422 



INDEX 



Codling moth, 215. 

 Ccelenterates, 183. 

 Cold-blooded animals, 318 ; 



effect of, 23. 

 Cold storage, 147. 

 Colds and fevers, 343. 

 Coleoptera, 32. 

 Collecting ashes, 387. 

 Colonies of bacteria, 141 ; 



of trilliums, 175. 

 Colorless corpuscles, 313 ; 



structm^e, 315 ; 



function, 316. 

 Common foods contain nutrients, 



275. 

 Comparison, of food tube of frog and 

 man, 297 ; 



of mold, yeast and bacteria, 143 ; 



of starch making and milling, 

 92. 

 Complemental air, 334. 

 Complex one-celled animals, 171. 

 Composition, of milk, 273, 280 ; 



of plasma, 313 ; 



of soil, 77. 

 Compound eyes of bumblebee, 37, 



38. 

 Conservation, of food fish, 239 ; 



of fur-bearing animals, 204 ; 



of our natural resources, 17. 

 Constipation, 310. 

 Constrictor kilHng a mouse, 213. 

 Contagious diseases, 152. 

 Convolutions, 352. 

 Corn, 120, 121 ; 



germinated grain cut lengthwise, 

 69; 



long section of ear, 67 ; 



structure of grain, 66. 

 Cornfield, 44. 

 Corolla, 35. 



Corpuscles, colorless and red, 313. 

 Cost of food and diet, 281, 283 ; 



of parasitism, 263. 

 Cotton, 125 ; 



boll weevil, 126, 127, 214. 

 Cotyledons, 59 ; 



food in, 60. 

 Crab, 199. 



Crayfish, 184. 

 CrocodUe, 230. 

 Crocodilia, 189. 

 Crustacea, 185. 

 Culex, 218, 218. 

 Culture medium, 140. 

 Cuts and bruises, treatment, 326, 

 345. 



Daily calorie requirement, 282 ; 



fuel needs of body, 284. 

 Dandelion, whorled leaves, 90. 

 Darwin, Charles, 40, 404. 

 Darwin and natural selection, 253. 

 Deaths, table, 312. 

 Decay caused by bacteria, 149. 

 Decayed teeth, 396. 

 Defects in eye, 361. 

 Deforestation in China, 108. 

 Dendrites, 351. 

 Department of Agriculture, work of, 



255. 

 Department of street cleaning, 



387. 

 Determiners, 251 ; 



of character, 258. 

 Development, of apple, 56 ; 



of bird, 246 ; 



of egg, 178 ; 



of trout, 238 ; 



of mammal, 247 ; 



of salmon, 241 ; 



of simple animal, 177. 

 Diagram of frog's tongue, 242 ; 



of gills of fish, 235 ; 



of neuron, 351 ; 



of wall small intestine, 307. 

 Diaphragm, 270, 297. 

 Diastase, 101, 300; 



action on starch, 69. 

 Diet, and cost of food, 281 ; 



and digestibility, 281 ; 



balanced, 285 ; 



relation of age, 280 ; 



relation of environment to, 280 ; 



relation to sex, 280 ; 



relation of work to, 277 ; 



the best, 284. 

 Dietary, the best, 282. 



i 



