Forest fires, watching, 139-170; varying speed of, 141, 142, 167; wild animals in, 142-145; rarely make a clean sweep, 145, 146; dead trees burning after, 146, 147; extent, 147; destroy humus, 148, 149; loss of animal life in, 149; storm of ashes after a fire, 150, 151; upbuilding after, 152; origins of, 152, 153, 155, 156, 162, 163, 176; methods of fighting, 152, 153, 163-165; trees standing after, 154, 158; geysers of flame, 158, 159, 169; duration of, 161, 162; protection against, 163-165; erosion after, 165, 166; explosions of rock caused by, 169, 170; interrelation with destructive insects, 173, 174, 186; wood preserved by, 187. Forests, as wood-producers, 124; as water-distributors, 124, 125; other uses, 125; as moderators of climate, 125, 126; as windbreaks, 126; delaying evaporation, 126-129; necessary to agriculture, 127, 128; as reservoirs, 128-130; as regulators of stream-flow, 130; as makers of soil, 131, 132; as bird-shelters, 132, 133; as sanitary agents, 133; evils following destruction of, 134; preëminent in promoting the general welfare, 134, 135; insect enemies of, 173-189; observations of a forested and a deforested region during a rain, 267-287; the forest floor, 273, 274. Fort Garland, 112, 113, 118, 119. Fungi, enemies of trees, 183, 184. Fungus, false-tinder, 184. Glacier Gorge, 341, 347. Glaciers, work of, 247-250; Muir and Henderson on, 250; rate of movement, 251; Arapahoe, 251, 255, 260, 261; grinding and excavating powers, 251-253; moraines, 253-255; lakes made by, 253, 343; strange freight, 255, 256; mineral wealth, 256; making soil, 257; formation, 258, 259; in the Rocky Mountains, 258, 260-263, 338, 341-343; bergschlunds and crevasses, 260, 261; pleasures of investigation, 263. Grand Lake, 348. Grand River, 309; forest fires on, 140-153. Granite Pass, wind in, 75-77. Greenwood, Grace, 337. Ground-hog, 282. Grouse, fleeing from a forest fire, 144. Hallett Glacier, 343. Hallett Peak, 341. Henderson, Junius, quoted, 250. Horne's Peak, 102. Ice, climbing with a dog over, 310, 314, 317-320. Insects, in the forest, 173-189; interrelation with forest-fires, 173, 174, 186; beetles, 174-181; weevils, 182; borers, 182; serial attacks, 182, 183; interrelation with parasitic plants, 183, 184; seriousness of their ravages, 185, 186, 189; control of depredations, 187-189; woodpeckers the enemies of, 193-204. Ironwood, seeds, 300. Jay, crested, 149. Jay, Rocky Mountain, _or_ gray jay, _or_ camp-bird, 149, 180, 223. Lake City, 223. Landslides, a night and a day of, 232-239; on a deforested slope, 281, 282; a liquefied landslide, 283, 284. _See_ Rock avalanche. Leadville, 98-100.