80 HISTORY OF PHYTOPATHOLOGY 



rusts. These reports have appeared in the Zeitschrift 

 fur Pflanzenkrankheiten. He stands in much the same 

 relation to rust work in Germany that Dr. J. C. Arthur 

 does to rust work in America. It is interesting to note in 

 passing that not only are their contributions to phyto- 

 pathology of a very similar type, but their personal 

 resemblance to each other is marked. Klebahn's con- 

 tributions, however, have not been confined to the rust 

 diseases. He has done pioneer work on the diseases of 

 tulips, lilacs, and celery due to other forms of fungi. 

 An examination of the very extensive lists of his publica- 

 tions as given by Lindau and Sydow in Thesaurus 1 and 

 3 will best serve to impress one with the range and 

 volume of this man's contributions to the phytopatho- 

 logic thought of his time. His text-book on the Basis 

 of general phytopathology appeared in 1912.' In the 

 point of view therein expressed and in its treatment of the 

 material it is distinctly of the Millardetian period. 



Of the life and training of Klebahn no data have been 

 available to the writer. A morning spent with him in his 

 laboratories and gardens in Hamburg in the spring of 

 1914 has left a most pleasant impression of the person- 

 ality, ability, and scientific spirit of the man. He is 

 wholly an investigator, keen, and as critical of his own 

 work as he is of that of his contemporaries. 



There are numerous other German workers of the 

 pathogenetist school belonging to the Millardetian 

 period. Space permits the mention of but one other, 

 Oskar Brefeld. While perhaps more truly a mycologist 

 than any of his countrymen above discussed, his work 



' Klebahn, H. : Grundziige der allegemeinen Phytopathologie, pp. 

 1-147, Berlin, 1912. 



