 S : - : -.