AUTHOR'S PREFACE. 



This Introduction to the study of Plant Diseases 

 has been compiled primarily for the use of Farmers, 

 Gardeners, and Agricultural Students, but it is 

 hoped that it may have a wider field of infiuence, 

 and that those engaged in teaching and County 

 lecturing may find in Its pages material of interest 

 and of value. 



I have aimed at simplicity In definition and 

 have not attempted too much detail of a purely 

 scientific nature. I am aware of its Incomplete- 

 ness, but Its size precludes the Inclusion of the 

 more minor diseases and of fuller details In the 

 case of those diseases treated. I hope, however, 

 that any deficiency In detail will be compensated 

 for by the points of special merit, and that It may 

 be found worthy of a place on every agriculturist's 

 bookshelf. 



Many of the drawings are original, and where 

 otherwise are duly acknowledged. 



