578 



INDEX 



Flies, 397. 



Flowers, 76, 196-213; functions of, 

 196. 



Flower-clock, 117. 



Flower-clusters, 208. 



Fluids, digestive, 471. 



Foetus, 453. 



Foods, of animal, 14, 123 ; energy of, 

 495-497; human, 460-465; need 

 of, 44; uses of, 46; of plant, 19, 

 98, 108, 119, 123; of protozoan, 

 304, 309. See also digestion, and 

 metabolism. 



Food-storage, in roots, 158 ; in stems, 

 174 ; in leaves, 192. 



Food-supply, human, 125. 



Forestry, 187. 



Frog, 14-17; anatomy, 25-37; his- 

 tology, 37-44 ; physiology, 44 

 57 ; embryology, 57-64 ; classifica- 

 tion, 65. 



Fruits, 79-81, 216-225. 



Functions, see life-activities. 



Fungi, 245, 252-276; food of, 99- 

 101. 



G 



Gametes, 238. 



Gametophyte, 239. 



Gametospore, 255. 



Ganglion, 352, 512. 



Gases, from organic matter, 11. 

 See also carbon dioxide. 



Gasteropods, 411. 



Gastrula, 349. 



Gelatin plates, 280. 



Generation, spontaneous, 346. 



Generations, alternation of, in fern, 

 238 ; in seed-plants, 239 ; in moss, 

 244; in ccelenterates, 334, 335. 



Geology, and evolution, 565. 



Germ-cells, in heredity, 572. See 

 also egg-cell, sperm-cell. 



Germicides, 285. 



Germination, 84 ; 146-156. 



Germs, 135. See bacteria. 



Gestation, 450. 



Gills, clam, 407; crayfish, 361; 

 embryos, 444; fishes, 419; tad- 

 pole, 62. 



Gill-slits, 444. 

 Girdling, 107. 

 Glands, salivary, 467 ; liver and 



pancreas, 470; 471. 

 Grafting, 175, 227. 

 Grains, 218. 

 Grasshopper, 381, 392. 

 Growth, in living matter, 44 ; foods 



for, 499; secondary in stem, 169. 

 Gullet, see esophagus. 

 Gymnosperms, 213. 



H 



Hsematococcus, 249. 



Haemoglobin, 483. 



Hair, 521. 



Head, of flowers, 210. 



Heart, 487-490. 



Heat, animal, 52 ; effect on bacteria, 

 283 ; in foods, 495, 498 ; in germi- 

 nation, 155; from skin, 522-524. 



Hemiptera, 388. 



Heredity, 571-573. 



Hermaphroditism, 328. 



Hermit-crab, 370. 



Histology, definition of, 22 ; of frog, 

 37-44. 



Horse, fossil, 439. 



Horse hair worm, 345. 



Human biology, 455. 



Hydra, 324-329. 



Hydranth, 332. 



Hydroids, 330-335. 



Hydrophobia, 296. 



Hygiene, 525-561. 



Hymenoptera, 389. 



Hyphas, 252, 264. 



Hypocotyl, 83, 154. 



Ichneumon-fly, 391. 



Imago, 383, 384. 



Immunity, 294. 



Incubation, chick, 448. 



Inflorescence, 208. 



Infusoria, 319. 



Inheritance, 571. 



Inoculation, 256; protective, 296. 



