198 



NATURE TEACHING. 



Parallel-veined leaves, 71. 

 Parasites, 33, 170, 

 Passion flower, 45, 5G. 

 Pea, Gun go, 8. 

 .pigeon, 8. 

 ,seed, 2. 

 Peperomia, 41. 

 Periwinkle, 139. 

 Petals, 137, 139, 142. 

 Phosphates, 128. 

 Phosphoric acid, removed 



by crops, 123. 

 Physic- nut, 12. 

 Pistil, 138, 139, 142. 

 Pith, 46. 

 Plant-bugs, 173. 

 food, 81. 

 Plants and the 



atmosphere, 79. 

 .preservation of, 160. 

 Plumbago, 151. 

 Plumule, 3, 

 Pollen, 137, 139. 

 Pollination, 142. 

 Potato, 45, 55, 85. 

 ,sweet, 84. 

 Potash, removed by 



crops, 123. 

 Pumpkin, 9,31, 139, 140, 



143, 157. 



Radicle, 3. 

 Respiration, 80, 93. 

 Root, 2, 27, 42. 

 caps, 28, 35. 

 --hairs, 27, 29, 34. 

 Roots, aerial, 28. 

 and leaves, relation 

 be ween, 77. 

 ,growth of, 29, 35-38. 



Roots, nodules on, 121, 134. 

 ,of seedlings, 7-13, 22. 

 ,uses of, 29. 

 Rose, 38, 40, 46, 59, 63. 



Sago palm, 44. 



Sap, 83. 



Scale insects, 174. 



Scion, 50. 



Screw-pine, 28, 31, 35, 38. 



Scutellum, 13. 



Seed beds, 18. 



boxes, 15. 



leaves, 2. 



Seedlings, 15, 21,34, 53, 



153. 



Seeds, 1, 4, 147. 

 ,dispersal of . 149, 160, 



161. 



.germination of, 5. 

 ,lists to study, 23. 

 ,testing vitality of, 23. 

 Sepals, 139, 142. 

 Shush umber, 58. 

 Soil, 90. 

 ,mechaninl analysis 



of, 108. 



Solanum Melongena, 58. 

 torvum, 58. 

 Spiders, 176. 

 Squash, 9. 



Stamens, 137, 139, 142, 

 Starch, formation of, 81, 



94. 



,test for, 93. 

 Stems, 42. 

 ,structure of, 42, 46, 48, 



56. 



,itses of, 43-45, 55, 

 Stigmas, 140. 



