436 



INDEX 



Eye, defects in, 425; 

 focusing, 425; 



internal structure of, 423, 424 ; 

 longitudinal section, 424; 

 section of retina, 423. 



Factors, determining form of plant, 

 146; 



determining growth of seeds, 77. 

 Fats, in bean, 67. 

 Feather, development of, 293 ; 



structure of, 293. 

 Fehling's solution, formula for, 21. 

 Fermentation, a chemical process, 

 167; 



bacteria in, 169; 



by yeast, 166. 

 Ferments, digestive. See Enzyme. 

 Fern, economic importance of, 156; 



life history of, 154; 



parts of, 152. 

 Fertilization, defined, 34; 



in fern, 154; 



in moss, 158; 



of flowers, 33, 34. 

 Fibrin, 345. 

 Fibrinogen, 345. 

 Fibro vascular bundle, defined, 88; 



in dicotyledonous stem, 109; 



in monocotyledonous stem, 106, 

 107. 

 Fiddler crab, 223. 

 Filament, 31. 

 Fisheries map, 276. 

 Fishes, appendages of, 271 ; 



body of, 271; 



bony, 278; 



breathing in, 272; 



circulation in, 274; 



classification of, 277 ; 



digestive system in, 273; 



economic value of, 275; 



egg-laying habits of, 275; 



elasmo branch, 277; 



ganoid, 277; 



gills in, 272 ; 



gill rakers in, 273; 



lateral line in, 274; . 



lung, 278. 



Fishes, nervous system of, 274; 



senses of, 271; 



skeleton of, 274; 



swim bladder in, 273 ; 



teeth in, 272. 

 Fission, defined, 169; 



in paramcecium, 181; 



of a cell, 26. 

 Flagellates, 185. 

 Flower, fertilization of, 33, 35; 



imperfect, 45; 



irregular (sweet pea), 36; 



parts of, 31; 



relation to fruit, 66. 

 Flower envelope, 31. 

 Flower scar, 104. 

 Follicle, 53. 

 Food, adulterations in, 323; 



carbohydrates, 318; 



defined, 20; 



economy, 323; 



hydrocarbons, 318; 



inorganic, 319; 



need of, 317; 



of birds, 299; 



proteid, 317; 



storage in roots, 95; 



value of mushrooms, 163; 



value of nutritive, 322; 



waste, 325. 

 Forestry, 116. 

 Fowls, 303. 

 Frog, appendages of, 279; 



development of, 280; 



eggs of, 281; 



eye of, 279; 



habitat of green, 279; 



life history of, 280 ; 



protective resemblance in, 279; 



skin of, 279; 



stages of tadpole life, 282. 

 Frond, 153. 

 Fruit, defined, 50; 



dehiscent, 53; 



distinct from seed, 55; 



use of, 66. 

 Fruits, dry, 53; 



economic value of, 62; 



explosive, 60. 



