Page:A Voyage of Discovery and Research in the Southern and Antarctic Regions Vol 2.djvu/142

1841

high water after new moon, and the amount of tide six feet ten inches.

October 1st.—Full moon at 3^h 55^m a.m., high water at 7^h 22^m a.m., amount of tide five feet two inches; the highest and largest tide being the seventh high water after full moon, and amounted to six feet one inch; the strength of the stream of the flood at the anchorage 0.6 mile per hour, and of the ebb 1.2 mile per hour.

October 15th.—New moon 4^h 2^m a.m., high water 7^h 15^m a.m., amount of tide five feet seven and a half inches; largest tide the seventh high water after new moon, being six feet one inch; strength of the flood 1.0, and of the ebb 1.4 mile per hour.

October 30th.—Full moon 5^h 33^m p.m., high water at 7^h 30^m, rise of tide five feet six inches, largest tide the sixth after the change of moon, amounted to six feet two inches, stream of flood 1.0 and of the ebb 1.2 mile per hour.

For practical purposes we may therefore assume that the time of high water next after the full and change of the moon takes place at about 7^h 22^m; that the amount of tide on that day is about five feet six inches; and that the highest tide occurs very irregularly, but may be looked for generally about the fifth or sixth high water after the full or change of the moon, at which time it varies in amount from five feet ten inches to six feet ten inches; and that at the strength of the flood-tide in the middle of the stream, its rate is rather less than one mile, and