5^ 



time on a flood of publications, proportionate to the very severe injury to 

 national property from these diseases. We will emphasize among these pub- 

 lications only those of Focke', Paycn-', Schacht", Speerschncider*, v. Holle'', 

 Kiihn" and de Bary". (Further bibligraphical references may be found in 

 the detailed discussions of the different diseases). 



It was natural that a phenomenon, such as the potato epidemic, would 

 necessarily bring fungous diseases into prominence and increase the whole 

 .'^tudy of mycology. At the same time the economic importance of smut 

 fungi also began to receive greater and greater consideration. Tillet^, Tes- 

 sier", and Prevost^", had early studied the smut of grains and at present we 

 liave acquired a considerably extended insight into the nature of those dis- 

 eases and also into the means of combatting them from de Bary's^^ investi- 

 gations and Brefeld's studies, extending over many years. The prevalence 

 of smut diseases lias led to the develojMiient of the sterilization of seed. 



In the second volume of this work, which treats of parasitic diseases, 

 ihe overpowering number of mycological works will be mentioned, — we will 

 here mention only some of the most important ones, treating of fungus 

 families as a whole. Elias Fries' great work completed in 1832, has already 

 been considered. In 1831 the first part of Wallroths "Kryptogamenflora"'- 

 appeared and in 1833 the second part. In this book the cryptogams 

 were worked up by Math. Joe. Bluff and Carl Ant. Fingerhuth. In 1842 

 Rabenhorst's "Kryptogamenflora"^^ began and in 1851 Bonorden's "Hand- 

 buch der Mykologie"^*, which has proved to be very useful because 

 of its cuts of microscopic fungus forms, although these had been 

 sufficiently considered in the illustrations of Schiift'er, Persoon, Greville, 

 Sowerby, Sturm, Krombholz and Nees sen. To be sure Corda's "Icones 

 fungorum" had already been published and his "Anleilung zum Studium der 

 Mykologie"^'^ which is provided with very small drawings; leaving the 

 peculiarity of his classification out of the question, however, Corda limit- 

 ed himself to the easily visible developmental stages, while Bonorden sought 

 to determine the tissue structure. This author, in opposition to Unger, em- 

 phasized the fact that parasitic fungi are unquestionably independent organ- 



I Die Krankheit der Kartoffeln im Jahre 1845. Bremen 1846. 



^ l^es maladies des pommes de terre, des betteraves, des bles et des vig-nes. 

 Paris 1853. 



3Schacht, Bericht liber die Kartoffl^pflanze und deren Krankheiten. Berlin 1854. 



* Das Faulen der Kartoffelknollen. Flora 1857. Bot. Z. 1857. 



Ueber den Kartoffelpilz. Bot. Zeit. 1858. 



« Die Krankheiten der Kulturgewachse, ihre Ursachen und \'erliiitung. Berlin 

 1858. 



' Die Kartoffelkrankheit. Leipzig 1861. 



« Dissert, sur la cause qui corrompt les graines de hie, 1755. 



" Traite des maladies des graines, 1783. 



10 Memoire sur la cause de la carie des bles, 1807. 



II Untersuchung-en iiber die Brandpilze. Berlin 1853. 



12 Flora cryptogamica Germaniae auctore Ferd. Guil. Wallrothio, Med. et Chir. 

 Doctore etc. Norimbergae 1831-33. 



13 Kryptogamenflora von Deutschland, Vol. I., Leipzig- 1844. 2nd Edition. I-VII. 

 1884-1903. 



1* Handbuch der Allgemeinen Mykologie etc. with 12 plates. Stuttgart 1851. 

 15 Anleitung- zum Studium der Mykologie nebst kritischer Beschreibung- aller 

 bekannten Gattungen. Prag 1842. 



