INDEX 



Absorption, 40, 87, 1 14, 1 18, 477 ; in 

 nutrition, 260 



Acclimating, 131, 257 



Accretion, 18 



Acetanelid, 257 



Acids, 202 



Activators, 50 



Adaptability, 19, 39 



Adaptation, 19, 55, 56; of flowers, 

 310; and instincts, 244; and pur- 

 pose, 369 



Adenoids, 150 ff. 



Adjustment, 131 



Adrenin, 189 



Adulteration of food, 123, 124 



Adventitious roots, 47, 48, 49 



Afferent nerves, 219, 221, 222, 498 



After-effect, 136 



Agglutinins, 196 



Agramonte, Aristide, 407 



Agriculture, and bacteria, 396 ; biol- 

 ogy and, 4, 67 ; and birds, 429 ; and 

 food supply, 75; and forests, 379; 

 and heredity, 450 ff. ; and insects, 

 417 ff . ; and science, 506 



Air, circulation of, 1 57 ; composition 

 of, 12 ; excess of, 339; and fire, 12 ; 

 and forests, 378 ; humidity of, 157 ; 

 and life, 172-173 ; pollution of, 158, 

 396; and protoplasm, 143; tem- 

 perature standards of, 156 



Air cells of lungs, 148 



Air requirements of man, 154 



Albumen, 51 



Alcohol, 133 ; and Committee of Five, 

 258; and digestion, 135; and fer- 

 mentation, 135; fighting the evil 

 of, 139; and infectious disease, 

 135; and longevity, 134; prohibi- 

 tion of use of, 142 ; reasons for be- 

 ginning to drink, 137 ; and recrea- 

 tion, 140; and the senses, 253; and 

 society, 137, 141 ; and vinegar, 396; 

 and work, 136 



Algas, 295, 298, 480 



Alimentary canal, 81 ff. 



Alkaloid, 74, 202, 203, 257 ; in tea and 



coffee, 254 

 All life from life, 19 

 Alternation of generations, 320 ff. 

 Ameba, 24, 80, 96, 229, 260, 294, 338, 



363. 



American races, 489 



Amino-acids, 109 



Amoeba, see Ameba 



Amphibians, 350, 485 



Anaerobes, 143 



Analysis, 9 



Ancestors of man, 493 ff. 



Ancon ram, 460 



Anesthetics, 259 



Angiosperms, 481 



Animals, alternation of generations 

 in, 326; classification of, 482 ; cold- 

 blooded, 337; colonial, 431, 432; 

 compared with plants, 20 ; genea- 

 logical tree, 483 ; heredity in, 444 ; 

 infancy among, 333 ; reproduction 

 in, 327 ; regulations concerning 

 domestic, 395; useful, and insects, 

 420 



Annelids, 484 



Annual plants, 44 



Anopheles, 404, 406 



Ant lion, 372 



Antheridium, 320 



Antiseptic, 192 



Antiseptic mouth wash, 121 



Antiseptic solution, 192 



Antitoxin, 193 ff. ; for diphtheria, 195 



Ants, colony of, 432 ; destruction 

 wrought by, 413 ; destructive, 415 ; 

 extermination of, 416; honey-pot, 



433 



Aorta, 185 



Appendix, vermiform, 82, 468 



Appetite, 104, 1 1 1 ; loss of, 1 18 ; stimu- 

 lation of, 117, 138 



Arachnids, 484 



Arc, reflex, 220 



Archegonium, 320, 478 



Armors, protective, of organisms, 345 



515 



