INDEX. 



141 



Movements of stems, 52 



of the roots, 51 

 Multiplication, 84 



NITRATPS, 12 

 of soda, 107 



Nitrogen, 12 

 loss of, 125 



Nucleus, 7 



Nutrition, 1 



OBJECTS of cultivation, 117 

 Onions, 87, 127 

 Osmosis, 6 

 Oxygen, in soil, 21 

 inhalation of, 27 

 Ovule, 88 



PARASITES, 29 

 Pasture plants, 95 



grown without manure, 103 

 Perennials, 35 

 Peri^perm, 76 

 Petals, 87 

 Petiole, 22 

 Phosphorus, 13 

 Pistil, 87 

 Pith, 47 

 Plants, carnivorous, 29 



climbing, 69, 70 

 Plant food, 12 

 Plots, unmanured, 103 

 Pollen, 8S 



action of, 88 



quantity of, 87 



transport of, 88 

 Potash salts, 13, 16, 113 



disuse of, 112 

 Potatoes, 16, 36, 86, 118, 127 



pitting of, 119 

 Practical inferences, 21, 61. 92, 116, 



119 

 Protoplasm, 6 



decay of, 134 



its nature, 6 



movement of, 50 



RADICLE, 62, 60, 76 

 Reserve materials, 77 

 transport of, 77, 79 

 Ripening. See Maturation. 



Root, 18, 20 

 action of contact on, 68 

 gravity on, 56 

 heat on, 57 

 light on, 58 

 moisture on, 58 

 cap, 18 

 crops, 118 

 fihrils, 19 

 functions of, 19 

 growth of, 45 

 hairs, 20 



movements of, 51 

 nature of, IS 

 origin of, 18 

 passage through soil, 59 

 Root stock, 35 

 Rothamsted. pastures at, 96 



experiments, 14, 15, 16, 32, 74, 80. 



126, 128 



Rotation, 94, 128 

 Runners, 35 



SALT, 125 

 Salts, 12 

 Sap, 40 

 Seeds, 124 



change of, 130 

 Seed crops, 124 

 Selection, 75, 130 



power of, by roots, 15 

 Sensitiveness," 55 

 Silica, 10 



Sodium, chloride, 113, 123 

 Stamens, 87 

 Starch, 13, 27, 77, 79 

 Starvation, 134 

 Stem, 34 



action of contact on, 69 

 gi'avity on, 67 

 heat on, 69 

 light on, 68 

 moisture on, 69 



growth of, 46 



nature of, 34 



uses of, 38 



work of, 38 

 Stigma, 88 

 Stipules, 22 

 Stomata, 23 

 Straw, 124, 125, 176 

 Struggle for life, 101 

 Style, 88 

 Suffocation, 136 



