174 Scientific Proceedings, Royal Dublin Society. 



5. I soaked uncut tubers of Sutton's Superlative in a decoction of spore- 

 ball material. Tlie resulting tubers were healthy. Thus, as far as 

 it goes, this experiment indicates that whole seed^ even in scab- 

 contaminated soil, may resist attack and give a healthy crop. 

 Tlie potato crop in Ireland would be much more satisfactory if whole 

 tubers, 3^ oz. in weight, and previously soaked in one or other fungicide, 

 were planted. 



Poor seed tubers, often badly diseased, cut up into three, four, or five sets, 

 placed witli exposed surface in direct contact with the manure, frequently 

 of inferior quality, cannot but give a diseased crop. All the predisposing 

 causes of the production and propagation of disease are allowed to act, and 

 a poor crop must result. 



Spongospora Scab Literature. 



1. Johnson, T. : S^MUf/ospora Solani, Brunch. (Corky Scab). Econ. Proc. 



E.oy. Dublin Soc, i., 1908, Part xii. 



2. Brunchorst, J.: Ueber eine verbreitete Kranklieit der Kartoffel- 



knoUen. (Bergeiis Museums Aarsberetning, 1886). 



3. Johnson, T. : Der Kartoffelschorf : Spongospora Solani, Bruncii. 



Jahresb. d. Vereinigung d. Vertreter d. angew. Bot., iv., 1906. 



4. Massee, G. : Some Potato Diseases. Jouru. Roy. Hortic. Soc, xxix., 



1904. 



5. Massee, G. : English Potato Scab. Journ. Board of Agriculture, xv., 



No. 7, 1908. 



6. Bekkuley, Rev. M. J. : " Observations, Botanical and Physiological, 



on the Potato Murrain." Journ. Hortic. Soc, i., 1846. 



7. Berkeley and Broome : Notices of British Fungi. Ann. Mag. Nat. 



Hist., V. (2ud Series), 1850, p. 464. 



8. Fischer de Waldheim, A. : Apercu Syst. sur les Ustilaginees, 1877. 



9. Mautics, C. F. p. von : Die KartofPel-Epidemie, 1842. 



10. Waij.roth : Evysibe siMervanea. Linusea, 1842. 



11. Frank, H. B. : Kampfbucii g. d. Schadlinge uns. Feldfriichte. 1897, 



p. 177. 



12. Jahn, E. : Myxomycetenstudien. Ber. d. Deutsch. Botau. Ges., xxvi., 



1908. 



13. Olive, E. W. : Cytological studies on Ceratiomyxa. Trans. Wisconsin 



Acad., XV., 1907. 



14. Lagerheim, G. ue : Remarks on the Fungus of a Potato Scab 



[Spongospora Solani, Brunch.). Jouru. of Mycology, vii., 1*^92. 



15. Sorauer : Handb. d. Pilanzenkrankli., 1908, p. 15. 



