viii PREFATORY NOTE 



understand some of the more pretentious tech- 

 nical works on the subject. On the other hand^ 

 he has not sacrificed scientific accuracy in his 

 attempt to make the book one that can be under- 

 stood. It is, then, a book to become acquainted 

 with which wull well repay the student who wishes 

 to learn something of the commoner diseases of 

 these crops. 



The writer of this preface has had the pleasure 

 of reading the whole manuscript and of making 

 suggestions and comments, many of which have 

 commended themselves to the author and have 

 been adopted by him. If these suggestions and 

 additions may serve to make this book more 

 valuable, the writer of this preface feels that he 

 has been amply rewarded. 



E. A. BESSEY. 



Michigan Agricultural College, 



East Lansing, 



Michigan, U.S.A. 



