THE MILLARDETIAN PERIOD 75 



productive as well as an accurate, painstaking investi- 

 gator. These contributions, while in large part phyto- 

 pathologic, cover a wide range of forestry and botanical 

 subjects, especially physiology and histology. Two 

 new editions of his Lehrbuch appeared, the final one in 

 1900. Two translations of the earlier edition appeared 

 in 1894, one in English and one in Russian. A French 

 translation had been published in 1891. A classical 

 work on the dry rot fungus of structural timbers (Der 

 achte Hausschwamm, Merulius lacrymans) appeared 

 in 1885; another on smoke injury (Die Beschadigung 

 der Nadelwaldbaume durch Hiitten und Steinkohlen- 

 rauch) in 1896. He was engaged on a monographic 

 study of lightning injury at the time of his death (Tu- 

 beuf, 1903 : (22)). 



Of the pathogenetists ranging the general field of 

 phytopathology during this period in Germany, perhaps 

 none is better known or had a wider influence, especially 

 in Germany, than Frank. Trained as a plant physiolo- 

 gist, his early work was along the lines of physiologic 

 biology. He made extensive studies on the biology of 

 the legume organism and was the pioneer in the investi- 

 gations of mycorrhizal fungi. 



Albert Bernhard Frank was born January 17, 1839, in 

 Dresden, where he received his early training in the 

 Realschule and Gymnasium. In 1861 at the age of 

 twenty-two he matriculated in the University of Leipsig, 

 studying medicine and botany. He took his doctor's 

 degree from Leipsig in 1865, at which time he was made 

 curator of the herbarium, becoming shortly thereafter 

 privatdocent, and finally in 1878 assistant professor of 

 botany. Called to the chair of botany in the Agricul- 



