INDEX 



cooking, functions of, 354. 



coral polyp, 157; coral reefs, 470. 



cork, harvesting, 460. 



corn, structure of, 36, 449. 



cornea, 421. 



corolla, 109, 110. 



corpuscles, white, 138, 395; red, 395. 



cortex, root cells, 51, 56; stem, 78. 



cotton, 455; Sea Island, 458. 



cotyledons, 32, 44. 



crabs, "soft shell," 188; use as food, 



472. 



crayfish, structure of, 179-185. 

 crop rotation, 487, 488. 

 Crustacea, 172, 179; as food, 472. 

 culture medium, 133, 135. 

 cuttlefish, produces sepia, 472. 



D 



dandelion, 70, 121, 122. 



Darwin, Charles, his "Origin of 

 Species by Natural Selection," 

 326; chief factors to account for 

 development of new species from 

 common ancestry, 327; revolution- 

 ized modern thought, 541. 



Davenport, 331. 



deliquescent, 69 



diaphragm, 385, 387. 



dicotyledonous (having two coty- 

 ledons), 33, 79, 81. 



diet, need of mixed, 346. 



digestive system, of earthworm. 161; 

 of fish, 243; of frog, 258; of bird, 

 287; of man, 363-375. 



diptera (two- winged), 220. 



diphtheria, 137, 140. 



diseases, eye, 137; transmission of 

 by insects, 232. 



"disease germs," 150; prevention of, 

 442. i 



disinfectants, 140. 



distillation products, from plants 

 (wood), 461. 



dogfish, 247. 



drainage, regulated by forests, 447. 



drone, 213, 215. 



ducts, root, 51, 56; stem, 78. 



dyes, vegetable, 461. 



drugs, from plants, 461; danger of 



drug habit, 511. 

 dysentery, 151; caused by protozoa, 



469. 



ear, various locations of, 416; 

 structure of human, 417; wax, 

 418; ache, 418; infection of, 432. 



earthworm, 157; structure, 161, 162; 

 locomotion, 162; food, value of, 

 165, 470. 



echinoderms, 470. 



Ehrlich, Paul, famous for method of 

 treating syphilis, 540. 



elements of matter, 9. 



elm, 121. 



embryo, plant, 31, 32, 43, 114; de- 

 velopment of fish, 246; study of 

 development of all animals, 322 



embryological resemblances, 322. 



endosperm, 31, 33, 113. 



energy, 342; source of, 526, 527. 



environment, 415. 



enzymes (or ferments), 363, 374. 



epidermis, root, 50, 56; stem, 78; 

 leaf, 90. 



erosion, 497. 



erysipelas, 137. 



eustachian tubes, 365, 417. 



evolution, idea and evidences of, 321, 

 322; method of, 326; of life 

 functions of plants, 532; of life 

 functions of animals, 533. 



excretion, 6; system of in earth- 

 worm, 162; in insecta, 198; of frog, 

 261; organs of, 403; effect of 

 alcohol on, 517. 



excurrent, 69. 



exercise, importance of, 426-428; 

 beneficial, 436. 



exo-skeleton, of crayfish, 180; of 

 grasshopper, 193. 



expiration (breathing out), 386, 387. 



eye, structure of human, 419, 420; 

 compared to camera, 421. 



