INDEX 



Crabs, 252. 



Crayfish, 251, 442, 473. 



Crickets, 232. 



Cross pollination, 225, 324, 326, 329. 



Croton-bug, 215. 



Crow, 119, 120, 124. 



Crystals, 427. 



Cuckoo, 221. 



Culex, 213. 



Cultivation of farms, 482. 



Cultural value of nature-study, 15. 



Culture-epoch theory, 10. 



Cutworm, 216, 294. 



Daddy-long-legs, 250. 



Dairy, 493. 



Dandelion, 336, 341. 



Deciduous trees, 363. 



Deduction, n. 



Deer, 407, 419, 462. 



Destruction of birds, 132. 



Development method, 24, 33. 



Diagrams, 37, 59. 



Diatoms, 338. 



Digestion, 439, 456. 



Dip-net, 177. 



Disease, from flies, 205; from mos- 

 quitoes, 213. (See Bacteria.) 



Distribution, of animals, 472, 501; 

 of plants, 476, 506. 



Dog, 414. 



Dogday harvest-fly, 234. 



Dog-fish, 171, 174. 



Doves, 145. 



Dragon-fly, 189, 429. 



Drawing, 37, 59. 



Drinking trough, 144. 



Duck, 102, 103, 115, 117, 120, 122, 

 123, 415, 440. 



Eagle, 415. 



Earth study, 55, Chap. XX., 499. 



Earthworm, 255, 409. 



Economic value of birds, 122; toad, 



159; insects, 211, 230. 

 Eel, 173, 174. 

 Eel-grass, 167. 

 Eft, 1 60. 



Eggs, 94, 122, 133, 134. 

 Egret, 137. 



Eiderduck, 112. 



Electricity, 500. 



Electric-light bug, 192. 



Elementary science, 483. 



Elodea, 167. 



Emu, 103. 



Equisetum, 390. 



Evaporation, 412, 427. 



Evergreens, 420, 433. 



Exhibits (garden), 430, 443, 448, 459. 



Experiments, 39. 



Explosive fruit, 352. 



Extinct animals, 502. 



Fairy tales and nature-study, 65. 

 Feathers, 101, 478; millinery, 123, 



136, 137- 



Feeding farm animals, 483. 



Fernery, 282, 389. 



Ferns, 388, 475, 503. 



Fertilizing soil, 266, 283. 



Fibrovascular bundles, 305. 



Field lessons, 35, 48, 51. 



Field mice, 128. 



Fish, 169, 419, 479; care, 167; 

 economics, 172; freshwater, 173, 

 479; hatchery, 173; spawning, 

 172; structure, 170. 



Fisheries, 173. 



Flax, 420, 433. 



Flea, 214. 



Fleshy roots, 304. 



Flight, 102. 



Flowerless plants, 388, 503. 



Flower list, 295. 



Flowers, plan of study, 321, 336, 

 Chap. XX, 422, 423, 508; rela- 

 tion to insects, 225, Chap. XX; 

 families, 508. 



Fly, 203, 457, 496. 



Foliage of trees, 361. 



Food, birds, 119, 126. 



Foods, 439. 



Forest, 366, 443; distribution, 364; 

 insect enemies, 221; leaf mould, 

 368; struggle for light, 369; uses, 

 see Forestry. 



Forestry, 360, 504. 



Formicarium, 231. 



Fossils, 502. 



