CONTENTS. XVn 



PAGE 



Balio of the Oxygen evolved by Plants to tliat of tlie 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 op Nituogen . . . 325 



Amount of Nitrogen in Plants . . 325 



Sources of Nitrogen furnished to Plants . .... 327 



Nitrogen Compounds in the Atmospliere . . . 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 op Sulphur ... . . .... . 336 



-Appropriation of Okganic Matters . . ... ... 337 



Humus-plants, or Saprophytes . ... 337 



Parasites . . .... 338 



Insectivorous or Carnivorous Plants . 338 



Drosera rotundifolia 339 



Dionsea muscipula 842 



Aldrovanda ... 344 



Drosophyllum 345 



Roridula 345 



Bvblis .346 



Pinguicula . 345 



Utrioularia 346 



Genlisea 346 



Sarracenia 347 



Darlingtonia . 349 



Nepenthes 349 



Dipsacus, or Teasel 350 



Epiphytes, or Air-plants 352 



CHAPTER XI. 



CHANGES OF OKGANIC 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 



