ACKNOWLl-DGMl^NTS 



Most of the material contained in this book has been quoted 

 direct — or obtained from unpublished correspondence which has 

 never before been generally available. Footnote references explain 

 the previously published sources. Two years before his death, Dr. 

 Smith planned to write an autobiography and materials saved 

 throughout his lifetime for this purpose have provided by far the 

 largest portion of the unpublished sources. The author acknowl- 

 edges his indebtedness to Mrs. E. F. Smith for many interviews 

 and for permission to make use of these materials including diaries, 

 journals, correspondence, reprints, books, etc. Permission, further- 

 more, to use certain official documents and correspondence, copies 

 and originals, has been given by officials of the United States 

 Bureau of Plant Industry. The author obtained photostated copies 

 of a collection of materials held by the Agricultural Division of 

 the National Archives, Washington, D. C. Permission for the 

 use of these has also been granted by officials there. Letters written 

 by Dr. Smith to Dr. W. G. Farlow of Harvard University were 

 photostated; and for permission for their inclusion indebtedness 

 to officials of the Farlow Herbarium is likewise acknowledged. 

 Dr. T. S. Cullen lent the author the originals of the letters from 

 Dr. Smith to him. From various persons and institutions letters 

 written by the subject of this biography have been secured; and 

 each letter has been specially identified by a footnote or in the text. 



The list of libraries and their facilities utilized by the author has 

 included the Library of the United States Department of Agri- 

 culture, that of the United States Department of Education, the 

 Library of Congress, the Library of the Michigan State Board of 

 Health, the Ohio State University Library, that of its Medical 

 School and Botany and Zoology Departments, the Ohio State 

 Library, the Columbus and Bexley, Ohio, Public Libraries, and 

 many libraries of botanical and scientific institutions. Indebtedness 

 to each one is acknowledged, especially the Ohio State University 

 Botany and Zoology Library, and to Dorothy (Mrs. E. M.) Sch.reck 

 its librarian. 



vii 



