﻿VI PREFACE. 



49 Japanese, by Professor Percy Wilkinson, of Melbourne, and Professor 



J. Sakurai, of Tokyo. 

 93 Bohemian, by Professor Bohuslav Brauner, of Prague. 

 125 Dutch, by Professor J. H. van 't Hoff, of Rotterdam. 

 141 Portuguese, by Professor Charles Le Pierre, of Lisbon. 

 205 Swedish, by Professor P. T. Cleve, of Upsala. 



( Danish, \ 

 644 -< Norwegian, v by Mr. Axel Moth, of Copenhagen and New York. 



( Swedish, J 

 760^ Russian, by Professor A. Krupsky, of St. Petersburg. 



To these gentlemen sincere thanks are due for their valuable and efifi- 

 cient co-operation. It is to be regretted that promises made by others were 

 not fufilled. 



I am under obligations to several persons for assistance in proof-read- 

 ing. Dr. Immanuel M. Casanowicz, of the Smithsonian Institution, read the 

 Russian ; Mr. Louis Solyom, of the Library of Congress, read the Polish, 

 Bohemian, and Slavonic languages ; Miss Aletta S. S. Nickelsen, of the 

 Smithsonian Institution, read the Swedish, Danish, Norwegian, and Fin- 

 nish ; and Mrs. Henry Carrington Bolton read the Italian and assisted 

 in reading the proof of the entire volume. 



In the preparation of this Supplement I visited the following Institu- 

 tions and wish to express sincere thanks for personal attentions shown me 

 by their Directors, Librarians, and Assistant Librarians : Biblioteca Nazi- 

 onale, Naples ; Biblioteca Nazionale Centrale Vittorio Emanuele, Rome ; 

 Istituto Chemico, Rome ; Biblioteca Marucelliana, Florence ; Biblioteca 

 Nazionale, Florence ; Biblioteca Brera, Milan ; Bibliotheque Royale, 

 Brussels ; Bibliotheque Nationale, Paris ; British Museum, London ; Har- 

 vard University, Cambridge ; Public Library, Boston ; Massachusetts 

 Institute of Technology, Boston ; Public Library, New York ; Columbia 

 University, New York ; as well as the following in Washington, D. C. : 

 United States Department of Agriculture, United States Geological Sur- 

 vey, Library of Congress, United States Patent Office, Smithsonian Insti- 

 tution, and the Surgeon-General's Office of the United States Army. 



Henry Carrington Bolton. 

 Washington, D. C. 



