PREFACE Vll 



The author, with great pleasure, thanks the following persons for 

 suggestive help in the preparation of the text-book: Professor J. C. 

 Arthur read the proof of the chapter on the rust fungi; Prof. D. H. 

 Bergey of the University of Pennsylvania the pages dealing with 

 laboratory methods. Prof. Mel T. Cook and his associates J. C. 

 Helyar and C. A. Schwarze of the New Jersey Agricultural Experiment 

 Station, New Brunswick, read the galley proofs throughout and made 

 valuable suggestions. Dr. J. S. Hepburn read the pages dealing with 

 bio-chemistry, Messrs. H. R. Fulton and Donald Reddick also made 

 valuable suggestions as to the arrangement of the contents of the book, 

 while Prof. L. R. Jones and Dr. C. L. Shear furnished illustrations for 

 reproduction in the text. Prof. A. H. Reginald Buller of the University 

 of Manitoba gave permission to use five illustrations in his book, 

 Researches on Fungi. ' ' The au thor desires to express his thanks for the 

 uniform courtesy of members of the firm of P. Blakiston's Son & Co., 

 especially to Mr. C. V. Brownlow, whose unfailing interest has done 

 so much to forward the publication of the work. 



J. W. H. 



