X Preface ,"■".. 



E. I. du Pont de Nemours and Co., Q'rasselli .G-heraicals Department, Wilmington, 



Delaware. 

 Eli Lilly and Co., Agricultural and Research E^epartment, Greenfield, Indiana. 

 Hercules Powder Co., Naval Stores Research Division, Wilmington, Delaware. 

 Merck and Co., Product Development,,Plaht Chemical Section, Rahway, New Jersev. 

 Monsanto Chemical Co., Agricultural Chemicals Section, "St. Louis, Missouri. 

 Food Machinery and Chemical Corp., Niagara Chemical. Division, Middleport, New 



York. 

 Rohm and Haas Co., Philadelphia, Pennsylvania. 



Shell Development Co., Agricultural Research Division, Modesto, California. 

 United Fruit Co., Boston, Massachusetts. 

 Upjohn Co., Research Division, Kalamazoo, Michigan. 



Many individuals from the sponsoring institutions were necessar- 

 ily involved in making the Conference a success. Mrs. Bettie Brooks, 

 Executive Assistant to the Managing Director, Dr. Clyde Chandler, 

 and Mrs. Florence Flemion of the Boyce Thompson Institute and 

 Mrs. Eileen Kene and Miss Bernice Winkler of The New York Botan- 

 ical Garden did a great deal of the indispensable behind-the-scenes 

 work that resulted in a smoothly running Conference. The excellent 

 work of our recording engineer, Mr. W^illiam R. Begany, permitted 

 the transcription of the discussion periods. Mrs. George L. McNew 

 and Mrs. William C. Steere arranged programs for the wives and 

 families of the participants. The heroic efforts of Dr. McNew for ob- 

 taining the necessary financial support, for making special arrange- 

 ments for just about everything, and for being, withall, a charming 

 host, warrants a rising vote of thanks. 



Publication of these proceedings required considerable cooperation 

 and forbearance from the many participants. The invaluable assist- 

 ance of Dr. S. E. A. McCallan with text and figmes is most grate- 

 fully acknowledged. Mr. A\'illiam G. Smith, Jr., head of the Illustra- 

 tion Division of Boyce Thompson Institute, did yeoman service in 

 preparing the figures for the book. Special thanks are due Mrs. Bettie 

 Brooks for reading both the galley and page proof with painstaking 

 thoroughness. The editors are also indebted to Dr. R. E. Buchanan 

 for careful and conscientious preparation of a meaningful, compre- 

 hensive index. The concerted efforts of the Editorial Committee and 

 of Mr. Marshall Townsend, Manager of the Iowa State University 

 Press, made the (iiainnnn's task almost too easy. 



Richard M. Klein 



Chairman, Editorial Committee 



