VI AUTHOR S PEEFACE. 



as to enable the less initiated to find with the greatest ease the 

 information which they require when they desire to treat a 

 diseased plant. 



The author has annexed to the book a glossary of the prin- 

 cipal diseases of plants and the parasites which occasion them. 

 The descriptions given therein afford the requisite information 

 as to the different states of evolution of the parasites whilst they 

 are vulnerable, because such knowledge is indispensable to form 

 a decision as regards the periods at which it may be desirable 

 to apply the effective remedies preventively and curatively. 



In the index, after the name of the cultivated plant, there- 

 follows a list of the diseases from which it may suffer. It suf- 

 fices to turn to the glossary when the reader does not know the 

 cause of any disease, and the name of the disease being identi- 

 fied to find in the index the page where its treatment is de- 

 scribed. 



The author's object will be attained if this book serves as a 

 guide to those who have sought most often in vain a means of 

 restoring health to plants which form the object of their care or- 



the joy of their leisure. 



E. BOURCAKT. 



Paris, 1911. 



TRANSLATOE'S PREFACE. 



Dr. Bourcart has done his work so well that the translator- 

 would fail in his duty if he did not insist on one point on which 

 the author is silent, viz., the enormous value of the great 

 number of tried recipes — recipes which have passed the ordeal 

 of a capable and wise censorship — embodied in this treatise tO' 

 every one interested, whether farmer, gardener, forester or last 

 but possibly not least the manufacturing chemist. But the 

 reader will soon discover for himself that this is not the only 

 featm-e which renders the book unique of its kind. 



DONALD GRANT. 



London, November, 1912. 



