Tomboro, eruption at, 260. "Tors," 292. Tourmente, the, 83. Transportation by rivers, 161, 166-169. by glaciers, 224. Triassic Period, 324. Types of plants and animals at different periods, 106. Upheaval theory of mountains, 247. Uses of mountains, 33. "Valleys, how carved out, 214-230. Vesuvius, history of, 250. Vines, the region of, in Alps, 109. Volcanoes, number of active, 242. old ideas about, 244. structure of, described, 244. volcanic rocks of Great Britain, 271. Vulture, the bearded, 134. Wall of Antoninus, 185. Waterfalls, origin of, 218. Water-vapour, in air, 34. condensation of, by mountains, 34. Waves of population, 30. Weald, the denudation of, 235-239. structure of, 303. Werner, 158. Wild-cat, in Alps, 128. Wolf, the, in Alps, 126. Zones of climate on the earth, 63. Transcriber's note: A "List of Illustrations II" has been added to the text, for the convenience of the reader, to display Illustrations that were not included in the original "Illustrations" section. The original spelling of words, especially for place names, has been retained. End of Project Gutenberg's The Story of the Hills, by H. N. Hutchinson