DEDICATION 



The Committee on Photobiology of the Division of 

 Biology and Agriculture of the National Research 

 Council, dedicates this volume to the memory of Dr. 

 Robert Withrow, whose untimely death occurred when 

 he had practically completed the editing. 



Dr. Withrow's death is a great loss to all of us who 

 are interested in the field of photobiology. His broad 

 interests in physics and biology contributed signifi- 

 cantly to the development of photobiology, and his 

 devotion to this field is largely responsible for the suc- 

 cess of this symposium and the preparation of the 

 manuscripts for publication. 



