692 



INDEX 



Aristotle, on progressive development, 

 665 



Arteries, 395 ; structure of, 398 



Arteriosclerosis, cause of, 401 



Arthropoda, 232-242 ; characteristics of, 

 232-233 ; classification of, 232 



Artificial propagation, of fishes, 591-592 



Artificial respiration, 408-409 



Artificial selection, 605-606, 633-634 



Arum family, of flowers, 208, 209 



Asexual reproduction, of Paramecium, 

 221. See Vegetative propagation 



Associative axon, 431 



Audubon, work on birds, 668-669 



Auricles, 396, 397 



Autonomic, nervous system, 430; func- 

 tions of, 434 



Axial skeleton, 319 



Axon, associative, 431 ; motor, 431 ; of 

 neuron, 431 ; sensory, 431 



Bacillum, form of bacteria, 183 



Bacillus pestis, cause of bubonic plague, 

 491 



Bacteria, aerobic, 186 ; anaerobic, 186 ; 

 and air, 186; cause of pus, 317; 

 control growth of, 457-461 ; diseases 

 caused by, 463-470 ; demonstration to 

 show effect of temperature on, 457; 

 destruction of white corpuscles, 388 ; 

 effect on food, 185-186 ; forms of, 183 ; 

 how cause diseases, 461-463 ; how 

 discovered, 181 ; how get for study, 

 181-182; pure culture of, 182 ;^ rela- 

 tion to fermentation, 187 ; relation to 

 free nitrogen, 187-188; size of, 183; 

 things done by, 186-189 ; what are, 

 181; where found, 183-184; where 

 numerous, 184-185; work done by, 

 1-2, 185-189 



Bacterial diseases, 461-463 ; and milk, 

 468 ; and water supplies, 467 ; diph- 

 theria, 466; how get, 463-470; im- 

 munity to, 474-481 ; necessity of 

 quarantine in, 471-473 ; septic sore, 

 throat, 470; spread through mouth 

 spray, 466 ; tetanus, 470 ; tubercu- 

 losis, 464-465; typhoid fever, 466- 

 467 



Bacteriology, definition of, 1 



Balance of life, 55-56 



Balance of nature, and man, 288-290 



Banting, Dr., work with insulin, 395, 

 600 



Bark, of tree, structure of, 166-167 ; use 

 of, 167-168 



Barriers, and effect on living things, 

 305-308 



Basal metabolism, meaning of, 341 



Bast fibers, 166, 168 



Bathysphere, of William Beebe, 653 



Bean, growth of plant, 136 ; laboratory 

 exercise on seed, 117; nutrients in; 



seed, 119-120; stages in growth, 122- 

 123 ; structure of seed, 117 



Beebe, William, 653 



Beetle, carrion, 561 ; Japanese, 564-565, 

 567 ; life history of, 76-77, 563 ; lady- 

 bird, 561 ; potato, 77 



Beetles, classification of, 60-61, 238 



Biology, activities connected with study 

 of, 7—16 ; and conservation, 2 ; and 

 self-improvement, 644-654 ; early 

 workers in, 657-659 ; economic values 

 of, 2-7; how to study, 6-16; in 

 relation to society, 4 ; makers of, 656- 

 672 ; meaning, 1 ; prepare for voca- 

 tion, 649-654 ; reading values of, 3 ; 

 where to study, 4-6 ; why study, 1-4 



Birds, adaptations of, 260-263 ; care of 

 young, 266 ; classification of birds, 

 267 ; common, 551-560 : bluebird, 

 552-553 ; catbird, 556-557 ; chickadee, 

 553-554 ; crow, 559 ; downy wood- 

 pecker, 557 ; English sparrow, 559 ; 

 flicker, 557, 558; goldfinch, 555; 

 oriole, 557-558; phoebe, 555-556; 

 robin, 552 ; screech owl, 558, 559 ; 

 song sparrow, 554-555 ; swallow, 556 ; 

 warbler, 555, 559 ; wren, 554 ; eco- 

 nomic importance of, 547-551 ; food of, 

 546-549; harmful, 559-560; home 

 methods of conservation of, 594-597; 

 migration of, 595-596 ; nervous system 

 of, 264 ; nesting habits of, 264, 265, 

 266 ; relation to reptiles, 266-267 ; 

 reproduction of, 618-619 ; respiration 

 of, 263-264; sense organs of, 264; 

 state and federal government methods 

 of conservation, 596 ; used for food, 

 536 ; work of Audubon on, 668-669 



Blackberry, production of white, 672 



Black stem rust, 195-196, 197 



Bladder, swim, of fish, 246 



Blastula, 617 



Blister rust, 196 



Blood, cause of clotting, 388-389; cir- 

 culation of, 395-401 ; circulation in 

 fish, 246-247 ; circulation in frog, 251- 

 252 ; composition of, 386 ; corpuscles 

 of, 386-389 ; effect of alcohol on, 402 ; 

 how food gets into, 377-397 ; platelets, 

 389 ; pressure of, . 399 ; relation of 

 lymph to, 389 ; transfusion of, 391 



Blood plasma, composition of, 386; 

 disease-resisting function of, 390-391 



Blood platelets, function of, 389 



Blood serum, 388, chemical composition 

 of, 20-21 ; compared with sea water, 

 20-21 



Blood vessels, 395 ; structure of, 398- 

 399. See Arteries, Capillaries, and 

 Veins. 



Bluebird, 552-553 ; food of, 548 



Body: how body protects itself, 475-476 ; 

 regulation of heat of, 415 



