[Footnote 82: For the cause of earthquakes, see Buffon,
(tom. i. p. 502 - 536 Supplement a l'Hist. Naturelle, tom.
v. p. 382-390, edition in 4to., Valmont de Bomare,
(Dictionnaire d'Histoire Naturelle, Tremblemen de Terre,
Pyrites,) Watson, (Chemical Essays, tom. i. p. 181 - 209.)]