72 HISTORY OF PHYTOPATHOLOGY 



and to present it to a scientific public ready to re- 

 ceive it. 



It is, therefore, not surprising that this doctrine so 

 vitalizing and fruitful during the quarter century pre- 

 ceding should have seen a greater increase in its devotees 

 during the Millardetian period. The discovery of so 

 promising a fungicide as bordeaux mixture must needs be 

 utilized. Known fungous pathogenes had to be more care- 

 fully studied. New ones were sought in connection with 

 every disease of unknown etiology. The pathogenetists 

 flourished. They dominated both as to numbers and 

 influence in every land where plant diseases claimed at- 

 tention. They were supported and strengthened by a 

 host of enthusiastic mycologic contemporaries who had 

 arisen as a result of de Bary's stimulating discoveries 

 and teaching. 



In Germany, the cradle of modern phytopathology, 

 the most distinguished and influential of the pathogene- 

 tists were Hartig, Frank, Kirchner, Brefeld, and Klebahn. 

 They entered the period as young but trained and sea- 

 soned recruits to the Kuhnian standards. Of these, 

 Hartig is the most renowned because of his pioneer and 

 classic researches on the diseases of trees. He will live 

 in the history of our science as the father of forest path- 

 ology. Of predispositionists, Sorauer stands forth with- 

 out a peer, excepting only H. Marshall Ward of England. 



Heinrich Julius Adolph Robert Hartig was born May 

 30, 1839, in Braunschweig, Germany. He was the last 

 of an illustrious line of scientists. His grandfather, 

 Georg Ludwig Hartig, chief forester of Prussia, laid the 

 foundations of modern silviculture. His father, Theodor 

 Hartig, a great forester of his time, was a botanist as 



