Note 84 — Chapter IX
Reading edition
MM. Zurcher and Margalli make the slope 55°! and Guzman, 69° 30'!! The slope of Mauna Loa is 6° 30'; of Etna, 9°; of Teneriffe, 12° 30'; of Vesuvius, 35°. While cinder-cones may have an angle of 40°, lava-cones seldom exceed 10°.