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94
GEOGRAPHICAL POSITION.
[Chap. IV.
1840
varies from four to twelve inches, and the diurnal inequality is, comparatively, very considerable. The height of the tide was registered every quarter of an hour between the 3d of June and 4th of July; and the time of high water at full and change of the moon was exactly at two o'clock.
Our observations gave the latitude of the observatory 48° 41′ S., and its longitude 6S° 3′ 35" E. The mean dip of the magnetic needle 69° 59′ 4″ S., and the variation 30° 33′ 35″ E.
The term-day observations for the month of June being completed, and the absolute determinations obtained, the instruments and houses were embarked, and the ships got ready for sea by the middle of July, but adverse weather detained us still a few days longer, and we were not able to leave this most dreary and disagreeable harbour until the 20th July.