CONTENTS 



CHAPTER PAGE 



I The Staff op Life 3 



II The History op Tobacco 11 



III The Origin op Fertile Soil .... 16 



IV Different Kinds of Soil 21 



V Different Kinds of Soil {Continued) . 25 



VI Potash and Phosphorus 30 



VII Phosphates and Nitrogen .... 35 



VIII Vegetation and the Atmosphere . . 42 



IX Lime . 47 



X Lime in Agriculture 52 



XI Plaster of Paris 56 



XII Plaster op Paris in Agriculture . . 60 



XIII Natural Fertilizers — Guano ... 65 



XIV The Stalk op the Plant 70 



XV The Root 74 



XVI Buds 80 



XVII Adventitious Buds 84 



XVIII Bulbs and Bulblets 89 



XIX Tubers— Starch 93 



XX Uses op Starch 98 



XXI History op the Potato 102 



XXII Ascending Sap 107 



XXIII Descending Sap 112 



XXIV Tree-Pruning 116 



XXV Pinching — Bud-Nipping 120 



XXVI Making Fruit Trees Bear . . . .124 



XXVII The Seed 129 



XXVIII The Seed's Food-Supply 134 



XXIX Germination 138 



v 



