CONTENTS. XVh 



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 321 



Formic Aldehyde Hypothesis 322 



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 334 



Synthesis of Albuminous Matters in the Plant 335 



APPROPRIATION OF SULPHUR 336 



APPROPRIATION OF ORGANIC MATTERS 337 



Humus-plants, or Saprophytes 337 



Parasites 338 



Insectivorous or Carnivorous Plants 338 



Drosera rotundifolia 339 



Dionaea muscipula 342 



Alclrovanda 344 



Drosophyllum 345 



Roridula 345 



Byblis 345 



Pinguicula 345 



Utricularia 346 



Genlisea 346 



Sarracenia 347 



Darlingtonia 349 



Nepenthes 349 



Dipsacus, or Teasel 350 



Epiphytes, or Air-plants 352 



CHAPTER XI. 



CHANGES OF ORGANIC MATTER IN THE PLANT. 



TRANSMUTATION, OR METASTASIS 354 



Utilization of Food 354 



For Supply of Energy for Work 355 



For Repair of Waste 355 



For Construction of New Parts 355 



Assimilation proper compared with Respiration 356 



Course of Transfer of the Assimilated Matters in the Plant . 356 



