Page:A Voyage to Terra Australis Volume 1.djvu/489

 

TABLE II. (Reference from p. 84.)

Longitude of the south point of Lucky Bay, Archipelago of the Recherche.

Appt. Greenwich time of the observations.		Place.	Longit. E. from Naut. Alm.			Reduction by two time keepers.			E. Longitude of Lucky Bay.			Correction			Correct Longit. of Lucky Bay.			Whence deduced.	Observer.
												for errors in tables		Interv. of ☾'s error.
			°	′	″				°	′	″	'	″		°	′	″
1802 Jan. ʰ    ′ 9 at 17 56	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	On the South Pt. — — — —	122 122 122 122 122 122	30 29 33 34 38 41	45 30 15 45 45 15				122 122 122 122 122 122	30 29 33 34 38 41	45 30 15 45 45 15	−6 — — — — —	15	One day — — — — —	122 122 122 122 122 122	24 28 27 28 32 35	30 15  0 30 30  0	ʘ W. ☾ — — — — —	C — — — — —
27 at 13 28	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	At sea. — — — — —	132 131 131 131 131 131	0 51 51 47 50 52	45 15  0  0 15 45	° − 9	' 30 — — — — —	" 55	122 122 122 122 122 122	29 20 20 16 19 21	50 20  5  5 20 50	−8 — — — — —	45	As on 27th there being no other obs. until Feb 5. —	122 122 122 122 122 122	21 11 11  7 10 13	5 35 20 20 35  5	ʘ E. ☾ — — — — —	C — — — — —
28 at 14 42	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \ \end{matrix}}\right.}$	On shore at Fowler's Bay. —	132 132 132 132	30 24 19 19	45 30 30 15	−10	13 — — —	38	122 122 122 122	17 10  5  5	7 52 52 37	−8 — — —	30	Ditto. — — —	122 122 121 121	8  2 57 57	37 22 22  7	Ditto. — — —	F — — —
Longitude from sixteen sets of lunar distances,			$\scriptstyle {\left.{\begin{matrix}\ \\\ \end{matrix}}\right\}\,}$	Uncorrected		122	23	27,1	Corrected						122	15	42,1

 

Longitude of the south point from the two time keepers.
On Jan. 9 at 15ʰ 51′ of Greenwich time, and using the King-George's-Sound rates, the mean longitude was	122°	15″	48″
Correction for variation in the rates found at Pt Lincoln,		−0	24,1
Correction for supplemental error during 9 days,		−1	10,2
Corrected longitude, taken preferably to that above,	122	14	13,7	east