474 Second European Journey 



Pathology, 11 bis rue d'Alesia. There Smith studied the identity 

 of the American and French mulberry blight.® There also he 

 examined, though hastily, materials of Delacroix's so-called bac- 

 terial wilt-diseases of tobacco,^" for purposes of his third volume 

 of Bacteria in Relation to Plant Diseases. There also, through 

 the courtesy of Director Etienne Foex, he carefully examined the 

 matter he had wished to study at Paris in 1906 — whether Dela- 

 croix's B. solanincola was a third organism different from Bacillus 

 phytophthorus and Bacterium solanacearum and the cause of the 

 French disease, brown rot of solanaceae. Delacroix had said in 

 1901, " This bacterium seems to me not different from the Bacillus 

 solariacearum of Erwin F. Smith. Its cultural characters are the 

 same; the signs of the disease observed in the United States on 

 the potato, tomato, and egg-plant are exactly those I have myself 

 seen." 



Smith collected data and, after returning to the United States, 

 revised his manuscript to include a footnote descriptive of his 

 studies at the Station of Vegetable Pathology in Paris.^^ 



From Paris, Dr. Smith went to the Flemish cities of Antwerp 

 and Ghent. He attended the International Exposition of that year 

 where he found the English exhibit on tropical diseases, prepared 

 by the Liverpool School of Tropical Medicine " very full and 

 creditable — on cholera, typhoid, plague, beri beri, sleeping sick- 

 ness and half a dozen other diseases." Literature in all branches 

 of pathology had been increasing enormously during recent years. 

 Delacroix and Maublanc had published not only their Maladies 

 parasitaires des Plantes cultivees (1908-1909) but also their 

 Maladies des Plantes cultivees dans les Pays cbauds which Smith 

 had accepted as the first handbook of tropical plant diseases. ^^ 

 This appeared in 1911 and two years later Melville T. Cook's 

 The Diseases of Tropical Plants. New editions of older works 

 and some first editions of important manuals and textbooks in 

 bacteriology had been published, though Smith's three-volume 

 monograph was being received as the standard work on plant 



^Phytopathology 4(1): 34, Feb. 1914. See also Smith's article, Bacterial mulberry 

 blight, idem 2(4): 175, Aug. 1912; also. Bacterial blight of mulberry, Science 31 

 (803): 792-794, May 20, 1910. 



^"Bacteria in relation to plant diseases 3: 266-267, 263, 1914. 



'■'^Idem, 214-215. 



^- Fifty years of pathology, op. cit., 32-33. 



