V.
Val d'Hérens, earth pillars of, 33.
Van Tillo, nature of continental rock covering, 9.
Vegetable and animal systems, relative absorption of energy of,
78.
Vegetative organs, struggle between, 105, 106.
Volcanoes and mountain ranges, 118; associated with geosynclines,
142; Oligocene and Miocene of Europe, 147.
W.
Weinschenk and thermal metamorphism, 132,
149.
Weismaun, encystment of protoplasm, 68; length of life and
somatic cells, 96; origin of death, 83; tendency to early
reproductiveness, 98.