Note 3 — THE YEAR OF REVOLUTIONS.
Reading edition
"Thirty-five miles below the surface of the earth, the central heat is everywhere so great, that granite itself is held in fusion."—Humboldt, Cosmos, i. 273.
Reading edition
"Thirty-five miles below the surface of the earth, the central heat is everywhere so great, that granite itself is held in fusion."—Humboldt, Cosmos, i. 273.