Note 62 — Chapter VII
Reading edition
It is a singular fact that true trachyte, pumice, and obsidian are wanting in the volcanic Galápagos Islands, only 700 miles west of Pichincha.
Reading edition
It is a singular fact that true trachyte, pumice, and obsidian are wanting in the volcanic Galápagos Islands, only 700 miles west of Pichincha.