[148]. These values represent the number of degrees that the magnetic needle is repelled. The method is described above. A note on the average amount of polarity found in all my polaric rocks is given at the end of the chapter. The term “dacite” is here an equivalent of “felsitic andesite.”
[149]. This name has been wrongly applied in the Admiralty chart to the mountain of Mbatini. Koro-mbasanga, 2,500 feet, lies three miles to the north.
[150]. This rock is described on p. [109]. There is no exceptional development of magnetite for a basic rock in the groundmass.
[151]. Unfortunately, I have no data for the peaks of Na Raro and Vatu Kaisia, except that specimens obtained below the summits are non-polaric. In the case of Na Raro I did not retain the specimen obtained at the top; whilst in my ascent of Vatu Kaisia I did not quite reach the summit.
[152]. The mode of measurement is described on p. [366].
[153]. See pp. [2], [15], [18], [56], [62], [72], &c.
[154]. The Islands and Coral Reefs of Fiji, Bull. Mus. Comp. Zool. Harv. Coll. vol. 33, 1899.
[155]. Scott. Geogr. Mag. 1895.
[156]. Ancient Volcanoes of Great Britain, by Sir A. Geikie, 1897, ii. 260.
[157]. See Wichmann in Min. und Petrog. Mitth. band v. heft 1.