432 



INDEX 



Antheridium, in fern, 154, 155; 



in liverworts, 159; 



in moss, 158. 

 Ants, life history of, 253 ; 



talking of, 254. 

 Ants' nest, artificial, 252, (note) 



253. 

 Aphids, 247; 



life history of, 248. 

 Aphids and ants, 249. 

 Appendages, in crayfish, 217; 



in frog, 371, 374; 



in man, 372, 374. 

 Apple, study of, 51. 

 Apple and blossoms, 51. 

 Archegonium, in fern, 154, 155; 



in Liverwort, 159; 



in moss, 158. 

 Arteries, structure of, 353, 354. 

 Arthropoda, 227. 

 Ascent of sap, causes of, 113. 

 Ascospores,166. 

 Ascus (plu. asci), 166. 

 Asexual reproduction in coral, 201; 



in fern, 155; 



in hydroids, 199; 



in mold, 160; 



in moss, 158; 



in paramcecium, 181. 

 Astigmatism, 426. 

 Asymmetry, 223, 263. 

 Auricle, 352. 

 Automatic acts, 408. 



Bacteria, diseases caused by, 170; 



habitat of, 168; 



in fermentation, 169; 



method of study, 169; 



relation to nitrogen, 94; 



size and form, 169. 

 Bacteroids forming in root cells, 94. 

 Bark, uses of, 109. 

 Barnacles, 225, 226. 

 Bast fibers, 109. 

 Bean, study of, 66. 

 Bee, attractions offered by flower to, 

 38. See Bumblebee and Honey- 

 bee. 

 Beer making, 168. 



Beetles, economic importance of, 245 ; 



life history of, 245; 



sexual dimorphism in, 246; 



structure of, 244; 



useful to man, 246. 

 Berry, 52, 53. 

 Bile, 339. 



Biology defined, 11. 

 Birds, adaptations in, 293, 296; 



bills of, 295, 296 ; 



care of young, 298; 



classification of, 302, 306; 



extermination of, 300; 



feather of, 292, 293; 



flight of, 292; 



food of, 299; 



harmful to man, 298; 



high temperature in, 295; 



migrations of, 301; 



nervous system of, 297; 



nesting habit of, 297; 



nests of, 297, 298; 



protection of, 292; 



relationship between reptiles and- 

 305; 



skeleton of, 294, 295; 



tail of, 293. 

 Birds of prey, 304. 

 Bison, 315. 



Biuret test, (note) 337. 

 Bladderwort, 139. 

 Blade of leaf, section through, 24. 

 Blastula, formation of, 192. 

 Blood, amount of, 348; 



changes of, in body, 357; 



clotting of, 345; 



corpuscles in, 344, 345, 347; 



course of, 356, 357; 



distribution of, 348; 



function of, 344; 



haemoglobin in, 346; 



Metchnikoff on, 346; 



phagocytes in, 347; 



plasma in, 344 ; 



relation of food, air, and sleep 

 to, 348; 



temperature of, in cold-blooded 

 animals, 348; 



temperature of, in man, 348. 



