490 



Index 



to a lava flow, 131, 133*. No previous flow, 

 134, 135. Source, 138*. 139, 140, 140*. 141. 

 Area, 120. Compared to pond ice, 108*, 122*, 

 123. Effect on vegetation of, 204, 205, 205*. 

 Unique in volcanic history, 142. 



Mud-hissers, 260. 



Mud volcanoes, 260, 275, 276, 277, 277*. 



N 



New Zealand pumice area, 14, 15. 



Bush sickness, 14. Contrast with Katmai dis- 

 trict, 15. Re vegetation, 14. 

 Nitrite content of tundra, 222, 223, 222*. 

 Nitrites in creek water, Kashvik Bay, 231. 

 Nitrification unaffected by season, 223. 

 Nitrogen content of ash from various locations, 



217, 218. 



Nitrogen content of Katmai ash, 216, 216*. 217. 

 Nitrogen content of river deposited ash, 219, 219*, 



220. 



Nitrogen plant food problem, 342. 

 Nitrogen supply, controlling factor in revegeta- 



tion, 213, 214. 

 Nitrous nitrogen content of ash unaltered by 



lupines, 221. 



Nitrous nitrogen in rainfall of Alaska, 231, 232. 

 Nitrous nitrogen in rainfall of Valley, 233. 

 Nodules on lupine roots, 220. 

 Novarupta, 111-116, 112*. 113*, 114*. 



Character of ejecta, 115. Plug, 114. 

 Nymphsea polysepala, 41. 



O 



Oases of plants preserved, 213. 

 Organisms in snow, 234. 

 Oxyria dignyia, 189. 



Paper bags, contamination by ammonia, 215. 



Passerella illiaca unalaskensis, 485. 



Passerculus sandwichensis alaudinus, 484. 



Pelidna alpina pacifica, 481. 



Penthestes atricapillus turneri. 486. 



Phalacracorax pelagicus, 476*, 479. 



Phalaropus lobatus, 480. 



Phalarope, Northern, 480. 



Philonatus tenella, 12. 



Photographs of use in locating stations, 22*, 23* 



26*. 27*. 29, 29*, 30, 30*. 

 Pica pica hudsor.ia, 483. 

 Picea sitchensis, 49. 



Pillar Mountain ash drift, 218, 227, 228, 228*. 

 "Pimples," 261. 

 Pipit, 486. 



Pissorbia minutilla, 481. 

 Pittosporum, 13. 

 Plants in sheltered places, 329. 



Killed in. bogs, 42, Resurrected, 32. 



Plover, Pacific Golden, 482. 



Plowed and fallow ground revegetation, 31-33*. 



Poasp., 196. 



Pogonatum tenue, 12. 



Poisonous gas blast, 181. 



Polemonium acutiflorum, 196, 329. 



Polentilla villosa, 189. 



Polygonum aviculare, 51*. 



Polytrichum, 189. 



Ponds ash filled, 39, 40*. 41. 



Pond plants survived, 40*. 41, 43. 



Zones of returning vegetation, 41, 42. 

 Poplar and willow compared as to survival, 201. 

 Populus candicans, 49. 

 Precipitation table for Kodiak, 18. 

 Prehistoric eruption of Alaska, 15, 16. 



Area, 15. Depth of deposits, 15. Similarity to 



Katmai, 15, 16. Ash overlaid with peat, 16. 

 Problems of the future, 54. 



Raised by volcanic nature of Valley, 116. 

 Ptarmigan, Nelson's 482. 



Willow, 482, 482*. 

 Puccinellia Alaskse, 52*. 53, 53*. 

 Puffin, Horned, 477, 480*. 

 Pumice area of New Zealand, 14, 15. 



Quicksands in swamps, 39, 40*, 41. 



R 



Rainfall observations at Kashvik Bay, 230. 



Rainfall of Kodiak, Table II, 19. 



Rainfall through fumarole gases, 233. 



Raoulia, 13. 



Raven, 475. 



Recovery differences, reasons for, 193. 



Redpoll, 483. 



Removal of ash, 54, 55, 56. 



Resurrection of vegetation, 32-35. . 

 At Kodiak, 32. On mainland, 33. Dormancy 

 period, 33, 34, 35. 



Resurrected vegetation furnishes seed, 323. 



Revegetation 



Agents, Katmai Valley, 320. Aided by running 

 water, 51. Effect of cultivation, 31. From 

 old plants. 31. Influence of herbaceous plants, 

 322. In forest, 4*. 45, 46*. 47, 47*, 48*, 49. In 

 wet places, 331, 332. Of mountain summits, 

 56, 57. Of plowed ground, 31, 32*. 33*. Of salt 

 marshes, 52, 52*, 53, 53*. 5-1. Recovery of old 

 plants, 31. Retarded by shifting streams, 

 340. Root system, 31. 



Revegetation comparisons, 8-15. 

 Krakatoa, 8, 9, 10. Taal, 10, 11. Soufriere of 

 St. Vincent, 11, 12, 13. Tarawera, 13, 14. 

 New Zealand pumice area, 14, 15. Prehistoric 

 eruption of Alaska, 15, 16. 



Revival of plants after burial, 194*. 195. 



Rhodiola rosea, 189, 196. 



