INDEX 



577 



Decapods, 369. 



Decomposition, by bacteria, 289. 



Dennis, 519. 



Development, embryonic, of frog, 57- 

 63; of plant, 198. See also 

 embryology. 



Diaphragm, human, 469, 504. 



Diastase, 105. , 



Dicotyledon, stem, 169-173. 



Diet, 529 ; mixed, 501. 



Diffusion, see osmosis. 



Digestion, animal, 46-49 ; crayfish, 

 366; frog, 46-49; human, 471- 

 481 ; Hydra, 326 ; hygiene of, 528- 

 533 ; plant, 105, 120. 



Dioecious, 243. 



Diptera, 389. 



Disease, bacterial, 291, 554-560; 

 human, 262 ; and insects, 393-398 ; 

 of plants, 259-261 ; and proto- 

 zoans, 291, 312-315. 



Disinfection, 285, 558. 



Dispersal, of fruits and seeds, 223. 



Dissection, of animals, 25. 



Division, Amceba, 310; Parame- 

 cium, 302. See also cell-division. 



Dorsal, 26. 



Drugs, 553. 



Dust, 527. 



E 



Ear, 518. 



Earthworm, 349-353. 



Eating, hygiene of, 528. 



Echinoderms, 355-357. 



Economics, of seed-plants, 231 ; 

 ferns, 241 ; fungi, 246-263 ; mush- 

 rooms, 267 ; algae, 251 ; yeasts, 

 275 ; bacteria, 286-291 ; proto- 

 zoans, 312-316; ccelenterates, 

 339; worms, 340-345, 350; echi- 

 noderms, 356; decapods, 372; 

 arachnids, 378; insects, 390- 

 398; mollusks, 414-416; fishes, 

 422-424; amphibians, 425, 426; 

 reptiles, 427, 428 ; mammals, 

 441. 



Ectoderm, 322, 325. 



Egg-cell, animal, 58; plant, 79; 

 fern, 236. 



2p 



Elements, chemical, 6. 



Embryo, animal, 59-62; bean, 83; 

 and evolution, 564; fish, 443; 

 frog, 59-62; fern, 238; mammal, 

 449-453; plant, 198. See also 

 reproduction. 



Embryology, definitions, 17. See 

 embryo, and reproduction. 



Endoderm, 322, 325. 



Endosperm, 149. 



Energy, 124 ; in animals, 45 ; conser- 

 vation of, 492-494; of human 

 body, 494 ; in foods, 495-497. 



Entomology, 380. 



Enzyme, 110, 129, 274. See also 

 under digestion. 



Epicotyl, 83, 153. 



Epidermis, 37 ; plant, 174. See also 

 skin. 



Epithelium, 37. 



Erosion, and roots, 161. 



Esophagus, human, 469. 



Eustachian tube, human, 468, 519. 



Evaporation, 93, 95. 



Evolution, 561-571. 



Excess, in food, in exercise, 538. 



Excretion, animal, 53 ; animal and 

 plant compared, 126 ; frog, 53 ; 

 human, 507; Hydra, 328; nitro- 

 gen, 499; plant, 113-115; proto- 

 zoans, 126 ; worm, 352. 



Exercise, 537. 



Exoskeleton, 359. 



Eye, human, 515. 



Fairy-rings, 265. 



Fats, 463. 



Feather, 431. 



Fehling's reagent, 461. 



Fermentation, 268. 



Ferns, 233-241. 



Fertilization, animal, 59 ; plant, 79, 



197, 216, 236. 

 Fertilizers, for soils, 99. 

 Fibrin, 485. 

 Fishes, 419-424. 

 Flagella, 248, 322. 

 Flea, 387, 389. 



