INDEX 



A star (*) after a page number indicates lhat an illustration of the subject appears 

 in connection with the reference. 



Acorns, 93, 94*, 95*, 287, 336, 345, 363, 



364. 

 Age, of branches, 71-72; cardinal, 333 ; 



trees, 20, 39, 118. 

 Aigrettes, 382*, 389. 

 Airplanes, spruce, 124. 

 Alcohol, wood, 127. 

 Alcyone, 203. 

 Aldebaran, 177, 204. 

 Alfalfa weevils, 340, 383. 

 Algol, a variable star, 198-199. 

 Alpha Centauri, 171. 

 Altair, 208, 209. 

 Alternate, 30, 38*, 66, 74*. 

 Altitude, 172. 

 Andromeda, constellation, 194, 198; 



nebula in, 263*. 

 Andromedes, 259. 

 Annual rings, 14*, 20, 22*, 44*, 72, 99, 



100, 101, 102, 103*. 

 Anseres, 283. 

 Ants, 365. 



Apple family, 55, 56. 

 Apple worms, 363. 

 Aquila, the Eagle, 208. 

 Arbor vitae, 113*, H4*-ii5; wood, 47, 



109*. 



Arcturus, 200. 

 Army worms, 337, 340. . 

 Arrangement of leaves and branches, 



30, 65-67, 72. 

 Ash, si*-55; bark, 51, 52; branchlets, 



36,51,52; kinds, 52-53; leaves, 36, 



51*, 52; wood, 43, 54*, 99, 100*, 



149*. 



Ashes as fertilizer, 138. 

 Aspen, 33, 74*, 76. 

 Assyrians, knowledge of astronomy, 



161162. 

 Astronomy, 159, 161, 162, 166; books 



of, 264. 

 Atmosphere, of the earth, 212; moon, 



225, 226. 



Attracting birds, 390*^92 . 

 Audubon Societies, 270, 389, 390. 

 Auriga, the Charioteer, 199. 

 Axis, 174. 



Backboned animals, 282, 283. 



Bags, linden, 60. 



Balsam, from fir, 125. 



Bark, 6, 17*, 19, 36, 62, 94, 143. 



Bark beetles, 303. 



Barrels, elm, 39 ; of quartered staves, 

 104. 



Baskets, birch bark, 34 ; elm, 39. 



Basswood, 44, 58, 153*, 155. See 

 Linden. 



Bast, 20, 59*. 



Bats, ash, 54. 



Bear, Great, 190; Lesser, 192. 



Beavers cutting down trees, 76. 



Bee bird, 350. 



Beech, 98; nuts, 336, 363; wood, 46, 

 154- 



Bee martin, 350. 



Bees, 350, 351. 



Bee trees, 39, 57. 



Bellatrix, 204. 



Beta Persei, 198. 



Betelgeuse, 204. 



Biela's comet, 259. 



Big tree, 116*, 118-120. 



Biological Survey, 304. 



Birch, 33*-36, 366 ; bark, 34 ; branch- 

 lets, 36, 72; flowers, 71; oil, 34; 

 sugar, 23; tar, 34; wood, 35, 44, 

 45*, 154*, 155. 



Bird, bath, 298*, 391*; beak, 286, 291, 

 320, 328*, 362*, 368, 371, 386; 

 books, 270, 396; bulletins, 270; 

 classification, 279-283, 307; com- 

 munication, 364; crest, 286, 312, 

 332, 345; familiarity, 277, 285*, 

 286*, 324, 333, 355, 386; families, 

 279, 282; feeding in winter, 285, 

 288-290*; feeding places, 285*- 

 290*, 391; feet, 280*, 362*; food 

 of young, 267^269*, 317, 320, 355, 

 365; glasses, 269, 395; houses, 272*, 

 274*, 317*, 365*, 390, 392*, 3935 

 introduced in new land, 321, 348, 

 380; migration, 304-307, 389 ; nest- 

 ing boxes, 393 ; observation, 268- 

 270; of prey, 37i~377; pets, 345, 

 347; relationship, 370-381; re- 

 serves, 390; roosts, 335, 346; senses, 

 311, 371; shelters, 289; speed of 

 flight, 306, 358; speed of migration, 

 305 ; trees and shrubs for them, 

 391-392; tongue, 362*; trap, 298, 

 394; whistle, 286, 294, 332, 340, 

 343, 379- 



Bird's-eye maple, 27. 



Bitternut, 89. 



Blackbird, 335-339, PI. X. 



397 



