[70] All the times in this section are referred to Madras mean time, which is 5h. 20m. 59.2s. in advance of Greenwich mean time. In the next section it will be found convenient to use the latter standard.
[71] It may be useful to give references to works in English in which the principal instruments for registering distant earthquakes are described. For Cancani's vertical pendulum, see Brit. Assoc. Rep., 1896, pp. 46-47; Darwin's bifilar pendulum, Brit. Assoc. Rep., 1893, pp. 291-303, and Nature, vol. 1., 1894, pp. 246-249; Milne's horizontal pendulum, Seismology, pp. 58-61; Rebeur-Paschwitz's horizontal pendulum, Brit. Assoc. Rep., 1893, pp. 303-308.
[72] The beginnings of the second and third phases are shown more clearly in the record of the vertical pendulum at Catania, a record, however, that will not bear the reduction necessary for these pages.
[73] Geol. Mag., vol. x., 1893, pp. 356-360.
[74] Irish Acad. Trans., vol. xxi, 1848, p. 52.
[75] Irish Acad. Trans., vol. xxi., 1848, pp. 55-57.
[76] Neapolitan Earthquake of 1857, vol. i., 1862, pp. 376-378.
[77] Japan Seismol. Soc. Trans., vol. i., pt. II., 1880, pp. 33-35.
[78] Geol. Mag., vol. ix., 1882, pp. 257-265.