604 Third European Journey 



11 bis rue d'Alesia. There he found the laboratory and garden 

 looking " much as they did in 1913." There he met the Japanese 

 professor Yendo, who was interested in silkworm culture and 

 mulberry diseases and to whom Smith had given a letter of intro- 

 duction the summer previous to Etienne Foex. Foex showed Smith 

 a new potato disease from Morocco, which " begins as numerous 

 surface specks " and which he concluded to be "' probably a lenticel 

 infection " which " ends in an interior soft rot." He was shown 

 also " various interesting tobacco diseases," and he met Miss Sara 

 Bache-Wiig, Norwegian by birth but then a professor and graduate 

 of Smith College who had spent a year in study with Whetzel at 

 Cornell and a year with Foex in his laboratory. Smith remembered 

 an assistant and student of mulberry diseases, M. Arnaud, from 

 his work at the laboratory in 1913. He showed them all his crown 

 gall photographs and, in turn, Foex let him see " stained slides 

 of Morocco potato tuber disease. Under the lenticels were dis- 

 integrating tissues and many bacteria (short rods and filaments) ." 



Several more times during this stay in Paris, Smith went to the 

 laboratory. Once he had a "' confab " with the Marquis le Nor- 

 mand de Bretteville, whose family owned large sugar beet interests 

 which had been attacked by the curly top disease ^^ and, still later, 

 Foex showed him " a new dwarfing disease of fodder beets in 

 which no parasite [was] evident. He said," Smith wrote in his 

 journal,*"' " it was not very common and had appeared only in 

 the beets from one lot of seed. The leaves are thickened and 

 die irregularly. The roots I saw were large. Mosaic?" Tumors 

 on PJnus cembra from Nice, France, were also shown him; and 

 Dr. Dufrenoy there promised to write the Forester at Nice to 

 help Smith, when he went to southern France, to procure some 

 specimens of pine tumors. An Egyptian brought out " sections of 

 Psycotma tumors stained with hematoxylin " and, while he saw 

 short and very abundant rods, they were not " sharply outlined." 



Soon after arriving in Paris, Smith had begun to work on " a 

 revision of [his and Miss Quirk's] potentiometer crown-gall 

 paper." The completion of this was interrupted, however, by an 

 invitation to give an address on crown gall. On October 3 he 

 presented his first principal address to an audience of scientists 

 while on this tour. He had but a few days in which to prepare it, 



^^ Journal, Sept. 29, 1924. '" Journal, Oct. 9, 1924. 



