216 



INDEX 



Division of cell, P. B., 30. 

 Dorsal, A. B., 8. 

 Drainage, P. B., Ill, 114. 

 Drawings, in laboratory, H. B., 181, 



Figs. 90, 91. 



Drone bee, A. B., 36, Fig. 24. 

 Drugs, P. B., 130; H. B., 78-81. 

 Dry fruits, P. B., 96. 

 Ducts, P. B., 45, 50, 62, Fig. 14. 

 Dusting, proper method of, H. B., 26. 

 Dustless dusters, H. B., 26. 

 Dyspepsia, H. B., 103. 



Ear, 



of bird, A. B., 65. 



of man, H. B., 166-167. 

 Eardrum, H. B., 166. 

 Earthworm, A. B., 179. 

 Earwax, H. B., 166. 

 Economic importance, 



of bees, A. B., 42. 



of birds, A. B., 83-91. 



of butterflies and moths, A. B., 13- 

 22. 



of Crustacea, A. B., 162. 



of fish, A. B., 141-144. 



of frogs and toads, A. B., 118. 



of grasshoppers, A. B., 30. 



of mammals, A. B., 189. 



of protozoa, A. B., 173. 

 Economy, in relation to foods, H. B., 



56-60. 



Eel, A. B., Fig. 96. 

 Effects of bird destruction, A. B., 96. 

 Egg cell, 



of bee, A. B., 36. 



of bird, A. B., 70. 



of butterfly, A. B., 11. 



of crayfish, A. B., 159. 



of fish, A. B., 137. 



of frog, A. B., 114. 



of grasshopper, A. B., 28. 



of plants, P. B., 77. 

 Eggs, 



of bee, A. B., 36. 



of butterfly, A. B., 11, Fig. 6. 



of crayfish, A. B., 159. 



of fish, A. B., 137. 



of frog, A. B., 114, Fig. 84. 



of grasshopper, A. B., 28, Fig. 19. 



of hen, A. B., 69, Figs. 52-54. 



of house fly, A. B., 57, Fig. 41. 



of humming bird, A. B., Fig. 56. 



of lobster, A. B., Fig. 112. 



of mosquito, A. B., 43, Figs. 31, 32. 



of ostrich, A. B., Fig. 56. 

 Egret, A. B., Fig. 75. 

 Element, definition of, P. B., 12. 

 Elm fruit, P. B., 92. 

 Elodea, P. B., 25, 28, Fig. 5. 

 Embryo, 



of crayfish, A. B., 159. 



of fish, A. B., Fig. 103. 



of frog, A. B., 116, Fig. 86. 



of hen, A. B., 70, Figs. 52, 54. 



of plants, P. B., 77, 98, Fig. 29. 

 Enamel of tooth, H. B., 88, Fig. 



30. 

 Endosperm, P. B., 101. 



use of, P. B., 104. 

 Energy, 



definition of, P. B., 64. 



liberation of, A. B., 113, 135, 158; 

 P. B., 66, 67; H. B., 123. 



source of, P. B., 66. 



transformations of, P. B., 65. 

 English sparrow, A. B., 88, 97. 

 Enlargement of chest cavity, H. B., 



130. 

 Epidermis, 



of human body, H. B., 139. 



of leaf, P. B., 56, 61, 62, Figs. 21, 22. 



of root, P. B., 44, 62. 



of stem, P. B., 51, 62. 

 Epiglottis, H. B., 126. 

 Equipment of laboratory, H. B., 171- 



177. 

 Erosion, as result of destruction of 



forests, P. B., 137. 

 Essential organs, P. B., 71, 73. 

 Eustachian tubes, H. B., 167. 

 Evergreen trees and shrubs, P. B., 



158. 

 Excretion, 



of amoeba, A. B., 171. 



of paramecium, A. B., 166, 169. 



of water in plants, P. B., 61. 

 Excurrent siphon, A. B., 184. 



