4 CONTENTS. 



THE EXCRETORY THEORY 121 



Is THE WALNUT POISONOUS? 124 



ARE HOUSE PLANTS INJURIOUS TO HEALTH?... 127 



BLUE GLASS 130 



PLANT DISEASES 138 



WHAT is A SPECIES? 141 



SOMETHING NEW 146 



APPENDIX: 155 



Fruits true to variety 155 



How to grow figs 155 



.Nectar 155 



Origin of the cabbage 155 



Second flowering of timothy 156 



Apple seeds 156 



Artificial parasites 156 



A gardener's cut 157 



The seat of vitality 157 



Potatoes mixing in the hill 157 



Cactus leaves 157 



Action of Pollen 158 



Sex in melons : 158 



"He and she" squashes 159 



Flavoring water-melons on the vines 1GO 



The seeds of clot-bur 160 



A remedy for orange scale 161 



A fruit tree invigorator 161 



Seed fertilizers 162 



Silica to stiii'en wheat straw 163 



Trifacial oranges 164 



Influence of electricity on plants 166 



