Page:A Voyage to Terra Australis Volume 2.djvu/25

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Port Curtis.]
TERRA AUSTRALIS.
21

1802.
August.

The latitude of our anchorage at the northern entrance, from four meridian altitudes of the sun, is
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 23° 44′ 16″ south.
Six sets of distances of the sun west of the moon, taken by lieutenant Flinders, would make the longitude 151° 21′ 22″ east; the two time keepers gave 151° 20′ 10″; and fifty sets of distances, reduced from Broad Sound by the survey, which I consider to be the best authority, place the anchorage in
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151 20 15 east

These being reduced by the survey to the southern entrance, place

Gatcombe Head in latitude 23° 52½′ S.
longitude 151 24 E.
No variations were observed at the anchorage; but two amplitudes off Gatcombe Head gave 11° 11', and azimuths with three compasses, 10° 50′ east, the ship's head being W.S.W. and W.N.W. These being reduced to the meridian, will give the true variation to be
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8° 40′ east.

This is an increase of near 2° from Bustard Bay; and seems attributable to the attraction of the granitic land which lay to the westward, and drew the south end of the needle that way.

The rise of tide at the place where I slept near the head of the port, was no more than four feet; but upon the rocky islet in the northern entrance, there were marks of its having risen the double of that quantity. The time of high water was not well ascertained, but it will be between eight and nine hours after the moon's passage over and under the meridian.

Monday 9.On getting under way at daylight of the 9th, to prosecute the examination of the coast, the anchor came up with an arm broken off, in consequence of a flaw extending two-thirds through the iron.