INDEX (Illustrations are indicated by page numerals in bold-faced type.) Ants, 255; Alcohol, and ability to do work, 413; | Antherozoid, defined, 154, 155. and disease, 412, 422; and longevity, 424; a poison, 345; as a food, 344, 346; effect on blood, 379; effect on bodily heat, 395; effect on digestion, 364; effect on excretion, 397; and their "cows," 256; artificial nest for, 256. Aphids and ants, 256. Appendages of skeleton, 327. Archegonium, 153, 155. effect on intellectual ability, 413; Asexual reproduction, amœba, 193; Asymmetry in oyster, 268. Bacillus, 175. Bacteria, and fermentation, 177; cause disease, 178; from human mouth, 179; in impure water, 433; in milk, 180; in schoolroom, 387; their relation to man, 14. Bean seedlings, 78. Beans, as food, 68. Beaver, 314. Bees, 40, 43, 253, 254. Beer making, 172. Beetle, characters of, 242. Bile, functions of, 360. reasons for study of, 13. Bird, body of, 297. classification of, 308, 311; economic importance of, 304 ; feathers of, 298; feet of, 299; flight of, 298; migrations of, 307; nesting habits of, 303, 304; perching, 309; Bladder, urinary, 391. Blood, amount of, 369; and its circulation, 366; course of, 372; distribution of, 369; exchange in, 376; vessels, congestion in, 394; Bodily heat, affected by alcohol, 395 ; Body, daily fuel needs of, 337; growth of, 150. Breathing, and lacing, 388; hygienic habits of, 388; mechanics of, 384; movements in, 383, 384; rate of, 384. Bronchi, 382. Bruises, treatment of, 378, 394. Bud, structure of, 98, 99. Buds, factors in opening of, 99; Bugs, 242, 243. Bumblebee, 40, 41, 42, 253. compared with moth, 238. Calorie, defined, 333. Calorimeter, respiration, 332. Calyx, 34. Cambium layer, use of, 104, 111. Capillary circulation in frog's foot, 373. Carbohydrates, 24, 331. Carbon, properties of, 21. Dandelion, 86; leaves of, 118. Decay by bacteria, 177. Development, of bee, 254; of frog, 288, 289, 290; in respiration, 384. and absorption, 352; effect of alcohol on, 364; in corn grain, 71; in fishes, 278; in plants, 106; of starch, 356; organs of, 206, 352; Digestive tract in frog, 287. Dipnoi, 284. Eating, hygienic habits of, 363. of birds, 304; of earthworms, 215; of food in roots, 95; of insects, 261, 262, 263, 264, 265; of leaves, 128; of lobster, 228; of mollusks, 269, 271; of parasitic worms, 219; of roots and stems, 109; of starfish, 272; Egg, development of, 200. Egg cell, 37, 153, 155, 227, 280, 288. Embryo sac, 36, 156. Endoderm, defined, 200. Endoskeleton, 275, 279. Entomostraca, 231. Enzyme, action upon fibrinogen, 367; in saliva, 357. Enzymes, 72, 353; in blood, 366, 367; in gastric juice, 358; reversible action of, 366. Epicotyl, 65. Epidermis, 321. Epiglottis, 354. Erosion, by streams, 133, 134; Esophagus, 352, 354, 357. Eustachian tube, 354, 408. Excretion, effect of alcohol upon, 397; in crayfish, 226; organs of, in man, 390. Excurrent tree, 100. defects in, 410; image formed in, 410; of crayfish, 223; of insect, 236. Facets, 236. Family, defined, 157. Fatigue, defined, 378. Fermentation, chemistry of, 172. Ferns, characteristics of, 155. Fibrin, 367. Fibrinogen, 367. Fibrovascular bundles, 88; of a monocotyledon, 108; Filament, 34. Fisheries of world, 282. Fishes, appendages of, 275; protection of, 283. Fission, 30, 192. Flatworms, 216. Flower, color and odor of, 41; dimorphic, 49; fertilization of, 36; pistillate, 47, 68; relation to fruit, 65; Food, in hygiene, 425; necessity of, 405; vacuoles, 191, 193; waste in kitchen, 342; Food taking, in clams, 267; in crayfish, 223; in earthworm, 214; in fishes, 279; in hydra, 202; in insects, 235; in snakes, 295; in the starfish, 272; organs of, 206. typhoid, 240, 260. Food, 24; and dietaries, 330; and health, 420; discovery of value of, 332; |