. Report on the proceedings of the United States expedition to Lady Franklin Bay, Grinnell Land [microform] . Tides; Meteorology; Meteorology; Zoology; Botany; Magnetism, Terrestrial; Astronomy; Astronomy; Gravity; Marées; Météorologie; ; ; ; ; ; ; . ! ; I ⢠I !â¢. it! ^;J 686 TUE LADY FliANKLlN BAY EXPEDITION. This characteristic of the diurnal inequality wave is not noticed in the reduction of the seven-month series at Polaris Hay,* luit fortunately the method of Pourtales liaving been employeil and two examples given in the plates, we have to hand the data from which to establish its
. Report on the proceedings of the United States expedition to Lady Franklin Bay, Grinnell Land [microform] . Tides; Meteorology; Meteorology; Zoology; Botany; Magnetism, Terrestrial; Astronomy; Astronomy; Gravity; Marées; Météorologie; ; ; ; ; ; ; . ! ; I ⢠I !â¢. it! ^;J 686 TUE LADY FliANKLlN BAY EXPEDITION. This characteristic of the diurnal inequality wave is not noticed in the reduction of the seven-month series at Polaris Hay,* luit fortunately the method of Pourtales liaving been employeil and two examples given in the plates, we have to hand the data from which to establish its existence. From 8 readings of high and 8 of low water between January i and 8, 1872, i^ of high and 15 of low between May 22 and June 6, following, it appears that the high water of the diurnal inecjuality wave arrived at I'olaris Day January 4 at '' and on May 29 at '' sidereal time. The probability that the period of tiiis wave differs materially from a sidereal day is very slight. i'he inference from these facts is that from Smith Sound to Robeson Channel the mean periotl of the diurnal inequality wave is practically, if not i)recisely, a sidereal The range of the diurnal inequality wave at Fort Conger is small, the mean of 370 high waters rising 3 34 inches above and the mean of 369 low waters falling ^.;^\ inches below llu; surface of the semi-diurnal wave. The mean range of the semi- diurnal tide may be taken as approximately 49 inches. Hence the ranges of the two components are to each other as to 49, or as I to jyi nearly. At Fort Foulke these ranges were to each other nearly as 1 to 2"/j. The disparity of these ratios is worthy of attention. To tletermine the respective influences of the moon and sun in raising the diurnal inequality wave Tables XVlll ami XIX were formed from Table XVII acconling to a principle that readily appears from inspection of the tables themselves. To allow for retard the declinations antedate Iv; .1 day th
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