90 HISTORY OF PHYTOPATHOLOGY 



egotism, and human malice, the traits common to most 

 of us, were unknown to him" (Smith, 1912 :4). His 

 bedroom was ever his laboratory. His microscope, a 

 few simple tools, his pencil and paper, on a small table 

 by the window near his bed, sufficed as equipment with 

 which he turned out those classical monographs which 

 have made him famous throughout the botanic and 

 mycologic world. These studies were, like those of de 

 Bary, of fundamental significance for phytopathologic 

 science. The most important of these, aside from the 

 one already mentioned, are his studies on Sclerotinial 

 diseases of fruits, especially the one on Sderotinia cinerea 

 and Sderotinia fmctigena, 1 and on the sunflower rust 

 pathogene, Puccinia Helianthi. 2 



Phytopathology in Holland during the Millardetian 

 period was represented chiefly by the pathogenetist, 

 J. Ritzema Bos. He was the first director of the privately 

 endowed Wille Commelin Scholten Phytopathological 

 Laboratory, established in Amsterdam in 1895 (Riztema- 

 Bos, 1906 : 28-58). In 1906 he was called to take the direc- 

 torship of the Government Institute for Phytopathology at 

 Wageningen, of which he is still the active head (Ritzema- 

 Bos, 1906 : 17-27). He is perhaps best known as the editor 

 of the Dutch journal on plant diseases, Tijdschrift over 

 Plantenziekten, 3 the first issue of which appeared in 1895. 



1 Woronin, M.: tiber Sderotinia cinerea und Sderotinia fructigena, 

 Mem. Acad. Imp. Sci., St. Petersbourg, VIII. Ser. Phys. Math. Cl., 

 10 : 5 : 1-38, 1899. 



2 Woronin, M. : Untersuchungen iiber die Entwickelung des Rostpilzes 

 (Puccinia helianthi), welcher die Krankheit der Sonnenblume verursacht, 

 Bot. Zeit., 30 : 677-683, 693-697, 1872. 



3 Tijdschrift over Plantenziekten, edited 1895-1903 by J. Ritzema 

 Bos and G. Staes; 1904 to date, by J. Ritzema Bos alone. 



