CONTENTS 



CHAPTER PAGE 



I. BIOTIC STRUCTURE AND BIOTIC ENERGY - - 1 



II. LIFE AND LIGHT - ..... 21 



III. SYNTHESIS BY SUNLIGHT IN RELATIONSHIP TO THE ORIGIN OF 



LIFE 38 



IV. THE PRESENCE OF INORGANIC IRON COMPOUNDS IN THE 



CHLOROPLASTS OF THE GREEN CELLS OF PLANTS - - 53 



V. THE FORMATION OF NITRITES FROM NITRATES IN AQUEOUS 



SOLUTION BY THE ACTION OF SUNLIGHT - 69 



VI. THE ACTION OF LIGHT RAYS ON ORGANIC COMPOUNDS, AND THE 



PHOTO -SYNTHESIS OF ORGANIC FROM INORGANIC COMPOUNDS 79 



VII. STUDIES OF PHOTO-SYNTHESIS IN FRESH- WATER ALG^E - 99 



VIII. STUDIES OF PHOTO-SYNTHESIS IN MARINE ALG.S: - 115 



IX. ENERGY TRANSFORMATIONS IN LIVING MATTER - 125 



X. CHEMICAL TRANSFORMATIONS IN LIVING MATTER AND ITS PRO- 

 DUCTS - - 138 



XI. VELOCITY OF REACTION, AND THE COMPARATIVE ACTION OF 



ENZYMES AND CELLS - - 164 



XII. INFLUENCE OF OTHER FACTORS UPON ENZYMES AND CELLS - 202 



XIII. THEORIES AS TO MODE OF ACTION OF CATALYSTS AND ENZYMES 232 



XIV. SECRETION AND GLANDULAR MECHANISMS - 245 



XV. THE EQUILIBRIUM OF COLLOID AND CRYSTALLOID IN LIVING 



CELLS .--.-... 300 



vii 



