CONTENTS. XV11 



PAGE 



Ratio of the Oxygen evolved by Plants to that of the Carbonic Acid 



decomposed 319 



What are the Products of Assimilation proper? 320 



First Visible Product of Assimilation 821 



Formic Aldehyde Hypothesis 822 



Pringsheim's Views in regard to the First Product of Assimilation . 322 



Early History of Assimilation 323 



APPROPRIATION OF NITROGEN 325 



Amount of Nitrogen in Plants 325 



Sources of Nitrogen furnished to Plants 327 



Nitrogen Compounds in the Atmosphere 331 



Nitrogen Compounds in Rain-water 331 



Office of the Atmosphere in the Formation and Distribution of Nitro- 

 gen Compounds 332 



Products of the Decomposition of Animal and Vegetable Matter . . 333 



Natural and Artificial Fertilizers 834 



Synthesis of Albuminous Matters in the Plant 336 



APPROPRIATION OF SULPHUR 336 



APPROPRIATION OF ORGANIC MATTERS 337 



Humus-plants, or Saprophytes 337 



Parasites 838 



Insectivorous or Carnivorous Plants 338 



Drosera rotundifolia 339 



Dionaea muscipula 342 



Aldrovanda 344 



Drosophyllum 345 



Roridula 345 



Byblis 346 



Pinguicula 346 



Utricularia 846 



Genlisea 346 



Sarracenia 847 



Darlingtonia 849 



Nepenthes 349 



Dipsacus, or Teasel 860 



Epiphytes, or Air-plants 362 



CHAPTER XI. 



CHANGES OF ORGANIC MATTER IN THE PLANT. 



TRANSMUTATION, OR METASTASIS 854 



Utilization of Food 354 



For Supply of Energy for Work 356 



For Repair of Waste 365 



For Construction of New Parts 365 



Assimilation proper compared with Respiration 356 



Course of Transfer of the Assimilated Matters in the Plant .... 366 



