Vegetation, its varied distribution on the earth's surface, 29-31, 62; richness and fertility in the tropics, 33-35; zones of vegetation on the declivities of mountains, 29-32, 346-350. See Aetna, Cordilleras, Himalayas, Mountains.
Vico, satellites of Saturn, 96.
Vigne, measurement of Ladak, 322.
Vine, thermal scale of its cultivation, 324.
Volcanoes, 28, 30, 35, 159, 161, 214, 215, 224-248; author's application of the term volcanic, 45; active volcanoes, safety-valves for their immediate neighborhood, 214; volcanic eruptions, 161, 210-270; mud volcanoes or salses, 224-228; traces of volcanic action on the surface of the earth and moon, 228; influence of relations of height on the occurrence of eruptions, 228-233; volcanic storm, 233; volcanic ashes, 233; classification of volcanoes into central and linear, 238; theory of the necessity of their proximity to the sea, 243-246; geographical distribution of still active volcanoes, 245-247; metamorphic action on rocks, 247-249.
Vrolik, his anatomical investigations on the form of the pelvis, 352, 353.
Wagner, Rudolph, notes on the races of Africa, 352.
Walter on the decrease of volcanic activity, 215.
Wartmann, meteors, 113, 114.
Weber, his anatomical investigations on the form of the pelvis, 353.