INDEX 



433 



Coal, formation of, 62, 63, 64 

 Cochlea, 408 

 Coelenterates, 269 

 Coke, 64, 65 

 Complex animals, 274 

 Condensation, 46 

 Conduction, 20, 22 

 Continents, 160, 162 

 Convection, 22, 138, 139 

 Cooking, 307 

 Corals, 198, 269 

 Corolla, 233 



Corpuscles, destroying germs, 

 414 



red, 335 



touch, 397 



white. 336, 368, 414 

 Cortex, 227. 228 

 Crayfish, 264 

 Cretinism, 368 

 Crops, animals injurious to, 289 



rotation of, 222 



value in U. S., 206 

 Crustacea, 264 

 Crystalline lens, 400 

 Cyclones, 141 



Darwin. Charles. 236 



Day, 151 



Decay, due to bacteria, 246, 308 



Dendrites, 384 



Dermis, 360 



Dew. 125 



point, 125 

 Diabetes.. 369 

 Diamond, 65 

 Diaphragm, 317 

 Diffusion, 6, 9, 10, 11, 221. 322, 



323. 324, 325 

 Digestion, absorption, 325 



in animals, 276 



in intestine, 324 



in mouth, 322 



in plants, 207 



in stomach, 323 



large intestine, 324 



necessity of, 312 

 Digestive system, 310ff. 

 Disease, cause of, 411 



contagious, 354 



due to bacteria, 245 



due to insects, 424 



due to worms, 308 



germs, 412, 413, 414, 421 



health and d., 41 Iff. 



immunity from, 419 



medicines, 417 



of bones, 375 



of glands, 368, 369 



of respiratory organs, 353 



of the ear, 409 



of the eye, 405 



preventable, 421 



produced and carried by ani- 

 mals, 289 



some methods of prevention, 

 422, 423, 424 



treatment of, 415, 416 

 Disinfection, 422 

 Dislocation of bone, 377 

 Distillation, 41 

 Dust, 121, 124 ? 164 



Ear, drum, 407 



structure, 406 

 Earth, orbit of, 152, 153 



surface of. 160ff. 

 Echinoderms, 268 

 Education. 394 

 Eggs, development of, 283 



fertilized, 235, 262, 283 

 Electrolysis, 110 



