494 ''Blackleg'' of the Potato 



7. Harding, H. A., and Morse, W. J. The Bacterial Soft Rots of certain Vege- 



tables. New York Agric. Exp. Sta. Tech. Bull., No. 33, 1909. 



8. VON Hegyi, T>. Einige Beobachtungen betreffs der Schwarzbeinigkeit der 



Kartoffel. Zeitschr. f. Pflanzenkr. xx, s. 79, 1910. 



9. Jensen, H. Versuche liber Bakterienkrankheiten bei Kartoffeln. Centmlbl. 



f. Bakt. Abt. II, Bd. vi, s. 641, 1900. 



10. Jones, L. R. Vermont Exp. Sta. Report, xix, p. 257, 1906. 



11. Kramer, E. Bakteriologische Untersuchungen iiber die Nassfaule der Kar- 



toffelknollen. Oesterreich. landw. Centralbl. Heft i, p. 11, 1891. 



12. Laurent, E. Recherches experimentales sur les maladies des plantes. Annales 



de Vlnstitut Pasteur, Tome xiii, p. 1, 1899. 



13. Massee, G. Diseases of Cultivated Plants and Trees, London, 1910. 



14. Morse, W. J. "Blackleg," a Bacterial Disease of the Stem and Tuber of 



the Irish Potato. Maine Arjric. Exp. Sta. Bull., No. 174, 1909. 



15. Pethybridge, G. H., and Murphy, P. A. A Bacterial Disease of the Potato 



Plant in Ireland. Proc. Roy. Ir. Acad, xxix. Sect. B, p. 1, 1911. 



16. Prillieux and Delacroix. La gangrene de la tige de la pomme de terre, 



maladie bacillaire. Camp. rend, cxi, p. 208, 1890. 



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18. Smith, E. F. Science, xxxi, p. 748, 1910. 



19. . Bacterial Disease of Tomato, Egg-plant and Irish Potato. U.S. Dep. 



of Agric, Div. of Veg. Phys. and Path., Bulletin No. 12, 1896. 



20. . Footnote on page 215, Vol. iii. Bacteria in Relation to Plant Diseases, 



Washington, D.C., 1914. 



21. Leaflets of the Board of Agriculture, Nos. 117 and 242. 



22. Morse, W. J. Studies upon the Blackleg Disease of the Potato, with Special 



Reference to the Relationship of tlie Causal Organisms. Jour. Agric. Re- 

 search, vni, p. 79, 1917. 



{Received April I9th, 1917.] 



