Majors, Alexander, his Seventy Years 

 on the Frontier, 59, 60. 



Martin, Horace T., 49. 



Mating, 27. 



Medicine Bow Mountains, 197. 



Migration, 20, 21, 132, 133, 141, 161- 

 163, 167-169, 175-177, 182, 183. 



Mischief, 30, 31. 



Moraine Colony, engineering of, 139, 

 142-150; discovery and observation, 

 of, 153-158 ; homes destroyed by fire, 

 158, 159 ; migrating, 161-163 > new 

 site, 163, 164 ; old site resettled, 165 ; 

 later fortunes, 166-171. 



Morgan, Lewis H., his American Bea- 

 ver and his Works, 54, 55, 58. 



Night, working at, 33. 

 Northwestern Fur Company, 49. 



Old, the, 34. 

 Outcasts, 34. 

 Ouzel, water, 199. 



Parasites, 14. 



Physical make-up, 5-9, 68. 



Pipestone Creek, n. 



Place-names taken from the beaver, 42, 



43- 



Play, 29, 156, 157. 



Ponds, early abundance, 42; size, 65, 

 86 ; uses, 68, 69 ; chains or clusters 

 of, 74 ; depth, 107 ; canals in bottom, 

 107 ; spring-filled, 113, 114 ; lowering 

 the level under ice, 202, 203 ; drain- 

 ing, 208, 209 ; effect on stream-flow, 

 213-217 ; leaky reservoirs, 216. 



Population, changes in, 46, 47. 



Protection, 50, 217, 220, 221- 



Reason, evidences of, 57, 58. 

 Romanes, George J., on the beaver, 58, 

 59- 



Sanitation, 208. 



Sawtooth Mountains, 66. 



Sediment/a problem of beaver life, 125, 



126. 



Sheep, mountain, 192. 

 Size, 7. 



Skins, 43, 44, 48, 49. 

 Sleep, 122. 

 Slides, 87, 112, 199. 

 4>mell, sense of, 7. 

 Snake River, 25. 

 Soil, the beaver's conservation of, 214, 



217-220. 

 Sounds and silence, 19, 20, 23, 26, 27, 



i33 '34- 



Springs, use of, 204. 

 Spruce Tree Colony, harvest time with, 



83-98 ; tunnels in, 113-115. 

 Stream-flow, effect of beaver on, 72- 



74, 213-217. 

 Strength, 9. 



Subways. See Tunnels. 

 Swimming, method of, 6. 



Tail, uses of, 5, 6, n ; form and cover- 

 ing, 8; signalling with, 24, 31, 96; 

 fabulous accounts of the uses of, 



53- 



Teeth, 7-9. 



Three Forks, Montana, 42, 79 ; canal 

 system at, 107-111. 



Trails, in, 112. 



Transportation of dam and food ma- 

 terial, 86-90, 92, 93 ; canals used in, 

 106-115; tra '' s anc * slides used in, 

 in, 112, 115 ; tunnels used in, 112- 

 115. 



Trappers, 164, 189-191. 



Traps, 35, 189. 



Trees, cutting. See Cutting trees. 



Trimming trees, 12, 96. 



Trout, 205, 206. 



Tunnels, 85, 112-115, '98, 203, 206. 



227 



