CONTENTS. 



Part I. The Carbohydrate-Amino-Acid Relation in the Respiration of Leaves. 



Introductory discussion 1 



Methods and apparatus 21 



1. The experimental material 21 



2. The apparatus 23 



3. The procedure of the respiration experiments 30 



4. The analyses 33 



Experimental results 35 



1. The normal course of respiration 35 



2. Glycocoll 43 



3. d-glucose . . 45 



4. Sucrose 55 



5. d-levulose 57 



6. d-mannose 64 



7. Effect of the natural increase in amino-acids. Influence of light on amino-acids 

 and effect on respiration 66 



8. The action of amino-acids on sugars 75 



Part II. The Internal Factor in Photosynthesis. 



Introductory discussion •. 76 



Methods and apparatus 84 



1. The experimental material 84 



2. The apparatus ^ 85 



Experimental results 90 



