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, snow- 

 slides in, 3-15. 



San Luis Valley, 117. 



Sangre de Cristo Mountains, 101, 

 109. 



Scotch, the collie, and the bear 

 cub Johnny, 213; in a moun- 

 tain 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; car- 

 ried by animals, 301; cata- 

 pulted, 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, no; 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- 



Squirrel, Fremont, an interview, 

 276, 277; character and man- 

 ners, 323, 324; food and har- 

 vesting, 324-329, 333; hiber- 

 nation, 329, 330; homes, 330; 

 young, 330; longevity, 330, 

 333; story of a pair, 330-334. 



Sycamore, seeds, 297. 



Taylor Peak, 341. 

 Thatch-Top, 341. 

 Thompson Canon, 344, 345. 

 Thrush, Audubon's hermit, 287, 



347- 



Trees, relations to mankind, 123, 

 J 34 J 35; as sanitary agents, 

 133; medicines and foods pro- 

 duced by, 133, 134; uprooted 

 and transported by a land- 

 slide, 236-239; up a tree in a 

 storm, 276-278; seeds and 

 seeding, 291-305. See also 

 Forests. 



Turret-Top, 243. 



Uncompahgre Mountains, trip 



through, 223-243. 

 Uncompahgre Peak, 224. 



Wasps, feeding on grubs, 179; 



and bear, 180. 

 Water-ouzel, 269-271, 347. 

 Weather, of alpine zone of 



Rocky Mountains, 71-89. 



355 



