6 



INDEX 



References are to pages 



Bubonic plague, a bacterial 



disease 2.34 



Bud, in reproduction of yeast 



plant 356 



Budding 1 (fig.) 287 



Budding- cells of yeast . . . 356 



Buds, a characteristic of stems . 286 



Buffalo (fig.) 158 



Bugs, members of Hemiptera . 20 



Bullfrog 123 



Bullhead (fig.) 105 



organs of smell in 109 



Bull snake, with hen's egg in 



mouth (fig.) 130 



after swallowing egg (fig) . • 130 



Bull thistle (fig.) 396 



Bumble bee, carrier of pollen 



for red clover 304 



economic value of 35 



Burbank's work . . . .306,402 



Burdock, common weed . . . 334 



distribution of seed .... 312 



by animals 313 



in blossom (fig.) 311 



Bur reed, a fruit distributed by 



water 314 



Bushman, environment of . . 127 

 Butcher bird, food of . . . 22, 26 



Butter, example of fat .... 176 



flavor of, due to bacteria . . 349 



indirect product of plants . . 401 



value of as food 178 



Buttercup, characteristic mem- 

 ber of crowfoot family . . 327 



study of pollination of . . . 305 

 Butterflies, classified . . . . 6, 20 



complete metamorphosis of . 19 

 Butterfly, swallowtail, from 



celery worm 34 



larvae of 28 



pollinating Persian lilacs (fig.) 299 



Buzzards, food of 147 



C 



Cabbage, member of mustard 



family 328 



plant (fig.) 292 



Cabbages, laboratory study of 404 



storage of food in 294 



value of as food 178 



Cactus, giant (fig.) 395 



Calcareous skeleton of coral 69 



Calcium, a chemical element . 9 

 Calcium phosphate, in Pasteur 



solution 356 



Calla lily (fig.) 403 



Calorie, defined 177 



Calyx, described 296 



Cambium, change to xylem . . 287 



change to phloem 287 



Cambium layer in woody stems 287 

 Camel, economic importance of 



(fig.) 154, 158 



Canada ginger, storage of food 



in (fig.) . ... \ ... 291 



Canada thistle (fig.) .... 336 

 Canal, alimentary, of frog 



(fig.) 163 



of man (fig.) 165 



Cancer, quacks and 244 



Cane sugar in Pasteur solu- 

 tion 356 



Canine teeth 167 



Canker worms 28 



Canning of beans 317 



Cap fungi (fig.) 357 



Capillaries, described (fig.) . . 202 



Capillarity 276 



Capillary circulation (fig.) . 198 



Capsule, a form of fruit (fig.) . 308 



dehiscent fruit 310 



fruit of lily 327 



of moss 364 



Capsule containing eggs of 



earthworm 83 



Caraway, member of parsley 



family 329 



Carbohydrates, a class of food 169 



stored by bean 265 



Carbolic acid, a disinfectant . 253 



a poison 221 



Carbon dioxide, a waste prod- 

 uct of respiration . . . . 3, 9 

 formed by yeast plant . . . 355 

 how obtained by water plants 394 

 product of respiration only . . 276 

 taken from the air by plants . 401 

 Carbonic acid gas, formed by 



oxidation 9 



Cardiac valve of stomach . 168 



