INDEX 



111 



Cocci (kok'sl), 307 



Cochineal, 422, 452 



Cockroaches, 561 f.; extermination 

 of, 562 



Cocoon, 29, 452 



Coelenterata (se len ter a'ta), 81 



Coelenterates (se len'ter ats), eco- 

 nomic value of, 449 



Colloids, 128, 136 



Color, inheritance of, in animals, 521 



Communicable diseases, transmission 

 of, 310 ff. 



Compounds, chemical, 18 



Conjugation, in Spirogyra, 470 f.; in 

 Farameciicm, 484 



Conservation, of wild flowers, 53 f. ; 

 of soil, 95 f. ; of food supplies, 

 542 f. ; national policy of, 544 f., 

 556; of forests, 553 ff. 



Constipation, I54f. 



Contractility, 37 



Control, in higher animals, 213, 233; 

 by means of knowledge, 588 f . 



Cooking, 152 f. 



Cooperation, 351, 2>73^ 407 ff-, 539» 544 

 Cordata, 86 

 Corolla (ko rol'a), 41 

 Corpuscles, 176; red, 177, 178, 342; 

 white, 177, 178 f., 181, 339, 342, 



343 



Correlation of functions, 33 



Cortex of brain, 220 



Cotton plant, 441 



Cotyledon (kot i le'dfm), 68 



Cranium, 276 



Crops, rotation of, 570 



Crowfoot, economic value of, 438 



Crustacea (krus ta'she a), 82 ; eco- 

 nomic value of, 450 



Crystalloids, 128, 136 



Cucumber, economic value of, 444 



Culex, 323 f. 



Cuts, treatment of, 187 f. 



Cytolysins (si to li'sinz), 342 f. 



Darwin, Charles, 536 f. 



Death rates, from various diseases, 



313; of infants, 359, 374 f. 

 Dermis, 198 

 Development, 286 

 Diabetes (di d be'tez), 177 

 Diagnosis, 398 f. 

 Diaphragm, 132, 162 

 Diastase (di'dstas), 128 



Dick test, 346 n. 



Dicotyledons (di kot 1 le'dunz), 68, 



79; lower, 437 ff.; higher, 442 ff. 

 Diet, and appetite, 141 f. ; studies of, 

 142 f.; and age, 144; and climate, 

 145 f.; balanced, 147 f . ; impor- 

 tance of, 288 



Differentiation, 211 



Diffusion, 126, 127. See also Absorp- 

 tion 



Digestion, 128; in bacteria, 129; in 

 mouth, 131; in stomach, 132 f.; 

 organs of, 132 ff.; in gut, 133 f., 135 



Diphtheria, 303, 311, 340; antitoxin 

 for, 341; vaccination for, 344; 

 Schick test for, 345 f. 



Disease, notions about, 261 ff. ; and 

 bacteria, 262, 303, 304, 327, 338 ff.; 

 relation of mind to, 263 f.; caused 

 by parasites, 302, 303 f., 323 ; symp- 

 toms and causes of, 304 f . ; prevent- 

 ing, 310 ff., 398, 402 f.; mortality 

 rates in, 313; insects and, 317 ff.; 

 controllable agents of, 332 ff.; im- 

 munity from, 338 ff.; biological tests 

 of, 344 f.; and heredity, 346; occu- 

 pational, 393 f.; diagnosis for, 398 f.; 

 treatment of, 399 ff. 



Division of labor, 31 ff., 113, 208 ff., 

 393, 407, 416, 472, 539 f. 



Dominance, law of, 508, 513, 514, 522 



Drowning, 170 ff. 



Drowsiness, causes of, 155, 169 



Drugs, regulations concerning, 358 ff., 

 400 f.; source of, 420 f.; danger of, 

 424 f- 



Dust, and breathing, 163; in industry, 

 381 ff. 



Dysentery, 303, 309 



Ear, 229, 232 ; hygiene of, 236 



Earthworm, respiration in, 176; re- 

 generation in, 482 



Eating, 18; habits of, 139, 148, 152 ff., 

 157, 264; pleasures of, 141, 153 



Echinodermata (e kl no dlir'md td), 

 82, 450 



Economic relations, meaning of, 



429 f. 

 Effector, 220 

 Efferent nerves, 219 

 Elimination of refuse, 193 ff., 265 

 Em'bry o, development of, 45 ; in 



seed, 67 



