VIU AUTHORS PREFACE. 



thank him for valuable aid with the Uredineae. To Prof. Dr. 

 Soxhlet I am indebted for literature and the opportunity given 

 to establish a museum of pathological material in connection with 

 the agricultural division of the Munich Technical School. Dr. 

 Solla of Trieste, while working in our laboratory here, very 

 kindly translated the earlier fascicles of the ' Funghi parasitic! ' 

 of Briosi and Cavara as far as they were then published. Prof. 

 Dr. Wollny allowed me to carry out some researches on his 

 experimental fields. Very opportune were the investigations of 

 my pupils, Dr. Woernle and Dr. W. G. Smith, on the anatomical 

 changes in plants attacked by Gymnosporangeae and Exoasceae 

 respectively. 



To all these gentlemen, and to many more who sent me 

 material, but whom it is impossible to name individually in 

 this place, I here express my warmest thanks. 



The reproduction of my drawings and photographs has been 

 most carefully carried out by Herr 0. Cons^e of Munich. I am 

 also deeply indebted to the publisher, Herr Springer, for the 

 excellent manner in which he has done his work ; this will 

 no doubt be also appreciated by the reader. 



V. TUBEUF. 

 Munich, December, 18.94. 



NOTE TO THE ENGLISH EDITION. 



Since the publication of this work, I have received a large 

 contribution of original papers. Though there was no time to 

 embody all these in the English edition, yet many of them 

 have been used for its correction and amplification. Some were 

 of such a kind as to necessitate the re-writing of whole sections, 

 notably those on the genera Exoascus and Gymnosporangium. 

 The remainder will be thoroughly revised if a second German 

 edition be called for. I again take the opportunity of thanking 

 all those who have sent me literature, and I shall be grateful 

 if they will continue to do so in the future. 



v. TUBEUF. 

 Munich, December, 1895. 



