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, 

 r 58, 159 5 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. 

 Smell, sense of, 7. 

 Snake River, 25. 

 Soil, the beaver's conservation of, 214, 



217-220. 

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



'33, '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, u ; 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; trails and 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, *9%> a 3 



227 



