viii CONTRIBUTORS 



Melvin Calvin, Radiation Laboratory and Department of Chemistry, 

 University of California, Berkeley, California 



Henry M. Cathey, Crops Research Division, Agricultural Research 

 Service, United States Department of Agriculture, Beltsville, Mary- 

 land 



Clyde Chandler, Boyce Thompson Institute for Plant Research, 

 Inc., Yonkers, New York 



Robert V. Davis, Jr., Department of Biology, Princeton University, 

 Princeton, New Jersey 



P. J. A. L. de Lint, Laboratory of Plant Physiological Research, 

 Agricultural University, Wageningen, The Netherlands 



R. J. Downs, Agricultural Research Service, United States Depart- 

 ment of Agriculture, Beltsville, Maryland 



Charles F. Ehret, Division of Biological and Medical Research, 

 Argonne National Laboratory, Lemont, Illinois 



WiLLL^M L. Engels, Department of Zoology, University of North 

 Carolina, Chapel Hill, North Carolina 



Donald S. Earner, Laboratories of Zoophysiology, State College of 

 Washington, Pullman, Washington 



R. M. FRAPS, Agricultural Research Service, United States Depart- 

 ment of Agriculture, Beltsville, Maryland 



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

 Washington, Stanford, California 



Arthur W. Galston, Department of Botany, Josiah Willard Gibbs 

 Research Laboratory, Yale University, New Haven, Connecticut 



Arthur C. Giese, Hopkins Marine Station of Stanford University, 

 Pacific Grove, California 



Ernest M. Gifford, Jr., Department of Botany, University of Cali- 

 fornia, Davis, California 



Margaret Cornett Green, Radcliffe College, Cambridge, Massa- 

 chusetts 



Victor A. Greulach, Department of Botany, University of North 

 Carolina, Chapel Hill, North Carolina 



Alan H. Haber, Biology Division, Oak Ridge National Laboratory, 

 Oak Ridge, Tennessee 



John G. Haesloop, Department of Botany, University of North Caro- 

 hna, Chapel Hill, North Carolina 



