THE ZALLINGEEIAN PERIOD 27 



as a thesis for his doctorate at Leipzig, in 1723, a dis- 

 sertation on the physiology of the death of plants, in 

 which he classifies diseases according to the period of the 

 plant's Hfe in which they appear, thus, (1) diseases of 

 the germinating period, (2) diseases of the vegetative 

 period, and (3) diseases of the fruiting period (Sorauer, 

 1909 :45). 



JoHANN Christian Fabricius. 

 The first pathogenetist. (After an engraving in Lind's "Danish Fungi.") 



Johann Christian Fabricius, the first Dane to write on 

 plant pathology, published his complete classification in 

 1774 in his Essay on phytopathology,^ in which he 

 presents views far in advance of his day. He holds, for 



1 Fabricius, Joh. Christ. : Forsog til en Afhandling om Planternes 

 Sygdomme. In Det Kongl. Norske. Vidensk. Selsk. Skriften, S : 431- 

 492, Kiobenhavn, 1774. What appears to be this same thing is cited 

 by Boehmer in his Handbuch der Naturgeschichte, 3 :1 : 523, thus: 

 "Joh. Chr. Fabricius de morbis plantarum; in Act. Soc. Scient. Norweg. 

 To. 5. p. 431." No date is given. 



