INDEX 



Marked letters sound as in ale, senate, am, arm, ask, sof^V, eve, event, end, maker, Ice, 

 ill, old, obey, orb, odd, use, unite, urn, up, food. 



Abdomen of insect, 15 



Absorption, 1 13, 1 15, 126, 135, 136, 177 



Accidents, prevention of, 371 f., 38S ff. 



Ac cH'mat ing, 247 



Accretion, 21 



Adaptation of flowers, 48 f. See also 

 Fitness 



Adenoids, 164, 165 



Ad re'nin, 177, 189 



Adventitious roots, 117, 467 



Afferent nerves, 219 



x^gglutinins (a gldb'ti ninz), 342 



Agriculture. See Plants, Soil 



Air, relation of, to sprouting, 65 f . ; 

 composition of, 1 60 ; and life, 1 60 f . ; 

 and bodily efficiency, 168 ff.; tem- 

 perature standards of, i68f. ; hu- 

 midity of, 169; circulation of, 170; 



^ and forests, 550 



Al bu'men, 102 



Alcohol, affects health, 190, 195; and 

 the senses, 235 ; regulations con- 

 cerning, 360 ; as cause of accidents, 



391 

 Algae (al'je), 78, 431, 470 



Alimentary canal, 131 



Alkaloid, 113, 420; in tobacco, 422 



All life from life, 23 



A me'bi, 58, 59, 61, 129, 178, 209, 227, 



309 

 Amino-acids, 102 



Amoeba. See Ameba 



Amphibians, 285, 456 



Analogy, in animals, 36 f. ; in flowers, 



51 ff. 

 Anesthetics, 401 

 Angiosperms, 79 

 Animals, structure of, i6f. ; activities 



of, 18 f.; compared with plants, 37; 



genealogical tree, 75; useful, 416 ff., 



425 f.; of value to health, 420 f.; 



economic importance of, 448 ff.; 



and seed dispersal, 476 f. ; cell divi- 



sion in, 481 ; regeneration in, 481 f. ; 

 grafting in, 482 f.; spores in, 483; 

 reproduction in, 483 ff.; improved 

 varieties of, 497, 527; improving, 

 498 f.; breeding of, 514, 519 ff.; 

 domestic, 519 f- ; injured by insects, 



^ 566 f.; destructive to birds, 576 



An nel'i da, 82, 450 



Anopheles (anof'elez), 322 ff. 



Antennas, 15, 18, 19 



Antitoxins, 339 f. ; for diphtheria, 341 



Ants, divisior, of labor among, 34; 



_ destructive 562 f. 



Aor'ti, 181, 183 



Appearance, 200 ff. 



Appendix, vermiform, 132 



Appetite, 141 f. 



Arachnida {a rak'ni da), 82 ; economic 

 value of, 451 



Arc, reflex, 218, 222 f. 



Arnica plant, 444 



Arteries, 180, 181, 182 f., 190 



Ar throp'o da, 82, 450 



Ascomycetes (as ko mise'tez), 432 



Asphyxiation, 173 



Assimilation, 21, 37 



Astigmatism, 237 f. 



Astringent, 189 



At'ro pin, 421 



Attitudes, as habits, 265 f. ; worth cul- 

 tivating, 266 ff. 



Auricle, 181 f. 



Autointoxication, 154 



Aves (a'vez), ^-j 



Axon, 221 



Babcock test, 528 

 Bacilli (bdsiri), 307; typhoid, 342 

 Bacteria, 59, 307 ; and nitrogen, 109 f., 

 300 f. ; digestion in, 129; in intes- 

 tines, 137, 154, 302; destroyed by 

 cooking, 153; in teeth, 156; and 

 wounds, 188; and blindness, 239; 



