218 



INDEX 



Foods, H. B., 44-63. 



and the blood, H. B., 108. 



and the muscles, H. B., 151. 



and the nervous system, H. B., 160. 



and the skeleton, H. B., 147. 

 Food substances, 



in corn grains, P. B., 104. 



in human body, H. B., 44. 



list of, P. B., 13. 



manufacture by plants, P. B., 22, 

 60. 



storage of, P. B., 61. 



transfer of, P. B., 50. 

 Foot, 



of grasshopper, A. B., 24. 



of mussel, A. B., 182. 

 Forest conservation, P. B., 138. 

 Forest fires, P.,B., 134, 137, 139. 

 Forests, dangers to, P. B., 137. 

 Formalin as food preservative, H. B., 



24, footnote. 



Fossil bird, A. B., Fig. 47. 

 Fractures, H. B., 148. 

 Fresh air, importance of, H. B., 33, 



129, 151, 160. 

 Frogs, A. B., 101-119. 

 Fronds of ferns, P. B., 161. 

 Frosts, loss of crops due to, P. B., 117. 

 Fruit, 



definition of, P. B., 94. 



hybrid, P. B., 122. 



stalk, P. B., 91, 92. 

 Fruits, P. B., 89-96. 

 Frying, H. B., 53. 

 Fuel, P. B., 133. 

 Function of organ, H. B., 2. 

 Functions of organs, P. B., 27. 

 Fungi, relation to human welfare, 



P. B., 139-153. 

 Fungous diseases, loss of crops due 



to, P. B., 117. 

 Furnace heat, H. B., 138. 



Gall bladder, H. B., 101, Fig. 2. 

 Garden, 



glass-plate, P. B., 102. 



tumbler, P. B., 102. 

 Gastric glands, H. B., 93, Fig. 31. 

 Gastric juice, H. B., 93. 



Generations, alternation of, in fern, 



P. B., 163. 



Generative nucleus, P. B., 77. 

 Genus, plant, P. B., 160, 170. 

 Germination of pollen grains, P. B., 



76. 



Germs, H. B., 23, footnote. 

 Gill arch, A. B., 133. 

 Gill bailer, A. B., 155. 

 Gill chamber, A. B., 155. 

 Gill clefts, A. B., 132. 

 Gill cover, 



of gold fish, A., B. 122. 



of perch, A. B., 121. 

 Gill filaments, 



of crayfish, A. B., 154. 



of fish, A. B., 133. 

 Gill rakers, A. B., 133. 

 Gill teeth, A. B., 133. 

 Gills, 



of crayfish, A. B., 153, 158, Fig. 111. 



of fish, A. B., 132-134. 



of mussel, A. B., 183. 



of tadpole, A. B., 116. 

 Girls, as protectors of birds, A. B., 99. 

 Gladiolus, P. B., 72-74. 

 Glands, 



of intestine, H. B., 97. 



of mouth, H. B., 91. 



of skin, H. B., 140. 



of stomach, H. B., 95. 

 Glass-plate garden, P. B., 102. 

 Glottis, 



of frog, A. B., 101. 



of man, H. B., 125. 

 Goddard, Miss Martha F., P. B., 



193. 



Grafting, P. B., 105-106. 

 Grapes, P. B., 129. 

 Grape sugar, 



composition of, P. B., 14, 15. 



osmosis of, P. B., 33.^ 



test for, P. B., 16. 

 Grasshoppers, A. B., 22-31. 

 Gravel, P. B., 110. 

 Gray matter of nervous system, H. B., 



157. 



Grazing animals, a danger to young 

 trees, P. B., 137. 



