Lightning, 85, 86; trees struck by, 175, 176, 278. Linden, seeds, 300. Lion, mountain, attacking beaver, 28, 29, 35, 36; adventure, 102; fleeing from a forest fire, 143. Little Cimarron River, 228, 234, 240-242. Locke Vale, 347. Locust, honey, seeds and pods, 299, 300. Log, with a cargo of seeds, 292-294. Long's Peak, 310, 338; wind on, 75-78; area of summit, 78; altitude, 85; thunder-storms on, 85; forest fires seen from, 140; Mills Moraine, 263, 342; glaciers, 341; boulder field, 342; geological history, 342, 343. McHenry Peak, 341. Magpie, 149, 347. Mangrove, seeding, 302. Maple, red, seeds, 296. Maple, silver, seeds, 295. Middle Park, 339, 344. Mills Moraine, 263, 342, 343. Mississippi River, origin of its mud, 285; a seed-laden log on, 292-294. Missouri River, its channel full of dissolved Rocky Mountains, 284. Mt. Barrat, 341. Mt. Coxcomb, crumbling character of, 228-230; a night climb in the rain, 228-240. Mt. Hallett, 341. Mt. Meeker, 207, 342. Mt. Teller, 88. Muir, John, quoted, 128, 250, 327. Night, mountain-climbing by, 226-232. Nuthatch, 199, 200. Nuts, 293-295. Orton, Edward, Jr., quoted, 263. Otis Peak, 341. Ouzel. _See_ Water-ouzel. Parks, mountain, openness caused by forest fires, 339. Persimmons, 299. Pine, lodge-pole, 153, 157, 160; spectacular death of, 158, 159; destroyed by beetles, 178; seeding, 298. Pine, Western yellow, as a fire-fighter, 160, 161; killed by beetles, 174-176. Poisoning, from a spring, 109-111. Poudre River, 95. Ptarmigan, 347. Rabbit-Ear Range, 140. Rain, effects on forested and deforested slopes, 267-287. Ridgway, 226, 233, 243. Robin, 270. Rock avalanche, 113-115. St. Vrain River, a rainy day at the source, 267-287; the two branches, 271. San Juan Mountains, snowslides in, 3-15. San Luis Valley, 117. Sangre de Cristo Mountains, 101, 109. Scotch, the collie, and the bear cub Johnny, 213; in a mountain blizzard, 309-320. Seeds of trees, many devices for sowing, 291; log cargo of, 292-294; nuts, 293-295; winged, 295-298; pulp-covered, 298, 299; other wind-carried seeds, 299, 300; hooked, 301; carried by animals, 301; catapulted, 301; water-carried, 302; prodigality of nature in regard to, 302-305. Sheep, mountain, _or_ bighorn, in a whirlwind, 72, 73; in a forest fire, 143. Sierra Blanca, 110; climbing, 112-117. Snow slides, studying, 3; an adventure with a slide, 4-15. Snow-storm, climbing above a, 81-83; a mountain blizzard, 311-316. Solitaire, 287, 347. Specimen Mountain, 347. Spring, a poisonous, 109. Spruce, Engelmann, 153, 155, 273.