INDEX 



Aerial roots, 102. 



Ailanthus fruit, 92. 



Air, need of, for growth, 67. 



relation of, to soil, 111. 

 Air roots, 102. 

 Air spaces, 60, 62, Fig. 22. 

 Alcohol, formed by yeast, 147. 

 Algae, 166-169. 

 Alternate arrangement, 52. 

 Alternation of generations, in fern, 

 163. 



in moss, 166. 

 Angiosperms, 159, 170. 

 Annual, an, 156. 

 Annual rings, 47, 51, Fig. 17. 

 Annual scars, 55. 

 Anther, 71, 73, 81, 88, Fig. 25. 

 Antheridia, of fern, 162, Fig. 83, D. 



of moss, 164. 



Apparatus, price-list of, 173-175. 

 Apple, fruit, Figs. 37, 38. 



leaves, Fig. 19. 

 Archegonia of fern, 163, Fig. 83, F. 



of moss, 164, Fig. 84. 

 Artificial crossing of related species, 



120. 



Artificial selection, 119. 

 Asexual generation, of fern, 163. 



of moss, 166. 

 Asparagus, 127. 

 Assimilation, 31. 



Bacillus form of bacteria, Fig. 71, 



B, C, D. 



Bacteria, 140-145, Fig. 71. 

 Bamboo, 49, Fig. 18. 

 Bark, 45. 

 Bast, 46. 

 Bean fruit, 89. 

 Bean seed, 97-100. 

 Bee, Figs. 30, 31 



Beggar's ticks, 93. 



Benzine as used in testing for fat, 20. 



Beverages, 128-130. 



Bidens, 93. 



Biennial, 158. 



Biology, definition of, 4. 



Blade of leaf, 55. 



Body, cell-, 28, 29. 



Books, list suggested for reference, 



197-199. 



Botany, definition of, 4. 

 Bread-making, 148. 

 Bread mold, 149-151. 

 Breathing in plants and animals, 69. 

 Budding of yeast, 146, Fig. 74. 

 Buds, 53. 



of yeast, 146. 

 Bud-scales, 53. 

 Bud-scale scars, 55. 

 Bulbs, 108. 

 Bumblebees, 81. 

 Burbank, Luther, 122. 

 Burdock, 93. 

 Burs, 93. 



Cabbage, 127. 



Calyx, 71, 79, 88. 



Cambium, 46, 51, 63. 



Camphor, 129. ' 



Capsule of moss, 164. 



Carbohydrates, meaning of, 13, 14. 



composition, 13, 14. 



manufacture of, 24, 60, 69. 

 Carbon, 6. 

 Carbon dioxid, 7, 8. 



in air, 11. 



necessary for starch manufacture, 

 23. 



formed in growing plants, 68. 



formed by yeast, 147. 

 Castor bean seedling, Fig. 44. 



201 



