434 



INDEX 



Cells, respiration, 179, 180; 



sizes and shapes, 49 ; 



structure of, 45-46 ; 



supply of lymph, 168. 

 Centipede, 28, 241. 

 Centrosomes, 48. 

 Cereals, 325-328; 



value as food, 120, 123, 124, 129. 

 Cerebellum, 199, 201. 

 Cerebro-spinal meningitis, 266. 

 Cerebrum, 199, 201. 

 Cesspools, 265, 296. 

 Cestodes, 287. 

 Cetacea, 249. 

 Chalk, 355. 

 Change of air, 186. 



Characters, inheritable, 388, 397, 401. 

 Cheese, flavored by bacteria, 340; 



flavored by mold, 336. 

 Cheiroptera, 249. 

 Chelonia, 247. 

 Chemical compounds, 9. 

 Chemical elements, 8. 

 Chemist's view of the environment, 



8. 

 Chemotropism, 17. 

 Chestnut bhght, 318, 335. 

 Chewing of food, 152, 159. ' 

 Chicago, drainage canal, 305, 348. 

 Chicken cholera, 274. 

 Chicken pox, 269. 

 Chitin, of insect, 25. 

 Chittenden, Professor, cited, 132, 140. 

 Chloride of hme, 260. 

 Chlorophyll, 45, 81. 

 Chloroplasts, 45, 81; 



work of, 82, 83. 

 Chocolate, value as food, 139. 

 Cholera, 266, 276. 

 Chromosomes, 46; 



bearers of heredity, 381, 383, 396 ; 



in cell division, 47, 48 ; 



sex-determining, 383. 

 ChrysaHs, 29, 229. 

 Ciha, 96, 98. 

 Circulation of the blood, 169-174, 171 ; 



discovery of, 406 ; 



effect of exercise on, 174 ; 



portal, 172. 

 Citizenship, lessons of biology, 6. 



City, environment, 21, 22; 



health problems, 298-311; 



need of trees, 320. 

 Civihzation, 250, 394; 



and cereals, 325. 

 Clams, 349, 361, 371. 

 Class, in classification, 235. 

 Classification of plants and animals, 



234. 

 Clothing, discussed, 187. 

 Clotting of blood, 121, 164-165. 

 Clover, aid to soil fertility, 341, 342 ; 



change in position of leaves, 194. 

 Coal, 57. 



Cocaine, 143, 144, 331. 

 Coccus, 96, 256. 

 Cochineal, 357. 

 Cochlea, 204. 

 Cockroach, 27, 364. 

 Cocoa, 139. 



Cod liver oil, value as food, 123. 

 Codfish, 352, 372. 

 Codling moth, 363. 

 Ccelenterata, classified, 239, 240. 

 Coelhelminthes, 241. 

 Coffee, 139. 

 Cold storage, 343. 

 Colds, 190, 264, 298; 



communicable, 190, 268. 

 Coleoptera, 27, 28, 242. 

 Colorless corpuscle, 163, 164, 168, 174 ; 



effect of alcohol, 175. 

 Communicable diseases, work of 



health board, 309. 

 Compound, defined, 9. 

 Condiments, 128, 329. 

 Conjugation, 223. 

 Conifers, 237. 

 Conservation, 368-379; 



methods of, 369 ; 



of birds, 375-378; 



offish, 370; 



of forests, 369, 370; 



of mammals, 377-378. 

 Constipation, 159. 

 Contractile vacuoles, 98. 

 Coppice growth, 320. 

 Coral, 356. 

 Corn, germination, 58-60; 



pollination, 39; 



