Page:A Voyage to Terra Australis Volume 2.djvu/513

 

TABLE I. (Reference from page 31.)

Longitude of the Anchorage in Keppel Bay.

Appt. Greenwich time of the observations.		Place.	Longit. E. from Naut. Alm.			Reduction by survey.	E. Longitude of the anchorage.			Correction		Correct Longit. of the anchorage.			Whence deduced.	Observer.
										for errors of tables	Interv. of ☽'s error.
			°	′	″	′ ″	°	′	″	′ ″		°	′	″
1802 Aug. ʰ    ′ 6 at 15 45	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	At anchor, Port Curtis. — — — —	151 151 151 151 151 151	26 28 38 34 33 27	45 30 45 30 30 45	−22  0 — — — — —	151 151 151 151 151 151	4  6 16 12 11  5	45 30 45 30 30 45	−10 15 — — — — —	Two days. — — — — —	150 150 151 151 151 150	54 56  6  2  1 55	30 15 30 15 15 30	☉ W. ☾ — — — — —	F — — — — —
8 at 18 30	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	At anchor, Keppel Bay. — — — —	151 151 151 151 151 151	6  2 11  8  5  4	15 45 15 30  0 30		151 151 151 151 151 151	6  2 11  8  5  4	15 45 15 30  0 30	− 6 30 — — — — —	Ditto. — — — — —	150 150 151 151 150 150	59 56  4  2 58 58	45 15 45  0 30  0	Ditto. — — — — —	F — — — — —
20 at 11 15	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	Under sail off Port Bowen. — — — —	150 150 150 150 150 150	45 52 51 44 54 58	15  0 30 45 45 45	+11 11 — — — — —	150 151 151 150 151 151	56  3  2 55  5  9	26 11 41 56 56 56	− 9 30 — — — — —	One day. — — — — —	150 150 150 150 150 151	46 53 53 46 56  0	56 41 11 26 26 26	☉ E. ☾ — — — — —	F — — — — —
21 at  9 45	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	Entrance I. in Port Bowen. — — —	151 151 151 151 151 151	8  8  3  1 10 10	45 30 45 30 15 15	+13 20 — — — — —	151 151 151 151 151 151	22 21 17 14 23 23	5 50  5 50 35 35	−10 45 — — — — —	Two days. — — — — —	151 151 151 151 151 151	11 11  6  4 12 12	20  5 20  5 50 50	Ditto. — — — — —	F — — — — —
	Mean of 24 sets, uncorrected						151	9	42,7	Corrected		151	0	27,7

 

Longitude of the anchorage by the two time keepers, from the uncorrected Port-Jackson rates, was . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	150°	57′	43″ east.
But from the observations at Upper Head (in the following table), reduced by the survey to the anchorage, the longitude preferred to both the above is . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	150	58	20 east.