CONTENTS 



Preface 



V 



1. Energy Exchange in Photoreactions 1 



Rufus Lumry, Assistant Professor of Chemistry, The University of Utah, 

 Salt Lake City, Utah 



Henry Eyring, Professor of Chemistry, The University of Utah, Salt Lake 

 City, Utah 



2. Electronic Structure and Excitation of Polyenes and Porphyrins . 71 



John R. Piatt, Associate Professor of Physics, The University of Chicago, 

 Chicago, Illinois 



3. Generation, Control, and Measurement of Visible and Near-visible 

 Radiant Energy ■ 125 



Robert B. Withrow, Chief, Division of Radiation and Organisms, Astro- 

 physical Observatory, Smithsonian Institution, Washington, D.C. 



Alice P. Withrow, Plant Phj'siologist, Astrophysical Observatory, Smith- 

 sonian Institution, Washington, D.C. 



4. Energy Efficiency in Photosynthesis 259 



Farrington Daniels, Department of Chemistry, University of Wisconsin, 

 Madison, Wisconsin 



5. The Mechanism of Photosynthesis 293 



E. C. Wassink, Laboratory for Plant Physiological Research, Agricultural 

 University, Wageningen, The Netherlands 



6. The Absorption, Action, and Fluorescence Spectra of Photosyn- 

 thetic Pigments in Living Cells and in Solutions 343 



C. S. French, Department of Plant Biology, Carnegie Institution of Wash- 

 ington, Stanford, California 



Violet M . K. Young, Department of Plant Biology, Carnegie Institution 

 of Washington, Stanford, California 



7. Chlorophyll Formation and Accumulation in Plants 393 



James H. C. Smith, Department of Plant Biology, Carnegie Institution of 

 Washington, Stanford, California 



Violet M. K. Young, Department of Plant Biology, Carnegie Institution of 

 Washington, Stanford, California 



8. Nitrate Reduction 443 



Hans Burstrom, Botanical Laboratory, University of Lund, Sweden 



vii 



71006 



