Note 45 — Chapter III · ASCENSION.
Reading edition
See Phillips’ “Mineralogy,” for the Italian Islands, p. 136. For Mexico and Peru, see Humboldt’s “Essai Géognostique.” Mr. Edwards also describes the high inclination of the obsidian rocks of the Cerro del Navaja in Mexico in the Proc. of the Geolog. Soc. June 1838.