INDEX 



437 



Fats, amount needed daily, 132 ; 



digestion of, 155 ; 



fuel value, 119-120; 



made in the leaf, 83. 

 Feeble-mindedness, 399, 400. 

 Fehling's solution, 59. 

 Fermentation, 338; 



by bacteria, 339, 340 ; 



by yeast, 337-339. 

 Fern plants, 236. 

 Fertilization, 226, 227; 



of fish eggs, 373, 374; 



see also Pollination. 

 Fertilizers, 342. 

 Fever, cause of, 190. 

 Fibers, vegetable, 330. 

 Fibrin, 164, 165. 

 Fibrinogen, 164, 165. 

 Fibrovascular bundles, in roots, 68 : 



in stem, 89. 

 Fig, pollination, 38. 

 Filament, 32. 

 Filaria, 289. 

 Filter beds, 304, 306. 

 Fins, of a fish, 243, 244. 

 Fisher, Dr. Irving, cited, 134, 262. 

 Fishes, 243, 244, 245; 



artificial propagation, 374 ; 



brain, 200 ; 



circulation, 171, 245; 



classified, 245-246 ; 



conservation, 320-375 ; 



development of young, 374-375 ; 



digestive organs, 244, 245 ; 



egg-laying habits, 372, 373 ; 



fins, 244 ; 



food for man, 352 ; 



food of, 348, 361 ; 



gills, 244 ; 



heart, 245; 



migration, 372; 



swim bladder, 245. 

 Fiske, John, quoted, 325. 

 Fission, of amoeba, 100 ; 



of bacteria, 256 ; 



of Paramecium, 99. 

 Flagella, of bacteria, 96 ; 



of Euglena, 193. 

 Flatfoot, 115. 

 Flatworms, 220, 240. 



Flax, 330. 



Fleas, 285, 286. 



Fletcher, Horace, on mastication, 160. 



Flexner, investigator, 411. 



Flies, 283, 284, 285, 307. 



Floral envelope, 31. 



Flowers, 31, 32 ; 



imperfect, 39; 



pollination of, 35, 36, 37, 38, 39 ; 



relation to insects, 31, 33, 34-39. 

 Fly, 283, 284, 285, 307. 

 Food, definition, 118. 

 Food tube, 116, 147. 

 Foods, absorption, 157, 158; 



accessories, 128; 



adulteration, 138, 139; 



animal, 348-353; 



bacteria in, 258, 343-345 ; 



canned, 343, 344 ; 



care of, 294-296, 299; 



cold storage, 343 ; 



composition, 125-128; 



cost, 131; 



fuel value of, 119; 



functions of, 84, 118; 



in plants, 53, 57, 79-84, 87-92 ; 



made by plants, 79-84 ; 



nutrients, 53, 119; 



organic and inorganic, 53 ; 



plant, 323-329 ; 



preservatives, 344; 



study of, 118-137; 



see also Diet, Starch, Protein, etc. 

 Foraminifera, 355. 

 Forestry, 319-321, 370. 

 Forests, conservation, 319, 320, 369; 



enemies of, 317-319; 



fires, 317, 318; 



of the United States, 315 ; 



relation to water supply, 5, 313- 

 314; 



values of, 5, 314, 316; 



waste, 317. 

 Formaldehyde, 260. 

 Fossils, 250. 

 Fox, 354, 355. 

 Frog, 109-111; 



adaptations, 109; 



an amphibian, 246 ; 



blood corpuscle, 163 ; 



H. NEW CIV. BIOL. — 29 



